数码天地 今日: 0|主题: 4758|排名: 53 

最后发表： msolucky
回复内容：
竞技有很多种的，再说战地2142吸引人的地方不仅是对各个兵种的了解，武器的了解和载具的了解，关键还有全局的战略眼光，有机会试试的好。

最后发表： key
回复内容：
现在用cygwin，觉得也可以。
下载这个来玩玩，看有什么新发现。

最后发表： key
回复内容：


事务我有点了解，容错是怎么一回事？

最后发表： justinli79
回复内容：
DING

最后发表： xblues
回复内容：
Table of contents                                       

•                                                                                                                                 1 –                                                                                                                                         March Review/April Updates                                                               
•                                                                                                                                 2 –                                                                 Best PCIe Card: $60 To $100
•                                                                                                                                 3 –                                                                 Best PCIe Card: $120 To $200
•                                                                                                                                 4 –                                                                 Best PCIe Card: $200 To $390

•                                                                                                                                 5 –                                                                 Best PCIe Card: $400 And Up
•                                                                                                                                 6 –                                                                 Conclusion
•                                                                 7 –                                                                 More on this topic

                               
                                                                                                                                                                                Detailedgraphics card specifications and reviews are great—that is, if you havethe time to do the research. But at the end of the day, what a gamerneeds is the best graphics card within a certain budget.
So if you don’t have the time to research the benchmarks or if youdon’t feel confident enough in your ability to pick the right card,fear not. We at Tom’s Hardware have come to your aid with a simple listof the best gaming cards offered for the money.
March Review and April Updates:It's no secret that the brand new GeForce GTX 275 and Radeon HD 4890have been released since our last update. Those two cards have been thebiggest graphics card news we've had in a while. So, let's go overthese new products and consider where they stand from aprice-performance perspective.
We'll begin by talking about the card that was reviewed here first:the Radeon HD 4890. While the RV790 graphics processor is a re-spunversion of the RV770 found in the older Radeon HD 4870 and Radeon HD4850, it isn't equipped with any new features and is manufactured usingthe same 55 nm process. Essentially, the new RV790 is an RV770 tweakedto maximize overclocking potential. And maximize overclocking potentialit does, with a 1 GHz overclock setting considered viable enough thatit's included in AMD's own Overdrive overclock utility and in thedriver.
As great as this sounds, the real-life performance benefits of anoverclock are usually limited by the architecture in the first place.As impressive as the Radeon HD 4890 is with its 100 MHz core and 75 MHzmemory overclock versus the older Radeon HD 4870, we're looking at areal-world 10% speed increase over the cheaper Radeon HD 4870. From avalue standpoint, this speed increase isn't worth the ~$70 pricepremium over a single Radeon HD 4870 or GeForce GTX 260. In fact, thenew Radeon HD 4890 is priced about $10 away from the performance/valueleading Radeon HD 4850 X2, which sports CrossFire on a single card.
With that assessment in mind, let's have a look at Nvidia's answerto the Radeon HD 4890: the brand new GeForce GTX 275, which has a lotmore to offer than just a simple overclock. The new GeForce GTX 275 GPUis the same 55 nm processor that can be found in Nvidia's flagshipGeForce GTX 295 card, the important difference being that the GTX 295sports two of these GT200 graphics processors in an SLI-on-a-cardconfiguration, while the GeForce GTX 275 is equipped with just one.
Since the GeForce GTX 275 specifications are a mix between theGeForce GTX 285 (240 shader processors) and the GeForce GTX 260 (28ROPs and a 448-bit memory bus), its performance lies somewhere betweenthese two products. Lower-resolution performance tends to be close tothat of the GTX 285 and higher resolutions cause the performance todrop down in the direction of the GeForce GTX 260.
However, the end result is that the new GeForce GTX 275 performsvery close to the new Radeon HD 4890. This is all well and good, exceptthat we once again have to compare it to the similarly-priced Radeon HD4850 X2, against which neither of these new cards stand a chance.
The bottom line is that for these new cards to be priced accordingto the value of their relative performance, they would have to retailfor about $210. As long as they remain within spitting distance of theRadeon HD 4850 X2, they're going to be an extremely hard sell from avalue standpoint.
Other than these new products, the graphics card market has remainedsomewhat stable with a few prices slightly shifting up or down. Let'smove on to our recommendations.
Some Notes About Our RecommendationsA few simple guidelines to keep in mind when reading this list:

