Thermaltake Power Express 250w with 8800GTS SLI Should be SLI Certified for 8800GTS
Ok well, I am running dual 8800GTS in SLI. At first I ran them both on a Thermaltake Purepower 500W FLAWLESSLY. Ran 3DMark06 many times and have never had any problems. I even overclocked my system, and they still ran perfectly.

Then after lots of research, I baught a Purepower Express 250W. Even though it says "(not certified for Dual GeForce 8800 GTS)" on the slizone.com page. Why? Because it is certified for Dual 7950GX2's, which use almost the same amount of power.

On the SLIZONE.com SLI-Ready Power Supplies list, the dual 8800GTS is under the same list as the dual 7950GX2's. Most probably because they use almost identical power. So my question is.. if the PPEx250w is certified for dual 7950GX2's why are they not certified for the dual 8800GTS? I think I know why, but I need someone "in the know" to tell me. So the question is...

1: Did the Purepower Express 250w even get tested on dual 8800GTS yet? I don't think it did.

Because, the PPEx250w is running both my 8800GTS's FLAWLESSLY. 3DMark06 is supposed to stress it to the max, and it did, and it passed perfectly.

Also the math add's up right...
PCI-E slots get about 75watts max from the motherboard. And the single PCI-E 6pin molex power connector can only get a max of 75watts. So that is 150watts for each card.. MAX. So that is 300watts for dual 8800gts's.

But that 300watts isnt directly from the 250w add-on PSU. Since my main 500w PSU is running the motherboard, it is giving 75watts + 75watts to each 8800 through the PCI-E slots. And my 250w PSU is only giving 75w + 75w to the cards through their single 6pin molex connections. So both of my PSU's are giving the cards 150watts. That leaves a LOT of power room to play with.

Watts divided by Volts(12) = Amps

So the PPEx250w is only giving 150watts and 12.50 amps to both cards, when it is rated 250w with 21 amps. There is absolutly NO REASON at all for the Purepower Express 250w to not be certified. So has it even gone through the certification yet for the the 8800GTS??

Also, there is proof that a 520watt PSU could easly run a overclocked AMD FX-60 and SLI 8800 GTX. So is the SLI Certification over doing it?


Specs...

DFI LanParty UT SLI-DR "Expert" - SLI Certified
AMD X2 3800+ @ 2009Mhz - Yes I have a CPU bottleneck
2x1G OCZ4001024PF - PC3200 DDR400 Dual Channel- 2Gig total - not SLI Certified
2x BFG GeForce 8800GTS - SLI Certified
2x CD-RW and DVD-RW
2x Maxtor 250gig IDE.
Thermaltake Purepower 500w
Thermaltake Purepower Power Express 250w - SLI Certified
1x120m Case Fan
Ok well, I am running dual 8800GTS in SLI. At first I ran them both on a Thermaltake Purepower 500W FLAWLESSLY. Ran 3DMark06 many times and have never had any problems. I even overclocked my system, and they still ran perfectly.



Then after lots of research, I baught a Purepower Express 250W. Even though it says "(not certified for Dual GeForce 8800 GTS)" on the slizone.com page. Why? Because it is certified for Dual 7950GX2's, which use almost the same amount of power.



On the SLIZONE.com SLI-Ready Power Supplies list, the dual 8800GTS is under the same list as the dual 7950GX2's. Most probably because they use almost identical power. So my question is.. if the PPEx250w is certified for dual 7950GX2's why are they not certified for the dual 8800GTS? I think I know why, but I need someone "in the know" to tell me. So the question is...



1: Did the Purepower Express 250w even get tested on dual 8800GTS yet? I don't think it did.



Because, the PPEx250w is running both my 8800GTS's FLAWLESSLY. 3DMark06 is supposed to stress it to the max, and it did, and it passed perfectly.



Also the math add's up right...

PCI-E slots get about 75watts max from the motherboard. And the single PCI-E 6pin molex power connector can only get a max of 75watts. So that is 150watts for each card.. MAX. So that is 300watts for dual 8800gts's.



But that 300watts isnt directly from the 250w add-on PSU. Since my main 500w PSU is running the motherboard, it is giving 75watts + 75watts to each 8800 through the PCI-E slots. And my 250w PSU is only giving 75w + 75w to the cards through their single 6pin molex connections. So both of my PSU's are giving the cards 150watts. That leaves a LOT of power room to play with.



Watts divided by Volts(12) = Amps



So the PPEx250w is only giving 150watts and 12.50 amps to both cards, when it is rated 250w with 21 amps. There is absolutly NO REASON at all for the Purepower Express 250w to not be certified. So has it even gone through the certification yet for the the 8800GTS??



Also, there is proof that a 520watt PSU could easly run a overclocked AMD FX-60 and SLI 8800 GTX. So is the SLI Certification over doing it?





Specs...



DFI LanParty UT SLI-DR "Expert" - SLI Certified

AMD X2 3800+ @ 2009Mhz - Yes I have a CPU bottleneck

2x1G OCZ4001024PF - PC3200 DDR400 Dual Channel- 2Gig total - not SLI Certified

2x BFG GeForce 8800GTS - SLI Certified

2x CD-RW and DVD-RW

2x Maxtor 250gig IDE.

Thermaltake Purepower 500w

Thermaltake Purepower Power Express 250w - SLI Certified

1x120m Case Fan

#1
Posted 12/29/2006 06:00 AM   
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