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PSU recommendations for i7 + GTX 460s SLI, OCed

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September 21, 2010 2:19:06 PM

Here's my current setup:
i7-930
EVGA FTW3 SLI Mobo
EVGA GTX 460 1GB
DVD Burner
Blu-ray Reader
SSD + 2 HDDs
5 case fans
Antec Earthwatts 650W PSU (approx. 1 yr old, so it may not be up to par with the current EW 650)

I'm looking to purchase a second GTX 460 and SLI + OC them, and I feel that an EarthWatts PSU won't cut it (current 650 or 750).

I used the Extreme PSU Calculator for my ideal set up and it recommends at least 718W (so a 750 in practicality), but I've seen other forum pages recommending some 650W PSUs (mainly the good brands like Corsair, XFX, Seasonic and Antec), but the users didn't seem to be overclocking the GPUs at all, only the CPUs.

My ideal budget is as close to $100 as you can get it.

Thanks!
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a b ) Power supply
September 21, 2010 6:57:00 PM

Yes that's also a great choice.
September 21, 2010 7:28:21 PM

Do either of you think that a 650W Continuous (as opposed to 650W Max) Power Supply would work, or should I stick with a minimum of 750w?
a b ) Power supply
September 22, 2010 1:53:08 AM

SLI 460's might top out at 500w but dont forget an i7 OC'd will draw another 200w and thats without the rest of the system. If your serious about OC'ing then I'd suggest a quality 850W unit just o play it safe/safer.
September 22, 2010 2:04:28 AM

I don't plan on OCing my CPU, only the GPUs. I don't know enough about OCing yet to even attempt it...
September 22, 2010 2:12:00 AM

I'm about to power a o/c i5 750 with 2 gtx 460's myself. Same psu ea 650. Am running one 460 ,just ordered the second. I'm hoping I see no negative signs, if I do, I will upgrade.
I need a new psu for my Dell 530, I was going to transfer the antec to that, but decided against.
edit: I needed more 6 pin connectors so I went with these: x2 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Found this 400 watt psu for 29.99, it looks like a nice psu RAIDMAX RX-400AF 400W ATX12V / EPS12V 80 PLUS BRONZE Certified Power Supply : http://www.newegg.com/Product/Product.aspx?Item=N82E168...
a c 165 ) Power supply
September 22, 2010 4:25:34 AM

popatim said:
SLI 460's might top out at 500w but dont forget an i7 OC'd will draw another 200w and thats without the rest of the system. If your serious about OC'ing then I'd suggest a quality 850W unit just o play it safe/safer.



it stated SYSTEM POWER CONSUMPTION not GRAPHIC CARD that system included an OC i7

Test System Specs
- Intel Core i7 920 (Overclocked @ 3.70GHz)
- x3 2GB G.Skill DDR3 PC3-12800 (CAS 9-9-9-24)
- Asus P6T Deluxe (Intel X58)
- OCZ GameXStream (700 watt)

even they used a 700w PSU and still had 200w to spare.
September 22, 2010 12:29:51 PM

@notty22: That's what I was thinking of doing, just getting the card first and seeing if it does indeed need more power. The EVGA 460s come with 4-pin to 6-pin adapters, so luckily I don't need to buy them.

@ct1615: I feel like running those cards that high on an OCZ PSU is unsafe. I've heard the newer PSUs are sort of a step down from previous models, since they use less-than-average capacitors and such. Although if 2 460s can OC on that, I might be able to do it on my Antec 650...
a c 248 ) Power supply
September 22, 2010 2:12:25 PM

Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty (in the USA).
a c 165 ) Power supply
September 22, 2010 4:42:12 PM

boiler1990 said:
@
@ct1615: I feel like running those cards that high on an OCZ PSU is unsafe. I've heard the newer PSUs are sort of a step down from previous models, since they use less-than-average capacitors and such. Although if 2 460s can OC on that, I might be able to do it on my Antec 650...


newer what? OCZ PSU? PSU in general?

you own the PSU already, may as well give it a chance to shine
September 22, 2010 5:30:56 PM

@Johnny Lucky: I know what brands to get, but I needed to know if I actually needed to buy a new PSU.

@ct1615: I meant I had read some reviews on the more recent (past year or two) OCZ PSUs and they bashed them relative to prior models for not skimping on the capacitors and the like.

I may just wait a bit, because I only have money to buy another 460 or a PSU, but not both, so either way I end up SOL. I'm waiting for the card to go on sale or down in price...
September 24, 2010 1:54:26 AM

So I bought the second 460 (Hooray for Amazon Prime free 2-day shipping!) and it turns out I have enough power to OC it to 850MHz and 2100MHz for the memory clock. These are both Step-up eligible through EVGA, so I could potentially get 2 470s or a 480 out of these two cards in a couple of months....
September 24, 2010 4:02:24 AM

Your current PSU can handle just fine. I had on oced i7 and 2x5870 on a Eathwatts 650w with no problems at all.. My battery backup never showed a consumption wattage above 450watts even during heavy gaming.

PSU watts is just hype, amps/stability/quality is more important and Antec is as good as it gets. You will be fine.

Cheers.
!