• This list is for gamers who want to get the most for theirmoney. If you don’t play games, then the cards on this list are moreexpensive than what you really need;
• Prices and availabilitychange on a daily basis. We can’t offer up-to-the-minute accuratepricing info, but we can list some good cards that you probably won’tregret buying at the price ranges we suggest;
• The list isbased on some of the best U.S. prices from online retailers. In othercountries or at retail stores, your mileage will most certainly vary;
• These are new card prices. No used or open-box cards are in thelist—they might be a good deal, but it’s outside the scope of whatwe’re trying to do.
• You'll notice the Newegg themes are similarto what you see in our System Builder Marathons. Before this story wentlive, we hunted down the best prices on these recommendations. Thatdoesn't mean prices won't change later, but you should at least get agood idea of the low prices for most of our suggestions.

                       
                                                                                                       

•                                                
  •                                                                                                                                                                                         1 |
  •                                                                                                                                                                                         2 |
  •                                                                                                                                                                                         3 |
  •                                                                                                                                                                                         4 |
  •                                                                                                                                                                                         5 |
  •                                                                 7

http://www.tomshardware.com/reviews/radeon-geforce-gtx,2270.html


fgfg

最后发表： kane321
回复内容：
我更喜歡p系列...902和1200有點像,900是第一代設計

最后发表： xblues
回复内容：
中规中矩的一个全尺寸机箱，MSY售价107刀，在所有MSY不包括电源的机箱中，这一款是最便宜的了。

http://msy.arpatubes.net/display ... amp;amp;query=16968

最后发表： xblues
回复内容：
Testing MethodologyNow that we know how far our Phenom IIX4 920 can be overclocked with air-cooling, we decided to check theperformance level we could achieve with an overclocked CPU. The maingoal was to find out if the new AMD processor could become a better buyfor overclockers than quad-core Intel CPUs from the same price range.So, the main action during this test session will be about the side byside comparison of Phenom II X4 920 overclocked to 3.72 GHz againstoverclocked Core 2 Quad Q8300 and Core 2 Quad Q6600. Intel set theprice point for these processors at $183, while Phenom II X4 920 isofficially priced at $195. Moreover, we have also included a moreexpensive Core 2 Quad Q9300 processor. Although it has almostcompletely disappeared from the official price-list, it is stillretailing widely for a somewhat higher price than that of Phenom II X4920.
As we have already mentioned in our previous reviews,the overclocking potential of junior Intel processors from Q8000 andQ9000 series is determined not by the frequency potential of thesemiconductor dies, but by the ability of the chipsets and mainboardsto ensure stable operational conditions at high FSB speeds. Therefore,we decided to test our Core 2 Quad processors with a popular ASUS P5Q Pro mainboard.It allows increasing the FSB frequency to 475 MHz for quad-coreprocessors. So, Core 2 Quad Q8300 and Core 2 Quad Q9300 with a 7.5xmultiplier were overclocked to 3.56 GHz (7.5 x 475 MHz) in order to beable to compete against Phenom II X4 920. It is the average frequencythe owners of these processors can count on.
Theprevious-generation quad-core Intel Core 2 Quad Q6600 processor isinitially designed to work with 266 MHz bus, so its multiplier ishigher and equals 9x. So, its overclocking potential was not limited bythe mainboard, although high heat dissipation wouldn’t let us push itsfrequency over 3.6 GHz (9 x 400 MHz).
To get a general idea ofoverclocked processors’ performance we included a few high-end CPUs intheir nominal mode: Core 2 Quad Q9650, Core i7-920 and Core i7-940. Youwill also see the results demonstrated by Phenom II X4 920, Core 2 QuadQ8300, Core 2 Quad Q9300 and Core 2 Quad Q6600 processors in theirnominal mode. They will help us estimate the performance gain fromoverclocking.
As a result, we put together three different platforms on 7 processors:
1.  AMD Socket AM2+ platform:

• CPU: AMD Phenom II X4 920 (Deneb, 2.8 GHz, 6 MB L3);
• Mainboard: Gigabyte MA790GP-DS4H (AMD 790GX + SB750).
• Memory:  GEIL GX24GB8500C5UDC (2 x 2 GB, DDR2-1067 SDRAM, 5-5-5-15).
• Graphics card: ATI RADEON HD 4870.
• HDD: Western Digital WD1500AHFD.
• OS: Microsoft Windows Vista x64 SP1.

