1.07 GPU Core 开始支持NVIDIA多显卡

privater

简单翻译下：
现在1.07核心可以支持NVIDIA多显卡并行。
看来单机PPD有望突破1w5了，估计能看见国外的新式彪分农场使用 9800GX2 Quad-SLI、GTX280 Tri-SLI...
Subject says it all... I've just been given clearance to spill the beans...

But some caveats upfront..

1. Device 0 *must* be a supported CUDA and DirectX display device. It's a client quirk, and there is a workaround in development, but for now, those are the rules.
1. 第一个设备必须支持CUDA和DX显示，这是开发问题，暂时这样

2. If all your GPUs are CUDA devices and they are all extended onto the desktop, you can just use -gpu n where n is the display device number and it will work just like an ATI client, which means follow the ATI multi-GPU FAQ and you'll be folding away.
2.如果所有的GPU都支持CUDA，那么使用-gpu n参数就可以指定使用哪一快显卡，类似于ATI多显卡支持，参考ATI多GPU支持FAQ

3. In the event that 2 above is not the case, there is an override. Skip the -gpu flag and instead set the environment variable NV_FAH_DEVICE=n where n is the CUDA device you wish to use. You may find yourself also playing with CPU affinity here to get the right mix, but that's why we provided the power tools here so to speak. And also it provides a way for anyone with a tesla server/board out there to run F@H today.

3. set VAR=value is the proper syntax. If you put spaces in this, it won't work, i.e. set VAR = value is incorrect.

4. You need to set these variables either in a script that launches the client, or before you launch the client. Doing so after starting the client will have no effect until it is stopped and restarted.

I'm sure we're about to see some quirkiness, but that's what betas are all about... Have fun!

已经有人测试其性能：
配置: DFI 680i SLI, Q6600 @ 3.6GHz, Reaper 900MHz @ 3-4-4-10-1T, 2x 8800GTS 512MB @ 800/2000/2100
Sys: WinXPsp3, GeForce 177.39, SMP 5.92 core 1.76, GPU2 6.12b8 core 1.07

First G92 GPU using one CPU core folding project 5205 R1 C286 G0 ~6000ppd
Second G92 GPU using one CPU core folding project 5002 R2 C20 G149 ~6500ppd
Only two remaining CPU cores folding project 2665 R3 C824 G23 ~2000ppd

加起来一共14500PPD

附：
ATI-GPU Client FAQ  http://folding.stanford.edu/English/FAQ-ATI

[ 本帖最后由 privater 于 2008-7-2 09:59 编辑 ]

涼宮ハルヒ

是否要求强制开启SLI呢？还是硬件管理器里认出的显卡就OK呢。。
如果是后者的话。。680I上插3块98GX2，那不就有3W6的PPD了么。。。。

privater

应该与SLI无关，Cuda只需要区别出来两块显卡就行了。
但是谁会在不支持SLI的主板上安装两个NVIDIA的显卡呢，除非是新旧显卡都用上，9800GTX+8600GT也许不错...
看网上回馈了

涼宮ハルヒ

可惜那块8500GT要占双槽，不然就想法插650I第一个1X上试试了。。。。。。

Bismarck

支持x64系统么？

Bismarck

原帖由 涼宮ハルヒ 于 2008-7-2 10:47 发表
可惜那块8500GT要占双槽，不然就想法插650I第一个1X上试试了。。。。。。

把650i第一个1x槽的尾巴封口处去掉，就可以上显卡了

涼宮ハルヒ

原帖由 Bismarck 于 2008-7-2 11:03 发表

把650i第一个1x槽的尾巴封口处去掉，就可以上显卡了

这个知道，只是风扇和挡板要占双槽，没法插

花泥

9800GX2 可以4卡SLI？

avin550

电费不要钱么....公益事业也要量力而行哦

花泥

谁送我两块9800GX2，我来买主板24小时刷，电费不要紧

avin550

楼上的估计都用的是公家的电吧

花泥

不是，自己的电，

zglloo

不知道最多支持几路显卡
四路我觉得已经很耗电了

[ 本帖最后由 zglloo 于 2008-7-5 15:27 编辑 ]

moving

不知道现在GPU的运算量占FAH总计算量的多少了。

vmzy

914/2556=35.76%
数据来源：
http://fah-web.stanford.edu/cgi-bin/main.py?qtype=osstats