HX1000W Not enough for me? Loading wrong?

[watercooling]

Hi, I have an HX1000 that powers my system perfectly, But I have an issue when I try to overclock the graphics cards Using GPU voltage tuner.

 

I bump volts on my two gtx 295's to 1138 MV's and my cyberpower UPS shows

940+ watts. vantage runs for a bit, then shuts down usually near end of first test. I bypass UPS go right to wall, and same thing, now once right before comp shutdown the red light came on my second GTX295.

 

BTW the 940+ watts is just my power supply draw, monitor and other stuff is seperate.

 

I just looked the HX1000 distribution sticky, and I am wondering, do I need to

have my second card hooked to the top two blue connectors? right now

my second card is hooked to the second set of connectors marked 12v2.

 

do i need to move it to the top 12v1 connectors?

 

Or have i reached my limit with this PSU?

 

watercooling

[FEAR6655]

You're far from the limit with that PSU.

 

http://forum.corsair.com/v3/showthread.php?t=70317

[RAM GUY]

You will want to power one card with the fixed PCIE cables on the HX1000, and then the other card should be powered by the first 2 PCIE ports closest to the fixed cables, which are labeled as 12v1 in the diagram that FEAR6655 linked above.

[watercooling]

Ok, I put the second GTX on the first set of blue connectors next to fixed cables

and the computer shut down much faster, Odd.

 

I am gonna try different drivers. double check mem. ( I am hours prime blend stable though)

 

wanted to add, and I know this is software readings. with OCCT GPU test. level 6 shader 1900x1200 and running prime 95 at the same time.

 

my 12V line shows 11.8 , but more concerned with 3.3, at idle it is about 3.2 but running this test it went to 3.1

 

back to testing I go.

[Yellowbeard]

Just for testing, try the same tests on your GPUs but with the CPU at stock settings. Also, you may want to test each GPU individually and see if they are stable at your intended OC.

[x509]

RAM GUY,

 

Please pass this message on to POWER GUY:

 

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I liked the diagram for the HX1000, but that power supply would be overkill for me, since I won't be running multiple graphics cards. Are there similar diagrams for the HX750 and HX850?

 

Thanks.

[Yellowbeard]

RAM GUY,

 

Please pass this message on to POWER GUY:

 

-----------

 

I liked the diagram for the HX1000, but that power supply would be overkill for me, since I won't be running multiple graphics cards. Are there similar diagrams for the HX750 and HX850?

 

Thanks.

 

A similar diagram is not needed for the HX750/850 CPUs. They are true single rail designs and therefore the cabling distinctions for the HX1000 do not apply.

[watercooling]

Ok, finally got a little time for more testing.

 

With both gtx 295+'s on 12v2 with slight voltage bump with voltage tool, and slight overclock. System shuts down.

 

Same as above but with cpu put all stock. system shutdown.

 

that tells me 12V2 is overloaded.

 

I put one of the GTX 295's on 12v1 first blue connectors next to fixed.

 

with CPU at stock I was able to voltage bump, and overclock the gtx 295's for

quite awhile (actually new high clocks for me) spent a few hours with this. only

a few issues with driver stopped responding due to settings , but NO shutdowns.

 

Put my CPU back to OC still with gtx295 on 12v1 and OC also, and it shut down before the end of the test ..

 

it SEEMS wattage may be ok, but I am pulling too many amps?

 

Question: Can I use this power supply as a slave to another? I would like to try another

power supply powering board and maybe a few fans and drives. and use the

HX1000 to power just the video cards, and a few fans and drives. Can I do

this safely? and long term if needed?

 

thanks.

 

Watercooling