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650w power supply enough for i5-2500k and 6950cf/560ti-sli

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a b ) Power supply
January 6, 2012 8:47:32 PM

Building a new system and was wondering if a corsair tx650 would be enough to power an i5-2500k on an asus p8z68-v lx mono with dual hd6950's or 560ti's? Let me know, send me links, thanks.
a b ) Power supply
January 6, 2012 9:51:54 PM

The 6950s draw about 200W under load, the 560s around 160W. I think you could run it safely, but the PSU would be about tapped out.
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a b ) Power supply
January 6, 2012 9:55:13 PM

Yeah I'd recommend 750W, maybe even 850 if you have lots of HDDs and peripherals.
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a b ) Power supply
January 6, 2012 10:01:24 PM

FinneousPJ said:
Yeah I'd recommend 750W, maybe even 850 if you have lots of HDDs and peripherals.
I concur. If you're running a very basic system, a solid 650W can handle it provided it's got a good 12V rail. But if you want a beefier rig, an extra $20 - $30 for a 750W and peace of mind is worthwhile.
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January 6, 2012 10:37:16 PM

650W is fine for a single card, but it's pushing it for SLI. I've been running two 560 Ti's in SLI with a 2600K, four HDD's, an SSD, two DVD drives, a fan controller and 6.3 million fans for six plus months on a Corsair 750TX with absolutely zero problems (even with Prime 95 and Furmark running at the same time for 60+ minutes).
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a c 87 ) Power supply
January 7, 2012 11:12:39 AM

I agree with K1114; 6950s use less power than GTX 560 Tis on maximum load, despite having the higher TDP rating.
The problem with using two of either of those cards with the Corsair 650TXV2 is that it doesn't have enough PCIe connectors.

I would like to know where you are buying from so that I can make the most suitable recommendation for a unit which you should use.

The Asus P8Z68-V LX motherboard has an x16/x4 PCIe lane split, which is sub-optimal for pairing cards of the calibre of 6950s/GTX 560 Tis.
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a b ) Power supply
January 7, 2012 3:48:32 PM

Actually you can't even sli at 4x although cf will.
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January 7, 2012 4:09:24 PM

It will be fine however because your PSU is of high quality. Most people will recommend against it however that is just to take into account discrepancies and the ideal range of load to keep a PSU in is 50% to 60% under continuous load to keep it running at peak efficiency.
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January 7, 2012 4:12:57 PM

K1114 is right about 6950 using less power than a 560ti under load

RED TEAM FTW !
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a c 139 ) Power supply
January 7, 2012 4:18:51 PM

nikoli707 said:
Building a new system and was wondering if a corsair tx650 would be enough to power an i5-2500k on an asus p8z68-v lx mono with dual hd6950's or 560ti's? Let me know, send me links, thanks.


No

http://www.geforce.com/Hardware/GPUs/geforce-gtx-560ti/...

500 watts for 1st card. ......add 170 watts for second

You can easily pass 700 watts on a 2500k dual 560 system

http://extreme.outervision.com/psucalculatorlite.jsp

1 CPU
High End Desktop
Intel / 1155 / 90% TDP / 2500k
OC my cpu / 4600 MHZ / 1.35 v
2 sticks RAM
NVidia / 560 Ti x 2 SLI
1 HD / 1 SSD
1 BR Reader / DVD Writer
3 USB (KB, Mouse, Headphones)
1 Firewire (Camera)
4 120mm fans
2 200mm fans
90% load
10% capacitor aging (lowest possible choice)

625 watts and that's not overclocking the GPUs

http://www.overclockersclub.com/reviews/nvidia_asus_gtx...

Here we see the system draw for one stook 560 Ti's is 342 watts ..... overclocked that Asus 560 Ti Cu TOP is 446 watts

446 - 342 = 104 watts x 2 cards = 208 watts for GPU overlcocking

625 + 208 = 833 watts

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a b ) Power supply
January 7, 2012 5:25:30 PM

Silvune said:
I agree with K1114; 6950s use less power than GTX 560 Tis on maximum load, despite having the higher TDP rating.

Yeah, I just did a quick lookup on the TDP, so good call.
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