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another how large a psu do i need post

post #1 of 9
Thread Starter 
hey guys, building a new system and have decided on most the components except the psu. I'm not sure on how high a wattage rating I need. When I use the calculators on newegg and corsair they say I need 1000 watts or more, but that just seems a bit high to me for this system, which I think would be fine with an 850w. Here's the system specs, let me know what you guys think, thanks in advance.

case: silverstone fortress ft02b-w
mobo: asus crosshair iv formula
cpu: amd phenom II x6 1090T black edition (will oc but nothing extreme)
graphix: asus radeon 6970 2gb factory oc'd
ram: g.skill flare 8gb (4x2gb) ddr3 2000 w/air cooler
ssd: haven't decided which one yet
hhd's: (wd caviar green 2tb) & (samsung f4 2tb 5400rpm) in raid 1
optical: LG 10x blu-ray burner
cpu cooler: haven't decided but will be radiator w/heat pipes + 2 fans in push/pull
lighting: probably put a few blue ccfl's, make it look pritty
usb: keyboard, mouse, gamepad, webcam...usual stuff

also want to put in a 5.25" bay multi-card reader (if I can find one that doesn't....suck), and a 5.25" bay multimedia screen with some temperature probes. Latter on down the road I may want to add another 6970 and crossfire so want to make sure have enough power for that too.
post #2 of 9
Will you be adding another gpu down the road?

Edit and whats your budget?
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CPUMotherboardGraphicsRAM
2500k @5ghz Asus P8P67 Evo 6970 @ 1000/1450 8GB Ripjaws DDR31600 Cas8 
Hard DriveCoolingOSMonitor
Samsung 850 Pro 128GB + WD 1TB XSPC Rasa,RX360,D5 w/EK top,Ek150 res,AP-15's 7 Pro Asus VW266H 
KeyboardPowerCase
G11 AX850 Corsair 800D 
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CPUMotherboardGraphicsRAM
2500k @5ghz Asus P8P67 Evo 6970 @ 1000/1450 8GB Ripjaws DDR31600 Cas8 
Hard DriveCoolingOSMonitor
Samsung 850 Pro 128GB + WD 1TB XSPC Rasa,RX360,D5 w/EK top,Ek150 res,AP-15's 7 Pro Asus VW266H 
KeyboardPowerCase
G11 AX850 Corsair 800D 
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post #3 of 9
650W-750W tops
post #4 of 9
Well, if yer planning to add a second 6970 (not sure of the power draw), and water cooling as well, I would look into the 1000-1200w range (good overhead), just to future proof your rig for your planned upgrades.
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8120FX Gigabyte GA-990FXA-UD7 2ea MSI r9-270x 16gb G-Skill Snipers 
Hard DriveOptical DriveCoolingOS
WD 3x1tb greens, 1x1tb black Adata S599 120gb LG DVDR/RW, LG Blueray CM V8 Win7 64bit 
MonitorKeyboardPowerCase
LG2762D Microsoft Antec TPN-750 CM HAF 932 
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Microsoft X5 Generic 
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CPUMotherboardGraphicsRAM
8120FX Gigabyte GA-990FXA-UD7 2ea MSI r9-270x 16gb G-Skill Snipers 
Hard DriveOptical DriveCoolingOS
WD 3x1tb greens, 1x1tb black Adata S599 120gb LG DVDR/RW, LG Blueray CM V8 Win7 64bit 
MonitorKeyboardPowerCase
LG2762D Microsoft Antec TPN-750 CM HAF 932 
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post #5 of 9
If you're going to stick to a single GPU, a good 550W. If not, 750W.
post #6 of 9
Quote:
Originally Posted by Obakemono View Post
Well, if yer planning to add a second 6970 (not sure of the power draw), and water cooling as well, I would look into the 1000-1200w range (good overhead), just to future proof your rig for your planned upgrades.
Absolutely ridiculous, unless he's going Quad-Fire 6970s, and even then it's on the excessive side.


A 750W will do CFX 6970s under water easily.
post #7 of 9
Quote:
Originally Posted by Phaedrus2129 View Post
Absolutely ridiculous, unless he's going Quad-Fire 6970s, and even then it's on the excessive side.


A 750W will do CFX 6970s under water easily.
Good point. And you are correct, along with the PSU calculator. My bad.
Edited by Obakemono - 12/27/10 at 12:06pm
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Hard DriveOptical DriveCoolingOS
WD 3x1tb greens, 1x1tb black Adata S599 120gb LG DVDR/RW, LG Blueray CM V8 Win7 64bit 
MonitorKeyboardPowerCase
LG2762D Microsoft Antec TPN-750 CM HAF 932 
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Microsoft X5 Generic 
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BULLDOZER!!!
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CPUMotherboardGraphicsRAM
8120FX Gigabyte GA-990FXA-UD7 2ea MSI r9-270x 16gb G-Skill Snipers 
Hard DriveOptical DriveCoolingOS
WD 3x1tb greens, 1x1tb black Adata S599 120gb LG DVDR/RW, LG Blueray CM V8 Win7 64bit 
MonitorKeyboardPowerCase
LG2762D Microsoft Antec TPN-750 CM HAF 932 
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Microsoft X5 Generic 
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post #8 of 9
Thread Starter 
Thanks everyone for all the advice, I had a feeling 1000w was excessive. I wonder why the psu calculators on newegg and corsair were recommending such high psu's, (*cough* maybe because they're more expensive *cough*)...anyway, your probably right that 750w will be enough even with the second 6970, but I'm going to err on the side of caution and go with an 850w.

thanks again, cheers
post #9 of 9
850W will leave you with plenty of extra headroom for future upgrades.
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