GTX 260 low frames in older games

[antonusklesk]

My 260 runs everything I throw at it brilliantly well and I can't fault it, but the problem I'm having is I need it to run older/less taxing engines better than it does.

The reason for this is I'm doing my final uni project on GPU rendering speed and one of the benchmarks I need to run is a simple XNA renderer I made. On my 8800GT that the 260 replaced this ran at 100fps on average, but on the 260 it runs at a rock solid 58 :/

I've forced 3d clocks (705 linked) and disabled the low-power downclocking but nothing makes a difference.

Similarly Quake 2 runs at a solid 80fps and the Nvidia 3D settings spinning logo runs at exactly 32! :/

The strange thing is if I move a seperate window around the screen while the 3D is still being displayed the frames shoot up irradically and fall back to the exact value when I stop.

Anyone have any ideas why this is? I presume it's the way the GT200's are designed, but a way to force them to their full potential on untaxing engines is what I'm after, don't wanna have to use my 8800 for it instead of the 260

 

[subbytna]

I've the same problem. I installed Populous the Beginning game (old retro classic) and I'm getting broken pixelated characters....pretty poor show and I'll be damed if I don't know how to fix it

 

[jvowles]

i have seen a similar issue with my 280...no fix though

 

[arc@css]

Think this goes for all cards, either ati or nvidia. Old software with modern hardware confliction.

 

[Rroff]

I don't have this problem with my 260 Q2 runs at silly high FPS and my own game engine thats using DX7 avgs 800 or so.

BTW there is a cvar for Q2 that forces Q2 to I think 80fps for online games as network and rendering are linked and high fps would flood you out.

For quake 2: cl_maxfps (defaults to 90 but due to rounding limits to 82 ingame) - set this to any number (don't set 0 for unlimited as it will stupidly limit to 0 fps locking the game). I don't advise setting too high tho as on a 260GTX Q2 can run 3000+ fps easy which isn't too good for a GPU - capacitors can start whistling and in rare cases if the card is faulty pop.

 

[Blackwhite]

Check guys your drivers settings - set vertical sync at "off" or "use global settings".

 

[antonusklesk]

Hmm, strange that some have the issue and others like Rroff don't.

Perhaps it's something in the drivers / DirectX / OS.

I've tried forcing vsync off too, was the first thing I tried, my assumption is that it's a safety mechanism to prevent ultra high output of frames to prevent capacitor overload (as suggested).

Kinda throws my dissertation out the window though lol, either gotta override it somehow or whack the 8800 back in.

 

[Ian Evey]

?

Do you think it could be using 2d clock speed instead of 3d clock speed, i know in windows ( xp anyway ) it downclocks the card automatically to save power, Maybe forcing the 2d / 3d clocks manually will help ?

Just a thought.

Ian