gpu OC'ing

[Makunouchi]

Hey again,

There doesnt seem to be many guides or much material out there about gpu OC'ing, at least compared to cpu OC'ing. I'm reasonably well versed with cpu OC'ing but have no experience at all with gpu OC'ing, apart from to know its pretty easy to fry the card (or so ive been told), so i dont really know how far you can push certain cards, or which values you can raise the most.

Here is a SS of my efforts after 30 mins or so (after a few screen freezes...). I got these values pretty stable and tested them on a bunch of games, and i'm not getting any artifacts or anything of that nature.

So much questions are mainly, is this likely to be stable on the card i have? and hich value can i most likely push further? And what sort of temps should i be watching out for (how high should i let them go?) gpu temps atm are about 52/53 under 5 mins load.

Any response appreciated.

 

[Goldfingers]

o.k find whoever told you it's' easy to fry the card' and kindly shove a fence post up there rear. The only way it's going to fry is if you don't keep an eye on temps.

The personal method of overclocking GPU's is: Download rivatuner, check you temps and do all overclocking from here. Every time you adjust the values do a run of 3dmark 06, tell tale signs of an unstable over clock are - a lower score, artifacts or crashes. Once it's 3dmark stable start gaming, if you get artifacts or crashes lower the speeds and try again. This method finds your max game stable overclocks.

Method 2 is download ati-tool and check you temps and do overclocking from here. Each time you overclock do the 'fur' test lower speeds if you artifact. This method is quicker but will not find your max game stable overclock, it will find max stable which is a little lower.

As i'm sure you know move is small steps - 10-15mhz on the core, and 20mhz on the memory, and keep gpu temps under 75 C if possible 85-90c being max.

Hope that helps

 

[Makunouchi]

Thanks for the reply. I've been using Rivatuner so far, but it seems i cant actually push those values much higher before i start getting screen freezes, but im not sure which value it is im pushing too far. Can you suggest which one its most likely to be?

 

[Goldfingers]

Thanks for the reply. I've been using Rivatuner so far, but it seems i cant actually push those values much higher before i start getting screen freezes, but im not sure which value it is im pushing too far. Can you suggest which one its most likely to be?

Yeah sure. You have to push each value individually, i'd do the core first. Once you know it's stable push the next, and so on. Little black dots will start appearing if the memory is too high, while more serious artifacts will occur due to the core. Crashes can happen due to pretty much any of the values.

 

[Makunouchi]

Hmmm thanks for your help. After the past hour of playing it seems that gpu's are a lot more flakey than cpu's, and you can't really push them much futher than stock settings, but ill play around a bit more and tell you how it goes, i'll post some 3Dmark results as well once the thing has finish downloading, maybe someone can give me and idea if they are normal or not.

 

[sosrandom]

It depends on the card much like CPU's, the G92 GTS seems to easily overclock from 650 core too 800, and the memory is rated at 1ns(2000) but will overclock to 2200.

Although its harder testing if its stable, I usually run games as well as artifact tests.

 

[Cyber-Mav]

also make sure you do your gpu testing with something like atitool to do artifact scans. atitool version 0.27 beta 4 shoudl work fine on your 8800

 

[Makunouchi]

Well i ran 3Dmark06 with the settings i posted before, and got 10604.

The thing is, during the cpu section i was getting 0-1 fps... Is that normal? my E6600 is running at 3.3GHz.

Comment welcome.

(i also tried running it with stock setting but it wouldnt let me upload it to get the results, does 3Dmark only let you submit 1 result or something unless you register?)

 

[pieman109]

Well i ran 3Dmark06 with the settings i posted before, and got 10604.

The thing is, during the cpu section i was getting 0-1 fps... Is that normal? my E6600 is running at 3.3GHz.

Comment welcome.

(i also tried running it with stock setting but it wouldnt let me upload it to get the results, does 3Dmark only let you submit 1 result or something unless you register?)

Yep thats normal, consider yourself lucky if you ever 2-3 fps

 

[Makunouchi]

It peaked 3 at one point!

 

[deshepherd]

The thing is, during the cpu section i was getting 0-1 fps... Is that normal? my E6600 is running at 3.3GHz.

Comment welcome.

I assume that the CPU section of the test is running all the graphics pipeline on the CPU thus the CPU is having to run the operations that are executed on ~100 pipelines on the gfx card thus is massively slower.

 

[Makunouchi]

Well i've officially given up with GPU overclocking. I cant seem to get any sort of overclock truely stable, and now im getting crashes in games while running stock settings, no idea why thats happening.

Anyway, it seems that you get such a tiny tiny improvement from a lot of time invested compared to what you get from CPU overclocking. Guess i'll just wait for a new NVIDIA card to come out, or if i keep getting these crashes i might have to buy another card earlier than that.