Cant seem to OC this x1950pro

blindartist · December 16th, 2007, 04:29 PM

Everytime i try to OC this sapphire x1950pro agp, it just wont work, ive tried with CCC and rivatuner, the test passes but when i go to run a game i get some colorful sqwigly lines and all freezes up, this is extreamly annoying, anyone have any ideas?

Thanks guys

gen.Rage1991hrv · December 16th, 2007, 04:30 PM

heheheheh card is over heating get a proper cooling (add beter cooler like zalman vf900 or add some fans)

blindartist · December 16th, 2007, 05:27 PM

ah it has nothing to do with heat, she doesnt go past 70 at max load and these things can go much higher then that before it even forces core slowdown (oh and i have 2 80mm intakes, 1 120mm exaust plust the cpu, vid card and the psu has internal exaust as well so its definetly not heat)

I just dont think the memory is very oc'able on these cards, i played with it and i got it stable at 621 core and 750memory, it was the mem clock that was making it screw up but the core you can take pretty high

gen.Rage1991hrv · December 16th, 2007, 05:33 PM

than do some work on the vga bios and set better latency there and maybe you will make it run better on high clocks
and i think that there you can set up voltages for ddr and core

Mac Daddy · December 16th, 2007, 05:56 PM

Quote:

Originally Posted by blindartist

ah it has nothing to do with heat, she doesnt go past 70 at max load and these things can go much higher then that before it even forces core slowdown (oh and i have 2 80mm intakes, 1 120mm exaust plust the cpu, vid card and the psu has internal exaust as well so its definetly not heat)

I just dont think the memory is very oc'able on these cards, i played with it and i got it stable at 621 core and 750memory, it was the mem clock that was making it screw up but the core you can take pretty high

Actually its the reverse the GPU very sensitive to O/Cing and the Ram clocks more easily.

I am stable running at 654 / 762 @ 48 degrees under heavy load and ambient 38. But keep in mind I am running an Accelero S1 cooler. The stock Sapphire heatsink and fan is known not to be good for O/Cing. I wouldn't suggest going much over 600 on your core and 720 on your ram without better cooling

blindartist · December 16th, 2007, 09:08 PM

Quote:

Originally Posted by Mac Daddy

Actually its the reverse the GPU very sensitive to O/Cing and the Ram clocks more easily.

I am stable running at 654 / 762 @ 48 degrees under heavy load and ambient 38. But keep in mind I am running an Accelero S1 cooler. The stock Sapphire heatsink and fan is known not to be good for O/Cing. I wouldn't suggest going much over 600 on your core and 720 on your ram without better cooling

I think there was a revision done of the saphire because the one i have doesnt have the same heatsink that you see in the reviews, on mine the fan is on the other side of the card and bigger with a transucent blue casing, it works well enough, these things can handle 100+C before they even slow the core down so no big deal, and it doesnt seem to be the case with the ram, the ram seems to be more sensitive to the OC then the gpu, ive no problem with the gpu oc, can max that out but the ram once i break about 755 it screws up

Mac Daddy · December 16th, 2007, 10:44 PM

Quote:

Originally Posted by blindartist

I think there was a revision done of the saphire because the one i have doesnt have the same heatsink that you see in the reviews, on mine the fan is on the other side of the card and bigger with a transucent blue casing, it works well enough, these things can handle 100+C before they even slow the core down so no big deal, and it doesnt seem to be the case with the ram, the ram seems to be more sensitive to the OC then the gpu, ive no problem with the gpu oc, can max that out but the ram once i break about 755 it screws up

Interesting do you have a link or can you take a pic of it for me ? Cooling has become a new hobby for me and any revisions I would like to see. The poor cooling on the AGP and PCI-E versions of the X1950 Pro in genaral are the reason Powercolor started using the Accelero X2 designed by Arctic Cooling as a stock cooler.

|- Welcome to the PowerColor World -|

And remember temp isn't everything its also latency as GenRage mentioned. I have used the one version of ATI tool I "kinda" got to work on this card to GPU speeds over 1000 @ under 60 degrees on the auto detect max GPU speed tab .... 1200 on ram before artifacts were reported .... BUT !!

Using those settings in real applications would slow proper communication and data transfer between the GPU and memory thats latency without it speed and temps mean nothing. When you reach a setting that starts to show artifacts back it off a few percent and ya know what ? I bet your perfomance and scores are better than the higher setting because the card is operating properly.

Anyway all my input for now good luck and have fun Bro thats what its all about

IModIntel · December 16th, 2007, 10:57 PM

You might not need to change to a better cooler but I would definitely recommend that you cool the HSI (Rialto) chip at the back of the card. Much of the instability is due to this in my opinion.

Mac Daddy · December 16th, 2007, 11:13 PM

Quote:

Originally Posted by IModIntel

You might not need to change to a better cooler but I would definitely recommend that you cool the HSI (Rialto) chip at the back of the card. Much of the instability is due to this in my opinion.

Backside cooling is very important with this card I have found the back of the card opposite the GPU is almost red hot at times even with my cooler.

There are rear coolers available for 8800 cards haven't seen any for X1950 .. but for me just using case flow to make sure the rear of the card has proper airflow

Dyre Straits · December 17th, 2007, 08:49 AM

I've found that both X1950s I've had are very difficult to OC much at all. Even the PowerColor with the Arturo II cooler running at 100% wouldn't let me get much OC out of it.

EDIT/UPDATE:

I just decided to run some more tests on my X1950 Pro PCIe card. I've got a ZeroTherm cooler on it and decide to try again to see just how far I could push it before getting artifacts.

Well, take a look at the images attached. Even though the temps never got over 34C during testing, I still couldn't push the card over 621/742. This is using the ATI CCC.

I have my Core 2 Duo E6700 (2.66 GHz) running at 3.2 GHz. My DDR2 RAM is running @ 1066 MHz/6.6.6.20/2T.

I've been in a little 'contest' with my brother and a brother-in-law using 3DMark 2001.

So far, I'm quite a bit ahead of them.

I'm about to run some 3DMark 2K3 to get back on track with this thread.

BTW: The second image attached will show the default speeds once the 3D app is stopped. Never fear, the card was running OC'd during the benchmark.