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【转载】G8x支持4颗以上GPU并联http://www.dailytech.com/article.aspx?newsid=5768
The GeForce 7600 and 7300 became readily-available, affordable video cards almost overnight. A major secret to the success of these cards was due to the fact that the GPUs were designed to use the old PCB designs from GeForce 6200 and 6600. Once again, NVIDIA will take advantage of this mentality again with the next generation G86 and G84 video cards scheduled for release this quarter.
Was it surprising that images of the GeForce 8600 that have been "leaked" out to the internet look identical to GeForce 7600s, or for that matter GeForce 6600s? It shouldn't be, as that was sort of the whole point in making G84 and G86 pin compatible with G73, which was already pin compatible with NV40.
G86 and G84 (G8x family) GPUs do have some major differences between G73 however. For starters, the main G73 power rails run at 2.5V -- on the G84/G86 these rails run at 1.2V and 1.8V. The G73 clock generator runs at 1.3V while the G8x family clock generator runs at 3.3V. Additional dead pins have also been allocated on the G8x family for higher density memory.
One of the bigger surprises of the G8x family is the support for more than 4 GPUs, at least in the design. It seems pointless to put a low or mid range GPU into SLI mode when a high-end card can usually produce better performance at lower cost. However, the G8x family design kit touts an interface for "more than 4 GPUs." Given the unified shader architecture of the GeForce 8000 family, it would be pretty safe to say this additional functionality is probably reserved for some sort of physics project.
The G86 and G84 GPUs are expected to launch before Cebit 2007 this March.
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G8x支持4颗以上GPU并联
作者：上方文Q 编辑：上方文Q 2007-1-25 11:44:00
早早发布的GeForce 8800自然属于高端产品，距离普通用户甚为遥远，而即将到来的中低端G86、G84无疑更值得关注。据分析，G86、G84可能会延续G73的PCB设计，而且最令人震惊的是，它们支持4颗以上的GPU并联工作。
GeForce 7600、7300迅速取得成功的秘诀之一就在于这两颗GPU可以用在GeForce 6600/6200的PCB版上，因此很快做到了低价大量上市；而在G86/G84上，NVIDIA很可能会故技重演，所以此前泄漏的GeForce 8600实物图片看起来很像GeForce 7600也就不足为怪了。当然，图片的真实性还值得商榷。
另外，G73的主要电源线工作在2.5V，而G86/G84是1.2V和1.8V；G73的时钟发生器运行在1.3V，而G8x家族是3.3V；为了支持更高密度的显存，G8x还增加了额外的备用针脚。尽管如此，G86/G84的外部设计与G73比较并无太大区别。
虽然不一定会投入实用，但至少在设计理论上，可以将4颗以上的G86/G84 GPU并联在一个系统中，组成超级Quad SLI。这一点已经在G8x的设计套装中得到确认。当然，用中低端显卡组成SLI一般并不太实惠，因为稍高端的型号往往能在更低价格上取得更高性能，不过既然G8x有这种超级并联能力，再加上整个家族的统一渲染架构，不排除NVIDIA会在特定场合拿出这种恐怖级的联动。要知道，AMD的Quad FX 4×4平台就可以使用4块显卡，如果都是单卡双芯的话……
G86和G84预计会在3月下旬的德国CeBIT 2007大会之前发布，领先AMD-ATI的R600。  |
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原来核电站在此 
那R600 CF是什么？反物质电站？……
我是傻了，我傻到竟然把niwei以为R600比G80更省电都忘了。 
那好吧，我信了，R600不需要外接电源就可以正常工作，niwei满意么？
