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power and 2 680's - Page 2

post #11 of 49
Thread Starter 
Quote:
Originally Posted by Matt-Matt View Post

Maybe not that much power.. Something like 750-850W should suffice.. But I'd suggest a 850W+ quality unit..
You should never use those adapters, and if you need to you should triple check everything... They're not too good either way as you have no idea where it's getting the power for it from.


i should never use http://www.komplett.no/k/ki.aspx?sku=317468 ?
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post #12 of 49
For the people saying 800W+, they are using generic calculators. The best way is to look at reviews of the GPUs and actually see what kind of max power consumption figures they have.

GTX 680s consume about 200W at max load (400W with two), so you would still have 250W for your CPU, hard drives, RAM, and fans. You may be able to do some mild overclocking, but don't expect extreme overclocking without a better PSU.
Quote:
Originally Posted by NorKris View Post

i should never use http://www.komplett.no/k/ki.aspx?sku=317468 ?

It's fine to use, just don't expect to overclock too much.
post #13 of 49
Thread Starter 
Quote:
Originally Posted by Kokin View Post

For the people saying 800W+, they are using generic calculators. The best way is to look at reviews of the GPUs and actually see what kind of max power consumption figures they have.
GTX 680s consume about 200W at max load (400W with two), so you would still have 250W for your CPU, hard drives, RAM, and fans. You may be able to do some mild overclocking, but don't expect extreme overclocking without a better PSU.
It's fine to use, just don't expect to overclock too much.


it will be overclocking but not increasing of voltage o:
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post #14 of 49
Quote:
Originally Posted by Kokin View Post

For the people saying 800W+, they are using generic calculators. The best way is to look at reviews of the GPUs and actually see what kind of max power consumption figures they have.
GTX 680s consume about 200W at max load (400W with two), so you would still have 250W for your CPU, hard drives, RAM, and fans. You may be able to do some mild overclocking, but don't expect extreme overclocking without a better PSU.
It's fine to use, just don't expect to overclock too much.

On multi-rail PSUs that do stupid things and not include enough PCIe adapters (any good quality one won't make this dumb ass mistake), they are not recommended to be used.
BUT - if your PSU does not have the required connectors out of the box, trash it.
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post #15 of 49
Quote:
Originally Posted by tompsonn View Post

On multi-rail PSUs that do stupid things and not include enough PCIe adapters (any good quality one won't make this dumb ass mistake), they are not recommended to be used.
BUT - if your PSU does not have the required connectors out of the box, trash it.

Ah I didn't see that it was multi-rail.

@OP: It might be better to just downgrade those GTX 680s to GTX 670s and get yourself a better PSU like the three that tompsonn suggested.
post #16 of 49
Quote:
Originally Posted by Kokin View Post

Ah I didn't see that it was multi-rail.
@OP: It might be better to just downgrade those GTX 680s to GTX 670s and get yourself a better PSU like the three that tompsonn suggested.

Four rails on a 650W PSU is really not necessary - not that it makes any difference, though smile.gif
Anyway there are three 6-pin PCIe and 1 6/8-pin PCIe... (which is absolutely ridiculous I think).

650W will be enough to power the two 680s, however as said, yeah it's not a good idea to use those adapters as you don't know which rail you're connecting the adapters to. It might be the one your drives are on, might be the same one as the other GPU which would almost certainly trigger OCP and boom, PSU shuts down.

Because I don't recommend using this PSU at all (due to the required use of the adapters), I would recommend the ones I linked - no point getting another 650W (even though it is enough).
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post #17 of 49
Quote:
Originally Posted by Kokin View Post

@OP: It might be better to just downgrade those GTX 680s to GTX 670s and get yourself a better PSU like the three that tompsonn suggested.

No, I don't think so.

He wants to change his motherboard as wel wich is a P8P67 board. I would keep the board, as it's very good, and use that moneyt to buy a decent HX Corsair
   
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post #18 of 49
Quote:
Originally Posted by ASUSfreak View Post

No, I don't think so.
He wants to change his motherboard as wel wich is a P8P67 board. I would keep the board, as it's very good, and use that moneyt to buy a decent HX Corsair

Why straight off the bat a Corsair HX? Why not another unit by say, Antec... or Rosewill (OK not available to him), or Silverstone, that is equally good?
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post #19 of 49
Quote:
Originally Posted by tompsonn View Post

On multi-rail PSUs that do stupid things and not include enough PCIe adapters (any good quality one won't make this dumb ass mistake), they are not recommended to be used.
BUT - if your PSU does not have the required connectors out of the box, trash it.

Exactly what I meant, that and the PSU probably wasn't designed to handle 2x GTX680's or at least their power load with an overclocked processor. Also overclocking a CPU/GFX card with "no voltage" will still add more strain to the system, and the auto setting will take a fair bit of voltage if you leave that.
 
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post #20 of 49
650 is enough to power your 680s and your 2500k at any clocks you want, if I can run a 3770k @ 4.8 and 2 680's, 8 fans, and 6 hard drives and a dvd rw and never break 650 at the wall at roughly 84% efficiency, you are good to go.
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