So, long story short - I recently received a bunch of someones spare components, and have bought the remaining parts needed to complete a system.
I got hold of an OCZ stealthXtreme 600W OCZ600SXS PSU, which is currently powering:
Asus P5k Deluxe
Q6600 OC to 3.5Ghz
Zalman CNPS9900MAX heatsink
4x 2GB OCZ Gold edition PC6400 800mhz
1x DVD writer
1x 7200rpm 500GB HDD
And now onto the video cards. I have 2 PNY 8800GT's, and a PNY 250 GTS card available to use. I either want to run the 8800GT's in SLI, or sell them and buy another 250 GTS for SLI. I can run SLI on this board using the SLIPatch for Windows.
My PSU has 4 rails, each rated at 12V@18amps. 12v1 is for CPU1, 12v2 is for CPU2, 12v3 is for "Motherboard accessories", and 12v4 is for PCI-E 1 & 2.
My problem here seems to be that both 6 pin PCI-E power cables are run off of one rail, limiting me to 18amps for both of my cards.
I have been learning a lot recently about power usage, rails etc, but I need someone to answer my specific problem as I'm still a bit confused. Here are my questions:
1) I have been able to successfully run the two 8800GT's in SLI, does this mean they were underpowered because of the 18amp max? Therefore not safe?
2) The max overcurrent limit on the rail based on the manual is 20.5amps, I'm not sure if that means its safe to go up that high?
3) I have the option of using a molex to PCI-E adapter to get power from the "Motherboard accessories" rail, but I don't know how much is already being used by the mobo and the components. Any suggestions?
4) If the 8800GT SLI is safe, how about 250 GTS SLI?
5) How do I find out the power draw for the components? The manufacture's sites just tell you the overall amps and watts needed for the entire system.
I know the easy answer would be to say "buy a better PSU", which I may end up doing (probably one with a single rail), but I'd like to first learn why the PSU would or would not work before I end up returning it for a better one.
over to you guys...
I got hold of an OCZ stealthXtreme 600W OCZ600SXS PSU, which is currently powering:
Asus P5k Deluxe
Q6600 OC to 3.5Ghz
Zalman CNPS9900MAX heatsink
4x 2GB OCZ Gold edition PC6400 800mhz
1x DVD writer
1x 7200rpm 500GB HDD
And now onto the video cards. I have 2 PNY 8800GT's, and a PNY 250 GTS card available to use. I either want to run the 8800GT's in SLI, or sell them and buy another 250 GTS for SLI. I can run SLI on this board using the SLIPatch for Windows.
My PSU has 4 rails, each rated at 12V@18amps. 12v1 is for CPU1, 12v2 is for CPU2, 12v3 is for "Motherboard accessories", and 12v4 is for PCI-E 1 & 2.
My problem here seems to be that both 6 pin PCI-E power cables are run off of one rail, limiting me to 18amps for both of my cards.
I have been learning a lot recently about power usage, rails etc, but I need someone to answer my specific problem as I'm still a bit confused. Here are my questions:
1) I have been able to successfully run the two 8800GT's in SLI, does this mean they were underpowered because of the 18amp max? Therefore not safe?
2) The max overcurrent limit on the rail based on the manual is 20.5amps, I'm not sure if that means its safe to go up that high?
3) I have the option of using a molex to PCI-E adapter to get power from the "Motherboard accessories" rail, but I don't know how much is already being used by the mobo and the components. Any suggestions?
4) If the 8800GT SLI is safe, how about 250 GTS SLI?
5) How do I find out the power draw for the components? The manufacture's sites just tell you the overall amps and watts needed for the entire system.
I know the easy answer would be to say "buy a better PSU", which I may end up doing (probably one with a single rail), but I'd like to first learn why the PSU would or would not work before I end up returning it for a better one.
over to you guys...