2.  Intel LGA775 platform:

• CPUs:
  • Intel Core 2 Quad Q9650 (Yorkfield, 3.0 GHz, 333 MHz FSB, 2 x 6 MBL2);
  • Intel Core 2 Quad Q9300 (Yorkfield, 2.5 GHz, 333 MHz FSB, 2 x 3 MB L2);
  • Intel Core 2 Quad Q8300 (Yorkfield, 2.5 GHz, 333 MHz FSB, 2 x 2 MB L2);
  • Intel Core 2 Quad Q6600 (Kentsfield, 2.4 GHz, 266 MHz FSB, 2 x 4 MB L2).
• Mainboard: ASUS P5Q Pro (Intel P45 Express).
• Memory:  Corsair TWIN2X4096-8500C5 (DDR2-1067 SDRAM, 2 x 2 GB, 5-5-5-15).
• Graphics card: ATI RADEON HD 4870.
• HDD: Western Digital WD1500AHFD.
• OS: Microsoft Windows Vista x64 SP1.

3.  Intel LGA1366 platform:

• CPUs:
  • Intel Core i7-940 (Bloomfield, 2.93 GHz, 8 MB L3);
  • Intel Core i7-920 (Bloomfield, 2.66 GHz, 8 MB L3).
• Mainboard: ASUS P6T Deluxe (Intel X58 Express).
• Memory:  Kingston HyperX KHX16000D3K3/3GX (DDR3-1333 SDRAM, 3 x 1 GB, 7-7-7-20).
• Graphics card: ATI RADEON HD 4870.
• HDD: Western Digital WD1500AHFD.
• OS: Microsoft Windows Vista x64 SP1.

Four processors out of seven were tested not only in their nominal mode but also during overclocking:

• AMD Phenom II X4 920:

• Intel Core 2 Quad Q6600:

• Intel Core 2 Quad Q8300:

• Intel Core 2 Quad Q9300:

PerformanceGeneral PerformanceTheresults in the complex SYSmark 2007 test turned out not quiteoptimistic. Overall, even though Phenom II X4 920 outperforms itsdirect rivals in nominal mode, overclocking changes this picture. EvenCore 2 Quad Q8300 processor overclocked to 3.57 GHz outperforms PhenomII X4 920 working at 3.72 GHz. On the one hand, it once again indicatesthat Intel processors boast better IPC (instructions per clock), but onthe other – shows that Intel CPUs boast higher frequency potential,even though it is not fully revealed. While Phenom II X4 920overclocked by 33%, Core 2 Quad Q8300 reached 43% higher frequency whenit was stopped by the mainboard’s inability to catch up.
However,things are a little different in certain type of applications. Forexample, overclocked Phenom II X4 920 processor is a little ahead ofCore 2 Quad Q8300 in E-Learning scenario working with vector and rasterimages, PowerPoint presentations, PDF-files and flash-videos. And italmost catches up with the overclocked Core 2 Quad Q9300 inProductivity scenario that works with Microsoft Office suite.

Gaming PerformanceAtfirst glance, the new AMD solution seems to be winning in 3D games.Phenom II X4 920 working at 3.72 GHz outperforms its major Core 2 QuadQ8300 competitor in every single test we used. However, it most likelyhappens due to seriously cut-down cache-memory of the Intel CPU. Thatis why when we compare the performance of our Phenom II X4 920 againstthat of an overclocked Core 2 Quad Q6600, the outcome is no longer inAMD’s favor: even though Q6600 processor belongs to the previousgeneration, it features an 8MB L2 cache.
Overall, we are notreally talking about any serious performance differences. OverclockedPhenom II X4 looks quite well and demonstrates very good performance.Nevertheless, I have to say that overclocking a $200 quad-coreprocessor will not provide the users with the same performance thatthey could get from higher-end more expensive CPUs, even working attheir nominal speeds.

Video EncodingVideoencoding is the best application for the new AMD processors. Phenom IIX4 920 outperforms its rivals in nominal mode as well as duringoverclocking. By the way, at 3.72 GHz it also outperforms Core 2 QuadQ6600. However, it is still very far behind the impressive resultsdemonstrated by Core i7 CPUs. No wonder, since SMT technologyimplemented in the latest Intel solutions matters here a lot.

