7900GT Overclocking...

PsYkHoTiK · 20th Mar 2006, 02:25 PM

I bought an XFX 7900GT (520/1500) and I'm really happy with it. Performance is SUPERB!

Really great value for the price I paid for it.

This card comes with the Samsung k4j55323qg-bc14 GDDR3 chip (1.4ns) that is supposed to run at 700MHz/1400MHz effective.
http://www.samsung.com/Products/Semi...K4J55323QG.htm
However, XFX has them running at 750MHz/1500MHz effective.

Anyways, I started overclocking it and when I started raising the ram, it seemed like it just wouldn't stop going...

At first I thought coolbits wasn't working or something but SysTool showed that the clocks were real. Well just look at what I've got. Now do keep in mind that there is nothing on the ram chips at all. It's on stock cooling and unmodded in any way shape or form. I will probably be able to push it higher with better cooling.

The OC at the end of the day was 590MHz core 870/1740MHz ram. This is a stable OC (no artifacts or anything - tested by looping a variety of games.) I could go higher but I would get heat artifacts on the core and slight artifacts and mis rendering on the ram.)

Note: 3dmark06 wouldn't run at any setting. Crashes on the HDR tests. Must be driver problems or something.

Continental · 20th Mar 2006, 10:48 PM

I've got myself a 7900GT factory o/c'd by Leadtek, it runs at 525/1430 out of the box, haven't checked for the type and latency of memory chips, actually haven't gotten around to O/C yet. However, I've got one q'--what are the temps like at that stable o/c you've achieved? Also--what drivers are you running? Have you tried 82.41 yet? I'm still running it on Leadtek drivers myself.

PsYkHoTiK · 21st Mar 2006, 12:02 AM

I'm running on the 84.21 drivers. Temps are pretty low. I don't have an exact number on the overclocked but its idling at 43C right now.

Welcome to ARP forums btw....

Continental · 21st Mar 2006, 12:23 AM

Thanks for the welcome

. Mine's idling at 48-51 C, depending on the ambient temperature, I don't know what it does under load, I guess RivaTuner could help there. Next step--82.41, check what it does.

I'm more interested in stability than top performance, but I bought the oc'd version because it was the single 7900GT available in this country

. So far it's been rock solid. Only mod I'm planning is to stick an Arctic Cooler on it ASAP, the stock one cools well, but it's rather noisy on full RPM.

PsYkHoTiK · 21st Mar 2006, 01:20 AM

Yea, I need to get better cooling for this card.

It runs really cool and stuff but the heatsink is too small for my taste..

It's an awesome performer.

The current RivaTuner doesnt recognize the 84.21 drivers yet.

PsYkHoTiK · 2nd May 2006, 01:49 PM

Ok, I just picked up a Zalman VF900 and we'll see what I can get outta it. May think of some vmods as well.

I will be interested in not only the OCing of this card but the difference in benching with the TCCDs and the UTTs (if I can get past the cold boot lololol

)....

Chai · 2nd May 2006, 08:07 PM

Quote:

Originally Posted by PsYkHoTiK

Ok, I just picked up a Zalman VF900 and we'll see what I can get outta it. May think of some vmods as well.

I will be interested in not only the OCing of this card but the difference in benching with the TCCDs and the UTTs (if I can get past the cold boot lololol

)....

VF900 is not good enough to handle vmods...

PsYkHoTiK · 2nd May 2006, 08:33 PM

Quote:

Originally Posted by Chai

VF900 is not good enough to handle vmods...

With some "assistance" it should do ok...

Plus I'm not gonna do major vmods (couldn't solder if my life depended on it.)

Papercut · 2nd May 2006, 08:41 PM

Isn't 7900GT vmod the one that involves drawing a conductive line between 2 points on the PCB? Or am I confusing it with some other card...
If it is then that should be fairly simple, even I would be game enough to do it

Adrian Wong · 2nd May 2006, 10:33 PM

Quote:

Originally Posted by PsYkHoTiK

With some "assistance" it should do ok...

Plus I'm not gonna do major vmods (couldn't solder if my life depended on it.)

Hahaha.. I like the way you think.

With some assistance!

