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help gpl : slower fps with sli mode / 1 voodoo2 !!!

8 posts by 6 people · 17 Oct 1998 - 19 Oct 1998

Rodoge 17 Oct 1998#428223
hi, i just buy a new voodoo2 12 meg to increase fps in gpl with sli mode and gpl become slower than before i had one voodoo2 ? is anybody has the same pb ? if yes, how to solve it ? thanks
John 17 Oct 1998#428224
Have a look at my previous post to get some info on what you should expect. You aren't the first to report this. SLI will help a lot at higher resolutions but ultimately Voodoo 2 will be bottlenecked by your cpu. What is your system and how are you running GPL? >hi, >i just buy a new voodoo2 12 meg to increase fps in gpl with sli mode and gpl >become slower than before i had one voodoo2 ? >is anybody has the same pb ? >if yes, how to solve it ? >thanks
% hi, % i just buy a new voodoo2 12 meg to increase fps in gpl with sli mode and gpl % become slower than before i had one voodoo2 ? % is anybody has the same pb ? % if yes, how to solve it ? In reality, I only thought SLI provides higher resolutions, not really any speed increase. As it is, you are increasing the workload of your CPU and bus by adding the 2nd card. Also, it seems that the clock speed of the Voodoo2's are being reduced somewhat by the current drivers while in SLI mode. -- **************************** Michael E. Carver ************************* Upside out, or inside down...False alarm the only game in town. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=<[ /./. [- < ]>=-=-=-=-=-=-=-=-=-=-=-=-=-=
Rodoge 17 Oct 1998#428226
thanks for your answer. my system is a p2-350 ov 400. since yesterday, i change refresh rate of voodoo2 board (85hz) and put a cross for "don't sync...". it works well but not as i could expect.
John 17 Oct 1998#428227
You probably shouldn't reduce the clock speed to 85. The reference drivers reduce the clock setting by 5Mhz in sli mode to optimise compatibility so your cards are running at 80Mhz. Try 95Mhz which will give you 90. As I've already reported, SLI does work well at high resolutions and graphically intense situations. However, Voodoo 2 cards are reliant on the cpu to deal with some of the rendering and GPL makes VERY high demands for, amongst other things, the AIs. I've found 13 opponents a good compromise in my own >thanks for your answer. >my system is a p2-350 ov 400. >since yesterday, i change refresh rate of voodoo2 board (85hz) and put a cross >for >"don't sync...". >it works well but not as i could expect.
YUBS 18 Oct 1998#428432
All SLI does is split up the work. Instead of one card rendering every line, one card renders the even lines and the other the odd. The reason you can get 1024x768 with SLI is that the cards only need half as much frame buffer since they are only rendering half the screen. I don't think that having two cards would put any more demand on your system (at least none that you'd notice) and they definitely DO help performance (again because they each only have to do half the amount of work). The reason people aren't seeing that much of an performance boost with SLI in GPL is because the cards are cpu limited not fill limited. GPL makes the cpu spend so much time doing the physics and AI that it can't dish out the triangle data quick enough. That means that even if you could render 1 billion pixels/sec it wouldn't matter since you don't have the data that you need to render. -YUBS
Quoted text (17 lines)> % hi, > % i just buy a new voodoo2 12 meg to increase fps in gpl with sli mode and gpl > % become slower than before i had one voodoo2 ? > % is anybody has the same pb ? > % if yes, how to solve it ? > In reality, I only thought SLI provides higher resolutions, not really > any speed increase. As it is, you are increasing the workload of your > CPU and bus by adding the 2nd card. Also, it seems that the clock speed > of the Voodoo2's are being reduced somewhat by the current drivers while > in SLI mode. > -- > **************************** Michael E. Carver ************************* > Upside out, or inside down...False alarm the only game in town. > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=<[ /./. [- < ]>=-=-=-=-=-=-=-=-=-=-=-=-=-=
Joe McGinn 19 Oct 1998#428679
>work). The reason people aren't seeing that much of an performance boost with SLI >in GPL is because the cards are cpu limited not fill limited. GPL makes the cpu >spend so much time doing the physics and AI that it can't dish out the triangle >data quick enough. That means that even if you could render 1 billion pixels/sec >it wouldn't matter since you don't have the data that you need to render. But why would an SLI setup be SLOWER? Joe
Slowhan 19 Oct 1998#428680
how do you overclock your PII 350 to 400 ?? i cannot change the factor? only thing i can do is run it at 112MHz x 3,5 = 392 MHz? -- Surf Usenet at home, on the road, and by email -- always at Talkway. http://www.talkway.com

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