I've decided I want to put a bit more juice in my system, so I plan to Crossfire my SAPPHIRE 100282SR Radeon HD 5850 1GB. I've plugged these into this calculator, but some of the values I was unsure about in regards to overclocking and capacitor aging. This is what I have, and if I decide to add another graphics card, should I consider upping my PSU? Thank you in advance!
This might help-- this is the full system power usage in the Tom's 5850 review article:
Test system: (your system will use quite a bit less-- as you havent yet overclocked to 4ghz.)
Intel Core i7-975 Extreme (Bloomfield) 3.33 GHz, 6.4 GT/s, 8 MB L3 Cache, power-saving settings disabled
Overclocked to 4 GHz (25 * 160 MHz)
Asus Rampage II Extreme (LGA 1366) X58/ICH10, BIOS 1504
Corsair Dominator 6GB (3 x 2GB) DDR3-1600 8-8-8-24 @ 1,600 MHz
Intel SSDSA2MH160G2C1 160 GB SATA 3 Gb/s
Realtek RTC8111C, 1 Gbps
Graphics Cards ATI Radeon HD 5850 1GB
-The 920 you can OC to 4 Ghz at 1.35 volts
-If you use a hig quality PSU (9.5 or better at jonnyguru.com), use 10% capacitor aging ....add 5% for each 0.5 drop in performancerating .....not really scientific but it seems reasonable ....
If you must go OCZ, at least get the Z series....the *stream's have not been reviewed very well:
It's better than you think. That 560 watt figure is from the wall. Figuring 80% efficiency, the computer is using about 450 watts from the PSU. That means the PSU is running at about 65% load (450/700).