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Will this power supply cut it? (i7 build)

  • Homebuilt
  • Power Supplies
  • Intel i7
  • Build
  • Systems
Last response: in Systems
September 30, 2010 5:32:04 PM

hi all,

my cheap 600W power supply has died, and i am now looking for a replacement.

My build:
Mobo: Gigabyte EX58A UD3R
CPU: i7 920 (@ 3.2Ghz)
RAM: OCZ Reaper 3x2GB 1600Mhz cas 7
GPU: ASUS Nvidia EN9600GT
Case: Antec 902

I am currently considering this power supply
Corsair 850W TX

Bearing in mind that in the future i may wish to run SLI will this power supply be enough, and are there any considerations i should take before buying?


More about : power supply cut build

a b B Homebuilt system
September 30, 2010 5:55:15 PM

That power supply would be huge overkill for your system now.

550W: any single graphics card
550W-600W: GTS 450s, GTS 250s (single 6-pin PCI-E port graphics cards) in SLI
650-750W: GTX 460s, GTX 260s (dual 6-pin PCI-E port graphics cards) in SLI
750-850W: GTX 470s in SLI
850-1000W: GTX 480s in SLI
Related resources
a b B Homebuilt system
September 30, 2010 5:55:20 PM

Corsair is an amazing brand, and 850W will be able to run a lot.

Here's my build:
CPU: i7-930 (not OC)
RAM: Patriot Sector 7 3x2GB 1600MHz
GPU: 2xEVGA GTX 460 1GB EE (SLI, OCed to 850MHz/1700MHz/2100MHz core/shader/mem clock)
1 SSD, 2 HDD
5 Case fans,
DVD RW drive
Bluray Reader

My power supply for all of this is an Antec EarthWatts 650W PSU. The 850W Corsair might be able to do GTX 470s in SLI, if I'm not mistaken (can't find my comparison chart I use...). You could probably do SLI will 600W.
September 30, 2010 6:21:16 PM

obsidian86 said:
the tx 850 is enough for 5 9600gt's 3x gtx 260 2 gtx 295's 2 gtx 480's so yeah it will cut it but this would power your rig with 2x9600's a 460,470,5850 2 x 5770's 5850 or 5870

or if you want 850 this is much much better for a lil more

I know it will be more than enough for my current rig, my old PSU only failed when i pushed to OC to 3.2 Ghz. i was just thinking the 850W because in the future i would like to play my games in 1080p and run a dual SLI GTX 460.

and also i thought corsair were the best for quality PSU's, but i think i may go with the modular XFX, has your recommendation plus more connectors. just out of curiosity what are the silver and gold certifications for?
a b B Homebuilt system
a b ) Power supply
September 30, 2010 6:28:35 PM

this explains it in great detail

xfx recently entered the power supply market with a competitive price and controversial looks a lot of people didn like the toxic green fan so much so they introduced a grey fan lol, but their power supplies are all currently made by seasonic under the case,seasonic also makes power supplies for corsair like the new ax series up until 1000 watts

for a comparison the xfx 850 actually trades blows with the hx850 across the board in terms of quality and performance but that price loses the battle for the hx850
September 30, 2010 6:41:09 PM

I see, so its a good thing for the electricity bills. The XFX does look enticing but i just read this review whre the OCP had failed on two different XFX units. Even worse, this is what happened with my PSU, so i now fear the worst for the rest of my rig.

XFX 850W Black edition ATX PSU review

so now i am not so sure whether i should choose the XFX, I know these where under extreme loads, but better to be safe than sorry, especially after its already happened once.
September 30, 2010 8:04:50 PM

Ok obsidian, you've convinced me, although i do agree the green isn't the best of colours, but its not that big of an issue. Just hope the rest of my build is working.

Nice find, Thanks obsidian.
September 30, 2010 8:13:40 PM

I would step down to the 750. 750 is plenty to run SLI 460's, with full overclocks on the proc and both gfx cards. Remember that 750 is what the psu is rated to run at continuously. It will be able to handle spikes to well above 750 with no problem. This is especially the case with the XFX 750, which has great voltage stability regardless of the amps being pulled.

I would say either the Corsair 750 or the XFX 750. Newegg usually has at least one of them on sale at any given time. I would just go with whatever is cheaper between the two. Note that at usual prices, the Corsair 750 modular psu is about $20 more expensive than the XFX.
a b B Homebuilt system
a b ) Power supply
September 30, 2010 8:28:17 PM

im sure you'll be happy