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Topic: 8800GTS installed, buggy |
| Author |
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BeerCheeze
Rated XXX
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 Posted: Wed, 10 Jan 2007 17:26:40 Post Subject: |
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Still got money that says it's your PSU.
| Quote: | | A minimum 400W system power supply (with 12V current rating of 26A) |
So by reading that I believe it means that card can draw up to 26A, you're PSU is only capable of putting out 18A on the 12V1 line (less on the 12V2 line).
Maybe that can be split, and they mean 26A total system use, which mean you need to make sure that you have that video card on the 12V1 line and nothing else.
Interesting read from PC Power & Cooling:
| Quote: |
8. ARE MULTIPLE 12-VOLT RAILS BETTER THAN A SINGLE 12-VOLT RAIL?
With all the hype about multiple 12-volt rails (ads claim that two rails is better than one, five is better than four, etc.), you’d think it was a better design. Unfortunately, it’s not!
Here are the facts: A large, single 12-volt rail (without a 240VA limit) can transfer 100% of the 12-volt output from the PSU to the computer, while a multi-rail 12-volt design has distribution losses of up to 30% of the power supply’s rating. Those losses occur because power literally gets “trapped” on under-utilized rails. For example, if the 12-volt rail that powers the CPU is rated for 17 amps and the CPU only uses 7A, the remaining 10A is unusable, since it is isolated from the rest of the system.
Since the maximum current from any one 12-volt rail of a multiple-rail PSU is limited to 20 amps (240VA / 12 volts = 20 amps), PCs with high-performance components that draw over 20 amps from the same rail are subject to over-current shutdowns. With power requirements for multiple processors and graphics cards continuing to grow, the multiple-rail design, with its 240VA limit per rail, is basically obsolete.
PC Power and Cooling is once again leading the industry. All of our power supplies now feature a large, single 12-volt rail. The design is favored by major processor and graphics companies, complies with EPS12V specs (the 240VA limit is not a requirement) and is approved by all major safety agencies such as UL and TUV. |
If you went with one of their 470W units it puts out 26A on 1 12V line. The bigger only put out more (and yes... I LOVE PC Power and Cooling). |
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