bigcape
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Saturday, December 25, 2010 6:43 AM
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Everything is fine until I power the optioal 12V overclock 6PIN CPU power!
Situation 1. using Thermaltake 1300w PSU makes the system fans including the 2 Quadro 4600's pulsate BACKWARDS!
Situation 2. Daisy-Chaining a seperate 1000w PSU just for trouble shooting (like having a seperate rail or two) makes the fans blow 100% and the debug console not light.
Either way NO-BOOT!
Any one have any issues with those in use? Am I missing something?
Thanks guys
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_ShannonR
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Sunday, December 26, 2010 9:16 AM
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Can you try a different 6 pin PCIE connector for the CPU?
I have seen this issue whne there was a bad PCIe cable.
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bigcape
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Tuesday, December 28, 2010 3:44 AM
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ShannonR,
I have used every PCIE cable I have (10+) Including a seperate PSU just to power them seperatly! Including the other way around.
Since then another PSU.
I am open to ANY suggestions.
Thank you for your help.
Oh PS--- i have also Multimetered all pinnouts for V++ as well
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_ShannonR
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Tuesday, December 28, 2010 5:15 PM
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That is definitely strange as the 8 pin, and 6 pins go to the same place to supplement power to the CPU.
have you tried each side individually? try only CPU 0 and hookup 8 pin, then startup.... then add 6 pin and startup again.... if it fails, then try the same steps on CPU 1
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bigcape
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Wednesday, December 29, 2010 2:45 AM
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That is one test I did not do untill just now.
Same result with CPU-0 or 1 enabled or disabled with only one PCIE PWR supplied at a time. Fans rev 100% no debug L.E.D's and no boot!
???????
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bigcape
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Tuesday, June 14, 2011 9:00 AM
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are bumps forums not legal or better than starting a duplicate thread
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radiantdragoon87
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Tuesday, June 14, 2011 2:01 PM
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as far as I know there a difference between a 6 Pin PCI-E for CPU and for Video, it may be the wrong one, unless the pin outs and voltages are the same? any way to know for sure which is which.
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cateno
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Tuesday, June 14, 2011 2:09 PM
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hi you use eps 8 pin and 6pin pcie in the same time for each CPU
you have a multimeter to check if the 12 V is not downs
because the pin 12V in EPS and pcie6 is not the same place reverse with the GND and the PSU not like the shortcut
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muskie32
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Tuesday, June 14, 2011 5:41 PM
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Try it without the optional 6 pin PCIe power plugged in to each CPU. Unless you are overclocking super high you wont need them.
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bigcape
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Wednesday, June 15, 2011 4:37 AM
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well, it would not boot with power to the overclocking plugs STOCK settings.
The 12V pins should be the same as a video card otherwise the instructions would not be "use an unused PCIE power supply"
I will try one CPU vs another alone and post my findings.
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asmodeus2112
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Re:Optional CPU0 and CPU1 Overclock 12V PCIE KILLS SR-2?
Friday, June 17, 2011 5:38 PM
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Just FYI, you should never plug two power supplies into the same circuit. As EVGA says, the 6-Pin PCI-E is supplemental to the 8-Pin EPS, so plugging the 8-Pin from one power supply and the 6-Pin from another will do bad things. Sometimes you will get negative voltage going to the power supply with lower voltage on the rail connected. The Thremaltake is not a single 12V rail supply, so maybe there are some issues pugging in the 8Pin from one rail and the 6 pin from another rail to the same power circuit. You might try a power supply with one 12V rail and see if it causes the same problems. Fans spinning backwards is usually negative voltage...
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