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Need advice selecting the appropriate PSU please.

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  • Power Supplies
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August 13, 2009 5:02:21 AM

Hey guys, I am building a nice little ditty here, and would like your take on how much power I should pump into this puppy to keep her going for 2-3+ years with upgrades.


The system entails:

Intel Core i7 920 Nehalem 2.66GHz LGA 1366 130W Quad-Core Processor Model BX80601920 - Retail

EVGA E758-A1 3-Way SLI (x16/x16/x8) LGA 1366 Intel X58 ATX Intel Motherboard - Retail

OCZ XMP Ready Series 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Voltage Desktop Memory Model OCZ3X1600LV6GK - Retail


Western Digital Caviar Green WD10EADS 1TB SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM

EVGA 896-P3-1255-AR GeForce GTX 260 Core 216 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail

COOLER MASTER COSMOS 1000 RC-1000-KSN1-GP Black/ Silver Steel ATX Full Tower Computer Case - Retail


I would like to have enough power to support another GTS 260 core 216 GPU, and 6GB (3*2GB) DDR3 1600 LV RAM. Hell, I may even do a Tri SLI set up in the future if the card goes down in price enough for me to justify the expense.



Thanks in advance for looking at my post, and even more thanks if you provided some advice :D 
-RedJason

More about : advice selecting psu

a b ) Power supply
August 13, 2009 5:34:28 AM

I think that 850w Corsair ^from ct1615 is the way you want to go if you're thinking of an eventual 3 way SLI. You're not cutting any corners on your top end system, no reason to go cheesy and cheap on your power supply.

*EDIT* Only 4 - PCIe connectors on the Corsair - sorry
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a b ) Power supply
August 13, 2009 5:51:55 AM

Tri-sli you will want to look @ 1kw+ for PSU. I say the 1kw corsair.
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a b ) Power supply
August 13, 2009 9:20:53 AM

dirtmountain said:
I think that 850w Corsair ^from ct1615 is the way you want to go if you're thinking of an eventual 3 way SLI. You're not cutting any corners on your top end system, no reason to go cheesy and cheap on your power supply.

The TX is a great PSU, but does not have the required connectors for 3 GTX260s.
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a b ) Power supply
August 13, 2009 9:22:03 AM

logainofhades said:
Tri-sli you will want to look @ 1kw+ for PSU. I say the 1kw corsair.

Not really necessary for 3 55nm GTX260s--they only use ~105W according to xbitlabs.

I would recommend the Corsair HX850.
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a b ) Power supply
August 13, 2009 9:50:00 AM

theAnimal said:
Not really necessary for 3 55nm GTX260s--they only use ~105W according to xbitlabs.

I would recommend the Corsair HX850.



Yea I was thinking more in line with GTX280's :oops: 
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August 13, 2009 11:41:20 AM

Don't bother the scaling for tri is horrible. You're better off packing a heavy hitter solo card like GTX 275 or 295 and then maybe double it when the price comes down.
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a c 243 ) Power supply
August 13, 2009 12:01:57 PM

theAnimal said:
Not really necessary for 3 55nm GTX260s

Or even 3 65nm versions.
A good quality 850 has no problem with an oc'ed I7 and a pair of GTX295's.
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August 14, 2009 2:18:12 AM

Amazing, thanks for the replies. I don't think I will ever actually go tri-SLI 260s, but if the price was right down the road, who knows...

So the general consensus is 850W will suit my needs quite swimmingly, and I should probably get rid of the 650W one I was looking to buy originally (which only has 2xPCIe lines as is)?

CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 ... - Retail
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August 14, 2009 4:40:53 AM

I've done more upgrades on my PSU than actual motherboard and processor because I was always finding myself short of that wanted FPS. In fact I have two old PSU laying around just from older video cards.

Tip for any noobs reading: throw down the cash for a descent PSU and save yourself the extra cash in the long-running.
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a b ) Power supply
August 14, 2009 6:07:51 AM

RedJason said:
Amazing, thanks for the replies. I don't think I will ever actually go tri-SLI 260s, but if the price was right down the road, who knows...

So the general consensus is 850W will suit my needs quite swimmingly, and I should probably get rid of the 650W one I was looking to buy originally (which only has 2xPCIe lines as is)?

CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 ... - Retail

Yes, TX750/850 or HX750/850 would be better for SLI.
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