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-   -   Do 9800GTX share the same clock speed increments as 8800 Series? (http://www.hardwarecanucks.com/forum/video-cards/6298-do-9800gtx-share-same-clock-speed-increments-8800-series.html)

bushwickbill April 28, 2008 07:06 PM

Do 9800GTX share the same clock speed increments as 8800 Series?
If you read this thread from here from a while ago it states that the 8800 series GPU clock actually raises in increments rather than every 1MHZ. So does the 9800 GTX share the same increments??
I just got my 9800GTX and want to jump into Overclocking it but would like to know when the Clocks for the Core/Shader/Mem jump to the next increment?
Does anybody know for sure when the Clocks make their jumps?

Keir April 28, 2008 07:36 PM

Just do it and find out? I think Riva tuner lets me set 1mhz increments I've never verfied that with the actual core speed though.

Lemme check

ok from 675 I got 678.86 as the next jump up, and I had to set 680 to get that. Hope that helps.

bushwickbill April 28, 2008 07:44 PM

I was just wondering if anyone had a full table for all clocks for when they jump. I guess I find out for myself. I'll post it when I know.

3oh6 April 28, 2008 08:03 PM

no one has made a table yet that i have seen, and i doubt anyone will, but they do jump in increments. you can set 1MHz increments in RivaTuner and in GPU-Z they show up as what you set...but if you use the RivaTuner monitor, it will show you the actual changes in frequency.

bushwickbill April 28, 2008 08:49 PM

I wish I had the time to make a proper chart showing all the jumps. It will prolly take me a week to get it done.
BTW, GPU's don't need a break-in period do they? Is it alright to just go for the gold right out of the box and try for max speed??
I hit 704/1782/2200 No problem on just a quick check. I really like the Auto fan on this GTX. It is very responsive to temps. Goes up and keeps adjusting itself according to temps. When I set the Fan to 90% my Temps dropped to 40C!!!!!! Very nice and cool. can't wait to max this puppy out and see what she has.

3oh6 April 28, 2008 08:58 PM

within 10 minutes of firing up my 9800GTXs up i had each one of them over 800MHz. stock coolers set to 100% and no volt mods, they all ran 820MHz~830MHz stable for benching. so yeah, should have a good bit more in it.

obviously there is the risk of damage when pushing anything so go slow, take your time, and keep an eye on temps. also, if you set the fan to 100% and during benching the fan speed drops to 35%, don't be alarmed. this is a problem NVIDIA hasn't been able to fix yet. basically, when the card reaches 60C or around there, the fan kicks down. this might just be happening in SLI though, not sure.

Keir April 29, 2008 07:00 AM

No it happens all the time. Oddly if you dont set 100, say like 60, I can get it to idle at 47deg.

3oh6 April 29, 2008 07:27 AM


Originally Posted by Keir (Post 54706)
No it happens all the time. Oddly if you dont set 100, say like 60, I can get it to idle at 47deg.

yeah i shouldn't have said manually set to 100%, it will do it no matter what the fan speed is set to. kind of a hassle as there is plenty left in these cards for benching with just the stock cooler...if the fan speed would stick. even with volt mods, the stock cooler holds its own. i can bench at 870MHz on all cards with vGPU up to 1.35v...but temps make the fan kick out in 03/05/06...01 is still easily benchable.

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