RenderingItis pretty hard to put together a single verdict at this type ofworkload. As you can clearly see from the diagrams, everything dependson the rendering application. Nevertheless, we can’t help stressing theimpressive results of Core i7 CPUs: they are evidently the best choicein easily paralleled computational tasks. No doubt about that.

Other ApplicationsFritzand Folding@Home are another two examples where “pure” computationspower of the CPU is important. So processors with higher IPC win inthese tests, and Phenom II X4 920 is evidently not one of them.Overclocking Phenom II X4 920 doesn’t help here either. The onlyconsolation is outperforming a much more expensive Core 2 Quad Q9650.
Thesituation in Photoshop is also not the best for Phenom II X4 920. Withor without overclocking, it yields to its main rival – Core 2 QuadQ8300.
However,the results of the WinRAR test will be a real pleaser for AMD fans. Thenew AMD CPU as always scores very high in this application.

Power ConsumptionOur Phenom II X4 920 performance testsshowed that it may be a very good choice for an overclocker platform.But before we draw any final conclusions, let’s see if it turns out aspower-efficient as Intel CPUs. So, we measured the power consumption ofa system (without the monitor) built around AMD Phenom II X4 920 in itsnominal mode and during overclocking  and compared these resultsagainst similar platforms built with Intel CPUs from the same pricerange, namely, Core 2 Quad Q8300, Core 2 Quad Q9300 and Core 2 QuadQ6600.
During this test session we loaded the CPUs using Prime95utility. Besides, we activated all power-saving technologies, such asC1E, Cool’n’Quiet and Enhanced Intel SpeedStep, to make sure that thepower readings in idle mode were correct. It is important to rememberthat Enhanced Intel SpeedStep is implemented in such a way that duringoverclocking it doesn’t change the processor core voltage, but stilllowers their frequency under low workload. AMD Cool’n’Quiet technology,however, is fully operational even in an overclocked system.

	Idle	100% Load
Phenom II X4 920	144 W	219 W
Core 2 Quad Q6600	157 W	246 W
Core 2 Quad Q8300	135 W	189 W
Core 2 Quad Q9300	136 W	192 W
Phenom II X4 920 @ 3.72GHz	153 W	312 W
Core 2 Quad Q6600 @ 3.6GHz	212 W	318 W
Core 2 Quad Q8300 @ 3.56GHz	141 W	236 W
Core 2 Quad Q9300 @ 3.56GHz	142 W	241 W

Unfortunately,new AMD processors still lose to alternatives from Intel even thoughthey are now manufactured with more advanced 45nm process. Even innominal mode a system on Phenom II X4 920 processor consumes 20-30 Wmore than similarly performing platforms on Intel CPUs. In fact,power-efficiency of the new Phenom II X4 processors improved onlycompared to the previous-generation quad-core Intel processorsmanufactured with 65nm process that are still widely available inretail.
During overclocking, the situation is not any better forAMD offering. Although Phenom II X4 920 boasts fully operationalCool’n’Quiet technology in overclocked mode, even in idle mode thesystem built on it consumes more power than Core 2 Quad Q8300 and Q9300based platforms. When the CPU utilization hits 100%, the powerconsumption difference turns more than serious and reaches 70-80 W.Moreover, power consumption of an overclocked Phenom II X4 920 basedsystem is almost the same as that of Core 2 Quad Q6600 (3.6 GHz) basedsystem.
However, there is a very logical explanation why the newAMD CPU didn’t impress us with its power consumption readings duringoverclocking. Even though Phenom II X4 processors use 45nm cores, theyrequire much higher Vcore than Intel processors.

