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PSU troubles

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October 27, 2012 5:00:07 PM

Hi guys, I'm in a bit of a bummer here.

I just completed assembling my build using an FSP HE500W. According to reviews it seems to be a rock-solid PSU, and I didn't really know better, so I went for it.

Today I ran a couple of benchies, and Heaven kept crashing, so I thought I'd dig in for more info. The PSU came with 1 6pin and 1 6+2 pin, but they're both on the same 12V rail. Worse, that rail can only deliver 18A max, while my 660Ti needs 24A max, and 2x6 pins.

At least that's the info I got from reading a review. Is there anyway I can keep using this PSU? Or do I have to replace it with another already :( 

More about : psu troubles

a c 697 ) Power supply
October 27, 2012 5:02:32 PM

The 660Ti needs a system with total 24amps on +12 volts not just a single rail at 24A! I am presuming your PSU has 2 or more +12 volt rails.
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October 27, 2012 5:08:33 PM

rolli59 said:
The 660Ti needs a system with total 24amps on +12 volts not just a single rail at 24A! I am presuming your PSU has 2 or more +12 volt rails.


It has 2 12V rails with 18A each. Should I just get a molex -> 6pin converter?

The molex for SATA drives and the 6+2/6 pins are on different rails, so it should work, right?
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a c 697 ) Power supply
October 27, 2012 10:02:28 PM

18 amps dedicated is plenty for your card, something else might be causing the issue.
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October 27, 2012 10:24:31 PM

is there a way for you to test the voltage? the 12v rail might be running low (indicating a bad power supply). i think a power supply tester is $15 or so off of newegg. you can also see the voltages with speed fan, but their not quite as accurate.
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Anonymous
a b ) Power supply
October 27, 2012 10:42:13 PM

rolli59 said:
18 amps dedicated is plenty for your card, something else might be causing the issue.

+1
just to show the OP


your PSU http://translate.google.es/translate?js=n&prev=_t&hl=es...


so 18*12= 216 and to keep that no more than 80% load 216*.8= 172.8 watts. that ought to give you a few watts of room.
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October 30, 2012 5:33:40 AM

It's weird.

I ran Furmark and its stable. Temps rose to about 74oC, while Heaven would just die out quite quickly, and temps were not even 65oC most of the time.

1 thing I noticed though, is that with Furmark clocks remained at 943MHz I think, while on Heaven I sometimes would see clocks go up to 1150, and voltage to 1.175V. I haven't overclocked the card at all.

One thing I noticed is that the card's memory clocks are always shown as 3005MHz. Shouldn't it be 6008?

Last thing, I'm currently at work and these numbers are just ones off the top of my head, so it might not be exact, but should be close enough.
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Anonymous
a b ) Power supply
October 30, 2012 3:18:14 PM

trandoanhung1991 said:
It's weird.

I ran Furmark and its stable. Temps rose to about 74oC, while Heaven would just die out quite quickly, and temps were not even 65oC most of the time.

1 thing I noticed though, is that with Furmark clocks remained at 943MHz I think, while on Heaven I sometimes would see clocks go up to 1150, and voltage to 1.175V. I haven't overclocked the card at all.

One thing I noticed is that the card's memory clocks are always shown as 3005MHz. Shouldn't it be 6008?

Last thing, I'm currently at work and these numbers are just ones off the top of my head, so it might not be exact, but should be close enough.

the memory base clock would be 3005 with the effective 6008; ddr is double data rate or twice the speed as the base.

however your core clock speed does seem flonky. a boost of ~70-75Mhz is the usual boost in most cards and a 200Mhz is very odd. what specific card do you have and what drivers are you using?
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October 30, 2012 11:13:50 PM

Anonymous said:
the memory base clock would be 3005 with the effective 6008; ddr is double data rate or twice the speed as the base.

however your core clock speed does seem flonky. a boost of ~70-75Mhz is the usual boost in most cards and a 200Mhz is very odd. what specific card do you have and what drivers are you using?


Hmm, I'd have thought the base clock would be 1502, since it's GDDR5.

Anyway, I just played around with Borderlands 2 and it crashed. The voltage was at 1.175 and highest clock I saw was 1071.

I'm using a Sparkle GTX 660Ti.

Are there any conclusive tests to determine if this is a PSU or GPU problem?
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Anonymous
a b ) Power supply
October 31, 2012 12:50:25 AM

trandoanhung1991 said:
Hmm, I'd have thought the base clock would be 1502, since it's GDDR5.

Anyway, I just played around with Borderlands 2 and it crashed. The voltage was at 1.175 and highest clock I saw was 1071.

I'm using a Sparkle GTX 660Ti.

Are there any conclusive tests to determine if this is a PSU or GPU problem?

you're right it is 1502.
lloking at your card:
http://www.sparkle.com.tw/en/News.asp?id=111
those volts are extremely high for a reference card like that. so is the GPU boost speed you're hitting; should be 980 MHz. the specs you are posting are more for a asus DCII TOP. i would think that card ought to be 0.987 volts with 1.150 or more being too high.

short of swapping out the PSU, you can try to download afterburner or precisionX and manually set the core speed and voltage.
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November 10, 2012 1:30:17 AM

I ended up swapping both the PSU and the GPU for a FSP Raider 550W and a MSI GTX660Ti Power Edition OC.
Very stable now, and the new beast can really overclock. Currently sitting on 90 core and 625 memory, stable in OC Scanner.
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Anonymous
a b ) Power supply
November 10, 2012 7:20:12 AM

that is a 1,000% better card. glad you got it sorted.
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!