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kungfucow187

CM m1000 PSU SLI voltages

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hey. my sli performance isnt really doing so well. im using a cm m1000w psu and im certain the gpu vcc should be at 3.3v. im currently getting 3.2. can any of u guys tell me if im under voltage.. ill paste some pics of my system specs below

sysspecs.jpg

voltagestemps.jpg

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merovingian    0

you need a multimeter to measure voltages accurately. Also, at different loads the voltages should also be different.

So, what SLI performance isssues are you having?

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im getting better fps in games running the 1 8800gtx then 2.

ive tried monitoring the gpu vcc while playing a game and it doesnt seem to get any higher. i ran oblivion in windowed mode and the gpu vcc seems to drop even lower. arent the pci-e rails dedicated on the m1000?

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merovingian    0

Is the VCC suppposed to be at 3.3?

The voltage problems should only cause the system to be come unstable and crash and I don't believe it should cause a slowdown of the system. However, if you are trying to overclock, the card should be stable at slightly higher clocks depending on how accurate the voltages are but yours sound fine anyway. As I said before though, you need to use a multimeter to be sure.

Which games are you running?

How many frames are you getting?

How are you conducting the test? (are you using fraps and just running around and guessing that they are about the same or are you using futuremark)

I think the 80+ probably means the PSU is more than 80% power efficient at peak efficiency. 80+ is a notably high efficiency rating and I'm not sure about that PSU's rating.

If I don't get back to this thread soon then feel free to PM me. :wink:

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i use 3dmark06 and ppl with similar setups are gettin more points. im sure power has something to do with fps cuz ive had a similar problem way back when i was using a 7950gx2 with a 420w antec psu and i wasnt getting enough power. then i bought a silverstone 850zues and frames went up by 20.

ill go and get me a voltage meter soon. and with the 80+ sign. on the coolermaster website has the 80+ sign next to the psu. my one doesnt have it on the box or the actual psu. just worried maybe im not getting enough amps to my cards

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EsaT    0
im getting better fps in games running the 1 8800gtx then 2.
If you've managed to miss it SLI has been quite problem prone from the start and that kind behavior is "normal".

Especially considering you're using Windows Fatty which has caused lot of problems to nVidia's driver programmers.

im sure power has something to do with fps cuz ive had a similar problem way back when i was using a 7950gx2 with a 420w antec psu and i wasnt getting enough power. then i bought a silverstone 850zues and frames went up by 20.
So CWT made SmartPower/TruePower "timebomb". What I've read those keep ripple under control well... until capacitors expire and PSU gives up the ghost.

While lower voltage makes lightbulb dimmer PC components don't tolerate such ambiguities, there either is enough voltage and current available or there isn't, in later case result is crash.

As overclocker you should know that voltage being not enough for processor to operate causes errors, crashes and PC not operating at all.

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