Lag issues after 7900GT voltmod

[Boosted420a]

I got mine to go 690/1700 using 1.5v. Benchmark scores were all great, but I noticed a lot of sections where it would slow down alot, like lag or something. I tried 1.4v and got it up to 650/1700 easisly, and again scores were good, but still some slowdown/lag areas. Running it at 600/1500 seems to be the best overall performance, as in no slowdowns and very fluid graphics. It may be heat related, but temps were in the mid 60's at the hottest point, which was normal for my card with the stock cooler and stock settings.

 

Not sure If i'm going to do the voltmod to the mem, I seen a pic of that mod gone wrong. LOL

 

Has anyone else notice this type of slowdown/lag? Could it be driver related?

 

Also I just thought of this.. Could it be the geometric clock? Like a sync problem? And would possibly making it larger, or getting rid of it make it better?

[Redbeaver]

odd...but ive heard similar cases....

 

try different drivers..... and is the slowdown on certain games, or any games?

 

try setting the same refresh rate as ur default desktop.

 

try turning v-sync permanently off.

 

and last but not least... could it be thx to ur cpu and gpu ur setting the graphic settings way high and ur 1gb of memory is lagging...?

[ViperJohn]

I got mine to go 690/1700 using 1.5v. Benchmark scores were all great, but I noticed a lot of sections where it would slow down alot, like lag or something. I tried 1.4v and got it up to 650/1700 easisly, and again scores were good, but still some slowdown/lag areas. Running it at 600/1500 seems to be the best overall performance, as in no slowdowns and very fluid graphics. It may be heat related, but temps were in the mid 60's at the hottest point, which was normal for my card with the stock cooler and stock settings.

 

Not sure If i'm going to do the voltmod to the mem, I seen a pic of that mod gone wrong. LOL

 

Has anyone else notice this type of slowdown/lag? Could it be driver related?

 

Also I just thought of this.. Could it be the geometric clock? Like a sync problem? And would possibly making it larger, or getting rid of it make it better?

 

There are MANY things that can cause a loss of frame rate and appearent slowdown or stall while

3D benchmarking or gaming but volt mods is not one of them. You could be pushing the clocks to

high causing the core to go unstable/toss cookies (that you may not be able to see as visible artifacts).

The drivers will detect that and throttle the cards clocks but that will nomally only happen once and it

will be an actual complete stall for several seconds while the drivers reset the card with the throttled

clock speeds.

 

If you are seeing repeated slowdowns/speedups look for something repeatedly stealing/hogging CPU

cycles or disk accesses while benchmarking/gaming.

 

Viper

[A6437]

yeah what he said that might be it the clocking to high and not really stable cus that goes on with my cards if i try to go to like 550 on the core. Right now my sig says 490 but i have a delta of 40 so technically in game or on a bench the cards are runng at around 530 but when i try to get over 545 my benchies go to . and so do framerates

[Boosted420a]

There are MANY things that can cause a loss of frame rate and appearent slowdown or stall while

3D benchmarking or gaming but volt mods is not one of them. You could be pushing the clocks to

high causing the core to go unstable/toss cookies (that you may not be able to see as visible artifacts).

The drivers will detect that and throttle the cards clocks but that will nomally only happen once and it

will be an actual complete stall for several seconds while the drivers reset the card with the throttled

clock speeds.

 

If you are seeing repeated slowdowns/speedups look for something repeatedly stealing/hogging CPU

cycles or disk accesses while benchmarking/gaming.

 

Viper

 

 

First, thx guys for the replies.

 

The throttle issue you mention about it will stall for a few seconds... Happens occasionally even at stock speed, no volt mod. wasn't quite sure what it was. I thought because maybe I was using a res hack for alot of my games, that may be an issue, but after it happened game continued normally and there was no noticable loss in framerates. Was never quite sure what caused it.

 

When the card is clocked to say 690/1700+ it benches very nicely, but there are sections of slowdown/lag. On the positive side, there is absolutely no artifacts during the bench marks. I know AquaMark 3 is dated, but it just flies through it and there is no slowdown/lag. Seems I have the most trouble on 3Dmark06.

 

 

odd...but ive heard similar cases....

 

try different drivers..... and is the slowdown on certain games, or any games?

 

try setting the same refresh rate as ur default desktop.

 

try turning v-sync permanently off.

 

and last but not least... could it be thx to ur cpu and gpu ur setting the graphic settings way high and ur 1gb of memory is lagging...?

 

Seems the game I have the most trouble with is Need For Speed Underground 2. I do alot of drag racing with my bud's on Hamachi and one track in particular is terrible, Tunnel Rev. It lags so bad at the start, there's no way I have a chance, even against a noob.

 

I've tried both ways with v-sync. On, Off, it doesnt matter.

 

Refresh is set the same. I may go back and try a different driver. I'm using the 91.31e from tweaksrus.com.

 

About the RAM, excellent thought, but I have no way of testing that theory out, unfortunately.

[Boosted420a]

Oh yeah, I almost forgot, When I have it set to 600/1500, Everything runs great. Doesn't matter what voltage its at. Seems to be the sweet spot. Now, if I just raise the GPU buy 10mhz, lag starts, but not as bad. So I set it back to 600, and raise the ram to 760(1520), lag starts again. It almost seems like theres a particular ratio the gpu need to be to the mem.

[Boosted420a]

I tried a few drivers. That's not the issue. I went and modded a bios, and took off the delta clock. It was at 20mhz. Now, I have gone up to 650(only 1.4V) on the gpu and no lag, but if I touch the mem, it all goes to $#@!.

[Redbeaver]

then im afraid it might be the Samsung modules on ur 7900s is crapping out.... id say just stay away from mem oc for now and just bump the core out.... mem can stay.....

[Boosted420a]

then im afraid it might be the Samsung modules on ur 7900s is crapping out.... id say just stay away from mem oc for now and just bump the core out.... mem can stay.....

 

Well, I thought that at 1st, but when I down clocked the gpu to 550, and set the ram to 850, it runs flawlessly. So now i'm really scrathing my head. Seems to be a bottleneck somewhere. Changing the CPU speed seems to have little to no effect on the lag. Running stock at 2.0ghz, or even up to 2.8ghz its all the same. The theory of my pc ram being not enough just may be the factor, but again, no way to test it. What I did do though was take a stick of ram out, so its running 512mb now, to see if the lag gets worse, but there is no change at the same settings. Lag is still the same.