Hey guys,

I'm a bit puzzled here and would like to seek help from you experts.

I was using Vista Ultimate when I purchase a GeForce 7900GS 540/700 stock.
RivaTuner shows that it's running 80% fan speed and idle at 41C. (FYI, Vista's AERO activates 3d performance even in idle Windows).

Fast forward till today, I'm using XP due to some licensing issues with Vista. RivaTuner shows 20% fan speed and temp is 50C. Messing around with fan speed from RT doesnt seem to work. When loading 3d graphics, fan speed will increse to 80% automatically. I have totally zero control over the fan speed. Is it a product defect or what?

Then, I increased the speed to 565/730 and ran 3dMark06. I was experiencing laggy screens (like the screen will freeze for a second before continues) throughout the whole benchmark test. The test result was lower than my stock speeds. Any idea why?

FYI, I'm using;
CM Extreme power 430W
Gigabyte GA-8I945PL-G
2GB KVR 533
Galaxy Geforce 7900GS 512MB
Pentium D 3.0 (CPU speed was at stock when the above test was performed. So, I'm pretty sure i got enuff power supplied from PSU)

Pls help..... thx

Overheating GPU core and not enough memory voltage will result in freezing the 3DMark. Just one thing to know, will the fan runs at 80% when you runs 3DMark? Try reinstall RT with the latest version and try again. Oh yea, what's the driver version you have installed? Can try the newest from nVIDIA website.

Fan runs at 80% during 3dmark.
Am already using latest drive from nvidia and RT FR2.0

add to that...
@TS
it's obviously your GPU core's trying lowering your overclocked core to safer clock even it 560MHz isn't high enough , this is happened on me when i'm on 7300GT , it stated that, your GPU overheat

Here's how. Try runs 3DMark on all default settings, everything,m CPU, RAM, VGA and see how it goes.

Is it a new card you just bought? And spare card you can test? If your current 7900GS even with default settings still experience freeze and other cards won't, high possibility that the 7900GS is abit faulty, could be memory.

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Added on May 7, 2007, 12:02 pmBTW, download ATITool and have your card run the scanning artifact test, monitor the GPU temp.

This post has been edited by Hyde`fK: May 7 2007, 12:02 PM

Hmm, I'm not too sure that you have enough power..the CM extreme power DOES put out a full 430W (from a very detailed review by johnnyguru), but a Pentium D 3.0 takes up over 100W even at stock speed. 7900GS takes up around 80W+ at stock, I don't know about when its overclocked. Add the rest of the system (another 60-100W) and its already almost 300W at stock. It -might- just go over the top when the 7900 is overclocked, or at the very least the voltages will start to fluctuate more and more.

I don't think it explains why your 3dmark score is lower though; if there isn't enough power it will crash before the benchmark is finished.

The PSU is more than enough to power up the whole system even when overclocked. 3DMark will be lower because of the freeze time, where the fps will be stuck be at very low fps or maybe even zero for a few seconds, thus giving lower score, its normal.

graphic card not receiving enough 'juice' i suppose
when it's overclocked, the overclocked setting is just not stable enough, so the card is de-throttling its clockspeed. that is why you experience lagging during benchmark, which causes low 3dmark score

let's say that it's not receiving enuff juice, how to pump is more oomph to the card? increasing PCI-E voltage from the bios, or pencil-mod or ???

*puzzled*