G73JH Question on Overclocking and artifacting...

So I've seen a lot of posts of people having success using Overdrive to push the clocks on the GPU up to 800+/1100 on the GPU. I have a newer G73JH with a good factory paste job (stock clocks don't go above 80 on Furmark extreme burn), so I figure that I'm a good candidate for overclocking.

The problem I have is that while everything runs 100% stable at 800/1100 clocks, Furmark starts artifacting (IE there's flickering and misrendered spots in the graphic output). The temps also even after 5+ minutes of Extreme Burn Furmark never exceed 97 degrees. The problem for me is that the artifacting is distracting and just doesn't look good. Definitely not for the small amount of performance improvement I'd be getting.

I've found running at 750/1050 clocks runs clean without artifacts, so that's what I'm doing. I was just wondering if those of you running higher clocks see these artifacts in Furmark? Also, if it's artifacting in Furmark, does that mean it'll be a problem in other games? I haven't really tested gaming with higher clocks set, I just didn't like what I was seeing in Furmark.

 

You are confusing temperature with overclocking and that is not the case I have temps of 80oC max at extreme burn 17oC lower than you and I normally run at 800/1100 max or 825/1100 at a real push and anything above that will artifact me as well. Temperature does not effect the overclock unless it is so high that it causes the chipset to throttle.

You are restricted by voltage which is hardwired 0.95v and 1.15v without raising the voltage there is not enough power to run the core/memory at higher clocks like the Alienware 5870M many have it running at 1.2v-1.3v and easily push clocks of 900/1200 stable. This does vary from chip to chip though some people are lucky and have a chip which is more tolerent to higher clocks at the same voltage, others dont.

 

So basically if I run at a certain clock and I get artifacting, it's more an issue of the lower voltage not being able to push those clocks reliably?

And I guess some people have cards that can handle higher clocks at the same core voltage? My extreme burn at full resolution and base clocks is only 80 degrees, but pushing the clocks also increases the temp to where with an overclock of 800/1100 it gets to 97 or so after about 5-10 minutes and then stabilizes.

So if I am reading this correctly, you basically want to push your clocks up bit by bit until you start seeing artifacting and then back the clocks down to where things run clean? As mentioned, 750/1050 runs clean for me, but I'd have liked to be able to run higher. With the artifacting though, it just doesn't look good (although it doesn't bluescreen or have stability problems).

 

That, every card overclocks differently. If you want to know more as to why it is that way, you can do a search for CPU binning. The principle is the same for GPUs too but i find it easier to get info on CPU binning.

 

You dont want any artifacts at all because that is showing there is either not enough voltage, too much heat, or the Vram is dying so for the memory to work correctly because of clocks being too high you need to drop them down. I can run at 825/1100 fine but 825/1125 causes artifacts. Although you could get away with only dropping it by 5-10mhz to become stable I normally drop it down to the next round 1/4 number so 25mhz at a time unless im benchmarking.

Try 775/1075 and see if you can find stability there.

 

Ok, thanks for the update... I'm pretty happy with things running at 750/1050, although I haven't tried higher, I just dropped things down when I saw the artifacting. I could probably go a bit higher, but I'm happy with things running stable where they are. I suppose if I had performance issues in a game I could see pushing a little higher, but even The Witcher 2 runs decently on my system.

Thanks again.

 

You should also note that stable GPU OC clocks differ from game to game so when someone tells you that 'so and so clocks are my stable OC clocks' take it with a grain of salt.

I can stably run most games at 810-815/1100 no issues but when I play the Witcher 2 I get artifacts and screen pauses as long as the core clock is over 800 so I have to resort to 790-795/1100 when just playing the witcher. With GTAIV on the other hand, for some ungodly reason will always crash 15-20mins in-game with clocks past 750/1050.

Just because I can play Braid stable with oc clocks of 830/1100 your not gonna hear me say "yep my stable OC clocks are 830/1100"