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2900XT Bios Flash Question - Page 2

post #11 of 18
Thread Starter 
Ok, I've upped voltage to 1.25v and cranked the fan speed up somewhat to lower temps until i can get water cooling sorted out - what kind of GPU speed do you think I can hit with 1.25v?
    
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post #12 of 18
Thread Starter 
Well looks like I can't hit any kind of GPU speed with 1.25v! My power supply isn't up to the job obviously, as my computer simply powers down totally after a few minutes of running at 1.25v haha! New PSU - yet another thing to add to the PC shopping list!
    
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post #13 of 18
How many amps does that psu pulls?
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post #14 of 18
Quote:
Originally Posted by mrselfdestruct View Post
Well looks like I can't hit any kind of GPU speed with 1.25v! My power supply isn't up to the job obviously, as my computer simply powers down totally after a few minutes of running at 1.25v haha! New PSU - yet another thing to add to the PC shopping list!
Well, you really shouldn't be playing with increased core voltages with the stock cooling. It's entirely possible your VRM's are over-heating.

BTW, what are your PSU's specs? 2900xt's aren't actually as power hungry as people think...
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post #15 of 18
Thread Starter 
I also edited the fan speeds in the card bios - the cards weren't going over 77c, even if it was noisy. The whole system just turned off. Not sure on how many amps the PSU does... I don't think its a very high quality one...
    
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post #16 of 18
Quote:
Originally Posted by mrselfdestruct View Post
I also edited the fan speeds in the card bios - the cards weren't going over 77c, even if it was noisy. The whole system just turned off. Not sure on how many amps the PSU does... I don't think its a very high quality one...
Well, the core wouldn't be the issue, it would be the the voltage regulators on the end of the card. They tend to get in the mid 80's at stock voltages, let alone higher ones.

Try downloading everest ultimate. It gives VRM temps.
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post #17 of 18
I know these babys pull at less 201w. But I know that amps counts too. That's way I got a PC&C 750 because they pull 60a on a single rail. Was debating to got another hd2900xt to xcross for my new built. But am think going with hd3870.
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Yin
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post #18 of 18
Thread Starter 
I have everest running - just haven't enabled the VRM temp readouts.

(few mins later)

Under load on stock voltage and 820/1000, the VRM temps are 66c.

I just thought it was power supply cos of what happened - the computer just powered down totally and wouldn't turn back on again for a few mins - gave me quite a scare!
    
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