ConclusionPhenom II X4 processors didn’t bring the desktopperformance to any revolutionary heights. Unfortunately, even newmanufacturing process doesn’t let AMD design CPUs that couldsuccessfully compete against Intel solutions in all price segments. Andalthough the clock frequencies of the new AMD processors increasedsignificantly, their performance turned out limited by the Stars (K10)microarchitecture potential, because it boasts lower IPC than thecurrent Intel microarchitecture. Phenom II X4 920 we have justdiscussed is a great illustration to everything we have just said. Atits nominal 2.8 GHz it can only compete against Core 2 Quad running at2.4 – 2.5 GHz frequencies. Only smart pricing strategy helps AMD here:they positioned Phenom II X4 920 in such a way that it turns out alittle better than the identically priced Core 2 Quad models.
However,overclockers have their own perception of the situation. They areprimarily interested in the processor’s ability to work in modes otherthan nominal. And here the new Phenom II X4 appeared much moreattractive than their predecessors. We could easily overclock ourPhenom II X4 920 processor by 33% clock frequency without anysophisticated cooling involved. At this frequency our CPU was onaverage faster than an overclocked Core 2 Quad Q8300. This resultcertainly makes quad-core Phenom II X4 920 a good overclocking choicein the sub-$200 price range.
However, you shouldn’t overestimatethe overclocking potential of Phenom II X4 920 processor, because Core2 Quad Q8300 is far not the strongest competitor in the Intel camp. Forinstance, the similarly priced Core 2 Quad Q6600 can hit much higherfrequencies than Core 2 Quad Q8300, even though it belongs to theprevious generation. So this processor can be on average faster thanPhenom II X4 920 working at a higher frequency, too.
Anotherweakness of the new Phenom II X4 920 processor, which stands out moreduring overclocking especially, is high power consumption. According toour tests, at 3.72 GHz it falls far behind more power-efficient Intelprocessors from Q8000 and Q9000 series. In fact, it almost catches upwith Core 2 Quad Q6600 here.
Nevertheless, we are extremelypleased with the results demonstrated by Phenom II X4 920. Although itdidn’t outperform the similarly priced Core 2 Quad dramatically, wecan’t say that it yields a lot to its rival, either. And it means thatAMD has every chance to become quite popular among overclocking fansdue to their new 45nm processors.

最后发表： xblues
回复内容：
AMD的支持DDR3的AM3平台目前无论是CPU还是主板都已经上市了。MSY也已经跟进，都可以买到了，尽管价格还没有国内公道。

DDR3比DDR2带来少于5%的性能提升，但是价格上DDR3贵大约50-刀。整体来看DDR3平台所能够带来的综合性能的提升还是不是十分明显的。DDR3平台的性价比不如DDR2平台。

AMD的 Phenom II X4 920/810的性能介于Intel Core 2 Quad 8200和8300之间，但是超频性能更佳。

最后发表： xblues
回复内容：
支持AMD的这款新的AM3 CPU可以超频，但是和Intel的相比，超频性能有限，另外挑内存。由于集成显卡，主板上没有风扇，安装系统以后就少掉了主板和外置显卡的2个风扇，只剩下CPU和电源的2个风扇了，系统会安静不少。

集成显卡HD3300的游戏性能不佳，这款主板用的是VIA的集成声卡（不太普及），超频性能不好，很适合初级入门用户选购，但是如果你有更好的要求，还是考了其他的选择吧。

MSY报价225刀。

最后发表： bg1pdq
回复内容：


我已经三次通过这个网站完成购物了。服务质量：好。

最后发表： xblues
回复内容：
这个网站的评论不错，写的十分细致，你可以看到，评论这么长。
这是技嘉的一块新主板，支持新发布的AMD AM3 CPU，支持DDR3内存，不集成显卡。如果性能要紧的话，可以考虑买这个主板，搭配双显卡，组装游戏系统。

MSY报价228刀。

http://www.xbitlabs.com/articles ... e-ma790xt-ud4p.html

最后发表： 十二门徒
回复内容：
我新买的显示器带了一条display port的线，请问这是给什么用的？为什么不给配一根HDMI的线呢，纳闷。

最后发表： xblues
回复内容：
随着AM3的全面到来，担当先锋和过渡作用的两款AM2+接口Phenom II X4 940/920处理器也基本完成了历史使命，最终将在今年第四季度退市。
AMD已经通知合作伙伴，这两款处理器本季度末就会不再接受订单，不过之后仍会继续生产并出货，直到年底。
Phenom II X4 940已经被刚刚发布的Phenom II X4 945取代，除接口不同外二者规格完全一致，唯一可惜的就是后者锁定了倍频，不再是自由的黑盒版，毕竟它上边就是Phenom II X4 955 BE。
Phenom II X4 920对应的AM3版本则是Phenom II X4 925，同样是2.8GHz，近期就会推出。
最后预告一下，AMD今天将推出两款重要新品，一是首款40nm工艺桌面显卡RV740 Radeon HD 4770，二是新的K10架构双核心Athlon X2 7850 BE。由于Athlon X2 7750刚刚被破解成四核心而再度掀起轩然大波，相信其继任者势必会吸引更多关注。

