Power Supply Questions, Need explanation/what is sli ready?pci-e?24pin vs 20?

[Tip Top]

Posted: Mon Feb 21, 2005 7:43 am Post subject: Need explanation/what is sli ready?pci-e?24pin vs 20?6600gt

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I am confused.
What is sli ready?
And if the power supply is not "sli ready" can you convert it to that?
What exactly is needed for the conversion. Should sli not ready be a
sign the supply maybe cannot handle 2 smaller sli cards such as 6600gt models? How much would you need on one of the 12 volt rails for that?
How much does each 6600gt draw?

What is pci-e connector? 6 pin right. But 6 pins that plug into the mobo and take 12v right? So on a 2 12v rail psu would you plug both the mobo12v and the pcie connector 12v each from a separate and unique 12v rail?. Can you convert non pci-e PSU to pci-e?

Finally is there a disadvantage of using an adapter on a 20 pin PSU to a 24 pin PSU? Do you get EMI leakage and that is why some MObo manufacturer instructions tell you to get a 24 pin psu from the start?

Thanks so much

 

[Gamingphreek]

SLI ready is a marketing gimmick for PSU's. On motherboards it means they have 2 x16 Graphics card slots but on PSU's it means virtually nothing but that it has a lot of power, and connectors. Just get a Quality PSU and you should be absolutely fine.

For running SLI i would have a PSU with no lower than 24A on the 12V rail. Or for the most part 2x 12V rails should be enough for it. A 6600GT is not a power hungry chip. You should be fine with almost any QUALITY PSU out there.

You have the PCI-E spec confused. You still have the 24/20 Pin power cable. On some boards they comply with the P4 spec which calls for an additional 4 pin 12V power connector dedicated to the CPU. The 6 Pin PCI-E is for future PCI-E cards, the 6800's of the PCI-E variant use these i believe.

As for the 20->24 pin connector, you have added a longer line, there is more resistance in the conversion and a small amount of EMI leakage. Nothing really to worry about but manf have noticed this and i believe OCZ has included an extra 4 pin cable which is attached to the side of the 20pin cable, so there is no extension.

-Kevin

 

[cryohazard]

So you're saying that if had a pair of 6800's he would need a PSU with two 6 pin connectors?

 

[HopfenspergerJ1]

24A... A 480W Antect "True Blue" won't cut it?

 

[Nessism]

Originally posted by: HopfenspergerJ1
24A... A 480W Antect "True Blue" won't cut it?

I wouldn't be afraid to run a True Blue with that setup if you already have one, but I wouldn't spend money on one if purchasing new.