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4 pin in 8 pin Socket?

post #1 of 10
Thread Starter 
I have a 400W PSU with a 4 pin CPU power cable. My new motherboard has an 8 pin CPU power socket. Can I use the 4 pin cable in the 8 pin socket? Will it cause any damage to my system to do this?
post #2 of 10
u can use it. but its recommended to use the 8pin
 
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post #3 of 10
Quote:
Originally Posted by OverClockBug View Post

I have a 400W PSU with a 4 pin CPU power cable. My new motherboard has an 8 pin CPU power socket. Can I use the 4 pin cable in the 8 pin socket? Will it cause any damage to my system to do this?

Yes that will be fine, it will only fit in one side as the pins are keyed.
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post #4 of 10
It will fit as said above ^, as the pins only allow it to go in one way, even if it's only half of the connector. Problem is, that the 8-pin is rated to supply ~300W of power to a CPU (little overkill really, unless you get crazy with overclocking), and a 4-pin ATX power cable is only designed to deliver ~150W of power. Overly high current with that setup, and the board assuming an 8-pin connector, could lead to melted wires and burned sockets/plugs.
    
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post #5 of 10
Yes you can put a 4 pin in an 8 pin CPU power socket. It will work without issue. You'll just be capped to about ~150W being supplied to the CPU rather than 300W. Realistically the only reason you'd need the 8 pin CPU power is if you where doing some extreme overclocking ie LN2 or Phase.
Edited by M3T4LM4N222 - 9/4/12 at 7:20pm
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post #6 of 10
Thread Starter 
Thanks for the quick replies everybody biggrin.gif. It's been difficult to find information about this subject that didn't turn into a flame war. I plan to add a couple video cards and overclock the CPU-RAM-GPU in the future, at which time I would upgrade my PSU. However, at the moment there seems to be a pretty good deal on the Corsair HX850 on Newegg. After the 10% off and $20 rebate it comes out to $128.49. What are your opinions on upgrading my PSU now? I would be running the following hardware:

Maximus V Gene
3570K (Stock Speed)
8GB of Samsung MV-3V4G3D/US (Stock Speed)
128GB Vertex 4 SSD
2 x 1TB HDD in RAID 1
PCIe Firewire Card
post #7 of 10
Pointless, the 4pin CPU is able to deliver ~190W, which is about 90W more than your CPU can pull under anything except extreme cooling (benching style).

What is your current PSU?
post #8 of 10
Thread Starter 
I'm currently using a 400W SeaSonic X.

I've been trying to figure out what GPU I would add in the future, and really I'm pretty open. But man, have I learned the hard way not to ask certain questions concerning power consumption and GPUs. I've read everything from 650W max for an SLI/CFX setup to 1000W. It's just too heated of a debate to get a straight answer.

EDIT: I forgot to mention I can't find the 8 pin connector for my PSU, but I had a spare 4 pin lying around.
Edited by OverClockBug - 9/4/12 at 6:04pm
post #9 of 10
Quote:
Originally Posted by OverClockBug View Post

I'm currently using a 400W SeaSonic X.
I've been trying to figure out what GPU I would add in the future, and really I'm pretty open. But man, have I learned the hard way not to ask certain questions concerning power consumption and GPUs. I've read everything from 650W max for an SLI/CFX setup to 1000W. It's just too heated of a debate to get a straight answer.
EDIT: I forgot to mention I can't find the 8 pin connector for my PSU, but I had a spare 4 pin lying around.

For SLI/CFX, barring worst case scenarios with GTX690's and such- or an extremely high CPU overclock. A high quality 750-850 will be -more- than enough. My Seasonic X750 has two power hungry Fermi cards, and an X6 to deal with hah.

Edit: I was a little skeptic myself, until I saw this PSU sort of just giggle at GPU + SMP folding, fan barely runs and what not- awesome PSU, and only 750.
Edited by mezmenir - 9/4/12 at 6:13pm
    
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post #10 of 10
Quote:
Originally Posted by OverClockBug View Post

I'm currently using a 400W SeaSonic X.
I've been trying to figure out what GPU I would add in the future, and really I'm pretty open. But man, have I learned the hard way not to ask certain questions concerning power consumption and GPUs. I've read everything from 650W max for an SLI/CFX setup to 1000W. It's just too heated of a debate to get a straight answer.
EDIT: I forgot to mention I can't find the 8 pin connector for my PSU, but I had a spare 4 pin lying around.
That is an excellent unit, mail Seasonic and ask them for an EPS cable, I'm sure they'll sent you one free of charge.

About VGA's, your unit can power any single GPU card from the current generation except a highly overclocked 7970, but you'd be fine with anything else (680/670/7950/etc).

edit: might as well ask them for a dual 6+2pin PCIe cable as well, since your unit has only one despite being able to support VGAs that require two and having the same modular panel as the X-460, which does have two 6+2pin connectors.
Edited by Original Sin - 9/4/12 at 6:37pm
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