最后发表： xblues
回复内容：

最后发表： xblues
回复内容：
2、在多核心和多路处理器系统上改进RAR压缩速度，在Windows Vista/7系统下尤为明显。
3、设置对话框－压缩标签页的“从压缩路径移除重复的文件夹”改为更通用的“从压缩路径移除多余的文件夹”。这样一来，如果使用右键菜单的“解压缩到XXX”命令解压压缩包，而且压缩包根目录只包含一个文件夹且没有文件，就不会再压缩路径里产生基于压缩包文件名的多余文件夹了。

最后发表： xblues
回复内容：
谁有没有下来一个RC版本，撞上来看看，感觉应该很稳定，虽然是试用版，但是有那么长时间的试用期，应该还不错。当我买了新机器，装一个试验一下。

最后发表： ubuntuhk
回复内容：
不知道写满一张光盘要花几天时间

最后发表： lertoo
回复内容：
discussions: http://forums.whirlpool.net.au/forum-threads.cfm?f=123
price: http://www.staticice.com.au

最后发表： yuba
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可能是这样的

但不知道td上的4g比wcdma的3g慢多少？

最后发表： 男咕噜
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估计能卖个好价

最后发表： az246806
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个人喜欢二战背景的，不喜欢现代战争
这也是我喜欢5的一个原因之一，呵呵

最后发表： sliuhao
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html 一般都不是wellfrom的，先用tidy formate 然后你可以用XML来取
或者你有pattern,直接用regex来取.........................

最后发表： qian403
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我很脱节了，彻底不懂。加分鼓励NEWGAY吧！
BTW，NEWGAY，怎么去搞PHP了？

最后发表： 8戒
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谢谢，我在悉尼，MS楼上的兄弟和我不在一个城市。

[ 本帖最后由 8戒 于 30-4-2009 17:46 编辑 ]

最后发表： zxwslw
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新下载了一个新版的MSN9。0，却发现怎么也登陆不上去，用旧版的没问题，不是说旧版的要废除，不可以用了么，可是新的又上不去，什么原因呢？

最后发表： black_zerg
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我很喜欢netbean and glassfish，这几年的成长也有目共睹，就是不知道以后前景如何啊，感觉还是不如eclipse被支持的广

最后发表： xblues
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最后发表： gzteach
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去淘一台apple IMAC G5 17"，装个最新版的Leopard，基本不会中病毒，还有超强的家长管理功能，而且还装不了很多的游戏。

最后发表： 周星星1832
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看了3个星期的代码了，准备写点心得了。先顶上来，慢慢写

最后发表： media000
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帮你顶

最后发表： 小河
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谢谢Beckyzhou的连接，但是叫价好贵哦。。

看来我也要DIY做一个了。。。

让我想想。。找只长袜子，里面塞点泡沫。。。。

最后发表： coredump
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如果讨论的人足够多，我们可以把软件做成大版，.NET, JAVA, C++, Database, Network, OS等做成子版。关键是得足够热闹，现在咱们人气还是严重不足啊  请大家多多捧场。

最后发表： zhaizibo1990
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那到底电脑是在哪买比较合算呢

最后发表： chenyi1976
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居然没有多人模式，也太不思进取了吧。

一代就是因为在线模式，被我卖掉的。。。留着实在没有可重复性。

这游戏1代一开始我觉得是神作，但是可重复性真的很差，而且走的又是无分支的风格。希望2代能够有所进步。不过入手是必然的。

最后发表： lilychen
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有几张TOYS R US 的5刀游戏软件代用券(一次只能用一张),免费赠送,需要者请发贴.

最后发表： freeman1stcn
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我住在reservoir想收看数字电视 但是无论是室外和室内信号都很不好 只有SBS是清晰的 其他ABC什么的都不成 请问大家有着方面经验么

最后发表： hidec
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[ 本帖最后由 hidec 于 25-4-2009 20:17 编辑 ]

最后发表： yuba
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asus?

最后发表： Fernando
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现在视频越来越清晰，DIY的质量能保证么？
我手里有个800×600的投影，看看片子还不错