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will this power supply support my system? - Page 2  

post #11 of 33
like they said its safe to have that bit extra just in case etc.....I bought the 1050w planning to crossfire with it and maybe waterloop. its a beast for the money, I paid £170ish for it and its the best thing ive ever bought tbh.

and the prcice difference isn't too much
post #12 of 33
Quote:
Originally Posted by Gardnerphotos View Post

I plan on using an 850w XFX pro black edition powwer supply but don't know if it is enough watts to run my system:

3930k OC'd
Asrock extreme9
2x gtx660TIs
1x 120GB SSD
64GB vengeance memory
2x Seagate Barracuda 3TB HDDs
Swiftech Apogee drive ii
9 Corsair SP120 quiet editions
Bitfenix recon fan controller

(everything will be water cooled)

This is at the very most, a 550w system. Maybe a little less.

The XFX 850w is way overkill. So you're more than good using it.
    
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post #13 of 33
Quote:
Originally Posted by Clowerweb View Post

I assumed the following in addition to what was given:

  • OC to 4 GHz
  • The 64GB of RAM is 8 x 8GB
  • The hard drives are 7200 RPM SATA
  • A blu ray optical drive
  • They didn't have your WC, so I put Swiftech H20-220 just to have something there
  • No additional PCI/PCIe devices
  • 10 USB devices connected
  • No lighting (cathode or otherwise)

The PSU calculator came up with 784-Watt minimum PSU for me. That's not counting capacitor aging. Including capacitor aging, after one year your rig will require a 900W PSU in order to get enough power. I'd say no, just to be safe. You should probably get that 1050W.
Your calculation is most likely nuts. Capacitor aging probably applies to crap PSUs and 4GHz won't EAT 300W. IT just won't.
A 3960X at 4.6GHz @ 1.4V will then eat 300W.
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post #14 of 33
I just tried asus wattage calculator for that (beasty) system and came up with 1050w recommended

https://www.asus.com/support/Power-Supply-Calculator/
post #15 of 33
Quote:
Originally Posted by d1nky View Post

I just tried asus wattage calculator for that (beasty) system and came up with 1050w recommended

https://www.asus.com/support/Power-Supply-Calculator/

Yeah.. I tried that psu calc also and it gives me recommended minimum psu of 950. I've been running just fine with my HX750, 4.8Ghz + Sli OC'd biggrin.gif
I'm pretty confident that OP would have no problems with that 850w psu.
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post #16 of 33
Quote:
Originally Posted by donrapello View Post

Yeah.. I tried that psu calc also and it gives me recommended minimum psu of 950. I've been running just fine with my HX750, 4.8Ghz + Sli OC'd biggrin.gif
I'm pretty confident that OP would have no problems with that 850w psu.

I think those PSU calcs do calculate a little on the high side. They probably try to account for things like how long an average user might use the PSU (they do degrade over time), and they probably also try to err on the side of caution to make sure you definitely don't buy a PSU that's going to be too weak. If they told you that your rig is going to pull 650W and that's exactly how much it does pull, a lot of people would then buy an exactly 650W PSU and have it fail after a year (or not work at all from the start). My guess is that they are estimating high to give you solid advice rather than recommending the bare minimum. They probably also try to account for a margin of error, plus the fact that a lot of PSUs are rated in peak wattage rather than continuous. Just a hunch though.
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post #17 of 33
"most" huh. Seasonic PSUs are underrated as with HEC PSUs (cougar, of coursE)
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post #18 of 33
HEC makes units ranging from Very Good to Complete Junk.
Seasonic makes units ranging from Good to ZOMG.

GTX660Ti TDP is 150w, max power the card can ever draw without hardmods is ~165w due to the hardware power limits. That's 330w.
The CPU is 130w stock, 300w is extreme cooling territory. You might see 250w if you really lean on it. Add that in and you have 580w.
Other Misc Stuff is <50w.

Your PSU is just fine, even with overclocking.
post #19 of 33
Thread Starter 
im going with 1050 based on what you have said, it is £20 more and I would like to see how far I can push the 3930k
post #20 of 33
Just so you know ur only going to use 50-60 percent of that 1050 power supply. If you are uncomfortable with a 650 watt which is still plenty, then grab a 750 watt and call it a day. A 750 can even handle a 680 sli and 3930k set up, no matter what the overclocks are.....


What stores can you buy from and your budget?
Edited by Quesoblanco - 3/21/13 at 10:55am
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