GTX 680 SLI and the HX850
Given the my system specs and the estimated psu calculation would my 3 year old HX850 still be good enough to power an extra GTX 680 on top of everything else I have in my rig. I know the 680 is quite efficient and lots others say even a good 750 watt PSU is good enough for SLIed 680's but given all the hard drives, fans, and the highly overclocked 920 I own would my 3 year old HX850 still be viable?
Motherboard: ASUS P6X58-E WS
Processor: Intel Core i7 920 D0 @ 4.01ghz
Memory: 24Gb (3x8gb) Corsair Vengeance 1600mhz RAM
Video Card: EVGA geForce GTX 680 SC
Hard Drive # 1: Western Digital Caviar Black 1TB
Hard Drive # 2: Western Digital Caviar Black 1TB
Hard Drive # 3: Western Digital Caviar Black 1TB (Raid 0)
Hard Drive # 4: Western Digital Caviar Black 1TB (Raid 0)
Optical Drive: LG BH12LS38
Case: Cooler Master HAF 932
Power Supply: Corsair HX850 (3 years old)
Sound Card: Sound Blaster Recon3D PCIe
PSU Calculation (from extreme.outervision.com):
You'll be fine.
I say your fine as well.
I can't remember if the 680s use less power then the 580s, but when I ran sli on 580s I could not run them and my CPU overclocked on a 850W power supply as I would end up pulling too much, cause video drivers to fail/crash and sort of get a soft crash. Seeing as you're using a more power hungry processor then what I'm using (2600k) I'd be very wary of running the 680s above stock.
I personally think you will be okay.
680 uses about 80W~ less per card on load compared to 580's.
One more question, assuming I slotted in another GTX 680 this year and next year If I were to swap the 920/X58 platfrom for LGA 2011/3930k + upgrade the H100 to a custom cooling loop would that warrant a PSU upgrade when I move to LGA 2011
If your main plan is upgrade upgrade, grab the AX1200i and forget about getting another PSU for 7 years :)
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