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Is 1000w PSu enough for 290x crossfire and 3930k ?

Mr. May

Mr. May

Mr. May

Soldato
Joined
23 Apr 2009
Posts
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Derby
I have the set up in my sig but when I over clock the gpus's the system will cut out and just turn off if I leave them at stock there fine but the more I overclock the sooner this will happen :confused:

has any one else had this issue ?
 
Mr. May said:
I have the set up in my sig but when I over clock the gpus's the system will cut out and just turn off if I leave them at stock there fine but the more I overclock the sooner this will happen :confused:

has any one else had this issue ?
Click to expand...
You are underestimating how much power your overclocked 3930K consume:
http://www.overclock.net/t/1339653/does-this-scare-anyone-3930k-power-consumption

Considering a 290x would consume up to 315W on stock clock, if you overclock them, two of them can probably consume up to the 680-700W range, and your overclocked 3930K does not consume as little 300W, and that's not even considered what the rest of the system may consume yet.

I know it may sound weird, but may be disabling HT might give you enough headroom for overclocking the graphic cards? 6 Physical cores should be plenty to drive the CF290x.
 
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Marine-RX179 said:
You are underestimating how much power your overclocked 3930K consume:
http://www.overclock.net/t/1339653/does-this-scare-anyone-3930k-power-consumption

Considering a 290x would consume up to 315W on stock clock, if you overclock them, two of them can probably consume up to the 680-700W range, and your overclocked 3930K does not consume as little 300W, and that's not even considered what the rest of the system may consume yet.

I know it may sound weird, but may be disabling HT might give you enough headroom for overclocking the graphic cards? 6 Physical cores should be plenty to drive the CF290x.
Click to expand...

How much power would turning HT off save ?

And the psu I've got is the biggest one I can fit in my case lol
 
1000watt is enough it is not faulty.

Look at all the sigs here, similar CPU's with OC and 1 or 2 high end GPU's and not many have 1200+watt PSU's.
 
Mr. May said:
How much power would turning HT off save ?

And the psu I've got is the biggest one I can fit in my case lol
Click to expand...
I can't say for sure, as there's no Intel IvyBridge CPU with just 6 cores on its own...I can only say try and see?

I mean considering you are fine as it is no shutdown if you are not overclocking the graphic cards, so the whatever power saving you get from disabling the HT might be just enough to help?

Also for overclocking the 290x, my advise would be don't bother aiming for 1200MHz on the core clock, instead, just go for 1150MHz...or 1100MHz even (this is because the gain from the extra 50MHz is not worth the extra power consumption from using higher voltage, especially when you are hitting close to the limit of your PSU) and whatever highest memory clock you can get your 290xs to do without black screening.

You might even considering lowering your overclock on the CPU as well as lowering the vcore, as the 3930K with six cores is already very fast (unless you need the extra MHz for games that use less than 6 cores.
 
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Hi there

1000W is fine, I am running a pair of 290X overclocked with an FX-9590 on a 1000W Superflower without issues. It has even powered three 290X, though I would not do that long term as its taking the PSU beyond spec and that would only end in tears.
 
if your getting bsod when overclocking the graphics cards edit the registry to disable ulps, i had the same problem with 6970 crossfire
 
Gibbo said:
Hi there

1000W is fine, I am running a pair of 290X overclocked with an FX-9590 on a 1000W Superflower without issues. It has even powered three 290X, though I would not do that long term as its taking the PSU beyond spec and that would only end in tears.
Click to expand...

What the chances my enermax psu is faulty ? as my asus problem keeps popping up with voltage warnings everynow and then but I assumed that was the program.
 
i would have thought a 1000w psu was up to the job, only thing i can think of is try different pci leads to even out the load, pure guesswork mind
 
Spook187 said:
Could i jump in and say would a corsair 860i with a overclocked i5 3570k at 4.6 with two of these be enough power.

http://www.overclockers.co.uk/showproduct.php?prodid=GX-133-GI&groupid=701&catid=56&subcat=1752
Click to expand...

Cutting it close there and we've not had good results with the Corsair units, for example their 1200W Platinum struggles with three cards, whereas other 1200W's like Seasonic, Superflower, Antec don't have an issue.

So I'd say no, go with a 1000W, Gold or higher.
 
hi im not sure if your problem is the same as mine ive asked for help but no luck so far, (kernal power error 41)
my rig passes all stress tests in occt never crashes or restarts in normal use but as soon as i game maybe an hour or2/3 i get a restart and this is when using crossfire tried new bios clean install went back to old bios no difference, and this is using a 1200w corsair.
i am starting to think its the age of psu about 18 months old used on an overclock pc 24/7 i have read up on psu degradation and wondered if im just missing the output i require.
i almost regret buying 2 290x to the point that i might put my 690 back in .
 
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