21st Mar 2006, 12:02 AM	#3 (permalink)
PsYkHoTiK "Little" Devil Join Date: 8 Apr 2004 Location: On the "throne" Posts: 14,166 Reputation: 3858 Rep Power: 57	I'm running on the 84.21 drivers. Temps are pretty low. I don't have an exact number on the overclocked but its idling at 43C right now. Welcome to ARP forums btw.... __________________ Intel SLAPL 4.3GHz @ 1.35v WIP : 2x2GB OCZ Platinum DDR2 1066 : Asus P5K Premium : WD Raptor X : G92 8800GTS 512mb stock : XFi Platinum : Silverstone OP650 : Silverstone TJ-07 : Vista Ultimate Edition : Dtek FuZion CPU : Swiftech MCW60 : MCP655 : Thermochill PA120.3 w Scythe Ultra Kaze : Tygon R3603 1/2" ID 3/4" OD CPU-Z: SLAPL : SLA9U : FX-55 : DDR 600 : VX www.techarp.com

21st Mar 2006, 01:20 AM	#5 (permalink)
PsYkHoTiK "Little" Devil Join Date: 8 Apr 2004 Location: On the "throne" Posts: 14,166 Reputation: 3858 Rep Power: 57	Yea, I need to get better cooling for this card. It runs really cool and stuff but the heatsink is too small for my taste.. It's an awesome performer. The current RivaTuner doesnt recognize the 84.21 drivers yet. __________________ Intel SLAPL 4.3GHz @ 1.35v WIP : 2x2GB OCZ Platinum DDR2 1066 : Asus P5K Premium : WD Raptor X : G92 8800GTS 512mb stock : XFi Platinum : Silverstone OP650 : Silverstone TJ-07 : Vista Ultimate Edition : Dtek FuZion CPU : Swiftech MCW60 : MCP655 : Thermochill PA120.3 w Scythe Ultra Kaze : Tygon R3603 1/2" ID 3/4" OD CPU-Z: SLAPL : SLA9U : FX-55 : DDR 600 : VX www.techarp.com

2nd May 2006, 01:49 PM	#6 (permalink)
PsYkHoTiK "Little" Devil Join Date: 8 Apr 2004 Location: On the "throne" Posts: 14,166 Reputation: 3858 Rep Power: 57	Ok, I just picked up a Zalman VF900 and we'll see what I can get outta it. May think of some vmods as well. I will be interested in not only the OCing of this card but the difference in benching with the TCCDs and the UTTs (if I can get past the cold boot lololol ).... __________________ Intel SLAPL 4.3GHz @ 1.35v WIP : 2x2GB OCZ Platinum DDR2 1066 : Asus P5K Premium : WD Raptor X : G92 8800GTS 512mb stock : XFi Platinum : Silverstone OP650 : Silverstone TJ-07 : Vista Ultimate Edition : Dtek FuZion CPU : Swiftech MCW60 : MCP655 : Thermochill PA120.3 w Scythe Ultra Kaze : Tygon R3603 1/2" ID 3/4" OD CPU-Z: SLAPL : SLA9U : FX-55 : DDR 600 : VX www.techarp.com

2nd May 2006, 08:41 PM	#9 (permalink)
Papercut Hyperactive Join Date: 14 Jul 2004 Location: Singapore! Posts: 4,947 Reputation: 2405 Rep Power: 33	Isn't 7900GT vmod the one that involves drawing a conductive line between 2 points on the PCB? Or am I confusing it with some other card... If it is then that should be fairly simple, even I would be game enough to do it __________________ PC Specs "Use in a cool dry place away from direct sunlight. Keep out of reach of n00bs. Overclock within 24 hours of opening. Do not read instructions before proceeding, do not use only as directed. May cause frustration, late nights and empty wallets. If symptoms persist please consult your hardware professional."

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20th Mar 2006, 10:48 PM	#2 (permalink)
Continental Newbie Join Date: 20 Mar 2006 Posts: 2 Reputation: 0 Rep Power: 0	I've got myself a 7900GT factory o/c'd by Leadtek, it runs at 525/1430 out of the box, haven't checked for the type and latency of memory chips, actually haven't gotten around to O/C yet. However, I've got one q'--what are the temps like at that stable o/c you've achieved? Also--what drivers are you running? Have you tried 82.41 yet? I'm still running it on Leadtek drivers myself.

21st Mar 2006, 12:23 AM	#4 (permalink)
Continental Newbie Join Date: 20 Mar 2006 Posts: 2 Reputation: 0 Rep Power: 0	Thanks for the welcome . Mine's idling at 48-51 C, depending on the ambient temperature, I don't know what it does under load, I guess RivaTuner could help there. Next step--82.41, check what it does. I'm more interested in stability than top performance, but I bought the oc'd version because it was the single 7900GT available in this country . So far it's been rock solid. Only mod I'm planning is to stick an Arctic Cooler on it ASAP, the stock one cools well, but it's rather noisy on full RPM.