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Which PSU [XFX 650/XFX 850] should go in which build AMD 1055T/Intel 2500k]?

Hi everyone!

I recently received a great deal on a couple of XFX's PSU's.  I am trying to understand which PSU would best suit build.

Here's the PSU's I just purchased:

XFX 650 Modular
XFX 850 Modular

Here's my two latest builds:

Intel 2500K/Gigabyte P67A-UD3
AMD 1055T/Gigabyte 890XA-UD3

Both systems will have the exact same peripherals/hardware:

8 GB or RAM
1 Agility 2 SSD
1 Galaxy GTX 460 GC
2 Western Digital 2TB HD's
CM Storm Sniper with all fan slots filled
Corsair's H70's
ASUS DVD drive

Ok, now the million dollar question:

What would be the best placement of the PSU's and why?
Maybe a better of way of saying it would be: Which system will need the extra power and why?

Thanks,

Soar

AMD 1055T
GIGABYTE GA-990FXA-UD3
XFX 6870 DD
Corsair Vengeance 1600 16GB
OCZ ZX-850 Watt Gold
HAF 932

Intel i5-3570
ASRock Z77 Extreme4
GeForce 560Ti
OCZ ZX-850 Watt Gold
Corsair Vengeance 1600 16GB
CM HAF X Blue

Both Systems:

Windows 7+10
Scythe Temp Monitor + Fan Controller

Dark Mantis

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  • 10typesofpeopleoneswhoknow binaryandoneswhodont
    • Dark Mantis
To be honest Soar there isn't much difference between the two systems and I would suggest putting the larger PSU into which ever system you intend to overclock more. Either PSU should be enough to run either system so unless you are planning any future upgrades it wouldn't really matter.
Gigabyte X58A-UD7
i7 920
Dominators 1600 x6 12GB
6970 2GB
HX850
256GB SSD, Sam 1TB, WDB320GB
Blu-Ray
HAF 932

Gigabyte Z68X-UD5-B3
i7 3770K
Vengeance 1600 16GB
6950 2GB
HCP1200W
Revo Drive x2, 1.5TB WDB RAID0
16x DLRW
StrikeX S7
Full water cooling
3 x 27" Iiy

bytheway_r

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Theoretically, the 2500k has lower power consumption than the 1055t. The difference seems to be quite noticeable, too. I think I'd place the 650W with the Intel CPU.

In the end, just like DM said, both of these PSUs are more than enough. The 850W is actually bordering on overkill if you don't plan to add anything in the future.

Here's a link to power consumption tests by guru3d:

http://www.guru3d.com/article/core-i5-2500k-and-core-i7-2600k-review/7

http://www.guru3d.com/article/phenom-ii-x6-1055t-1090t-review/5

P.S. Please tell me that you're going to overclock that 2500k ;). It just seems like such a waste to have it running stock when it should do 4,5 Ghz easily. Maybe even 5 Ghz but that'd require some effort to reach.  In the end, you can get at least 1 Ghz over stock values.
« Last Edit: February 13, 2011, 01:28:54 pm by bytheway_r »