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PSU for SLI 8800GTX?

post #1 of 12
Thread Starter 
With another 8800GTX in the mail, I realized that I'm going to need a new PSU to handle both of them in SLI.

I have found some Power Supplies that may be options:

Silverstone ST75F 750W

PC Power & Cooling S75QB 750W

OCZ EliteXStream OCZ800EXS 800W

Corsair CMPSU-750TX 750W

One of these, or a different one? What are your thoughts/suggestions?

Thanks in advance.
    
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Intel Q6600 G0 @ 3.6GHz (lapped) EVGA 780i SLI FTW @ 1600MHz FSB 2 x EVGA 8800GTX 768MB (SLI) @ 625/1500/2000MHz 2x2GB G.Skill PC2-8000 PQ @ 800MHz (linked to FSB) 
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Intel Q6600 G0 @ 3.6GHz (lapped) EVGA 780i SLI FTW @ 1600MHz FSB 2 x EVGA 8800GTX 768MB (SLI) @ 625/1500/2000MHz 2x2GB G.Skill PC2-8000 PQ @ 800MHz (linked to FSB) 
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post #2 of 12
700 watt isnt going to handle it? Bro think of stuff for the future. Get a 1000 watt so that if you want 3way you wont have 2 buy another psu after that.
Mobstanator
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Mobstanator
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post #3 of 12
Silverstone ST75F 750W

PC Power & Cooling S75QB 750W

Best of the best but get a 1000w for future
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The up/downgrade
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CPUMotherboardGraphicsRAM
|Intel 6800K @ 4ghz 1.24v| |Asus ROG Strix X99| |Gainward GTX 1070 @ ~2ghz| |4x4gb Corsair XMS 3000mhz CL14| 
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|840 Pro 256gb| |OCZ Vertex 2 120gb| |WD Red 2tb| |Windows 10 Pro x64| |27" QNIX QX2710 @ 2560x1440 120hz| |Logitech G810 Orion Spectrum RGB| 
PowerCaseMouseAudio
|EVGA SuperNOVA 1000 G2| |Corsair 750D| |Logitech G502 Proteus Spectrum RGB|  |JBL L890 speakers| 
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post #4 of 12
Thread Starter 
Quote:
Originally Posted by Mobsta21 View Post
700 watt isnt going to handle it? Bro think of stuff for the future. Get a 1000 watt so that if you want 3way you wont have 2 buy another psu after that.
Total output in Watts is not the problem. My current PSU (Ultra 700W XVS) has only 40 Amps on a single 12V Rail. This is not enough to power two 8800GTX's.

I never, ever plan on going for Tri-SLI.

Quote:
Originally Posted by go4life View Post
Silverstone ST75F 750W

PC Power & Cooling S75QB 750W

Best of the best but get a 1000w for future
Thank you.

I never plan on going Tri-SLI, and will eventually build a completely new rig and sell this one or use it as backup. A 1000W PSU is unnecessary for me.
Edited by Choggs396 - 6/27/08 at 6:17pm
    
CPUMotherboardGraphicsRAM
Intel Q6600 G0 @ 3.6GHz (lapped) EVGA 780i SLI FTW @ 1600MHz FSB 2 x EVGA 8800GTX 768MB (SLI) @ 625/1500/2000MHz 2x2GB G.Skill PC2-8000 PQ @ 800MHz (linked to FSB) 
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2x160GB WD RAID 0, 750GB Samsung Spinpoint F1 LITE-ON 20X SATA DVD/CD RW Windows 7 Ultimate x64 Viewsonic VA2702w 27" LCD 1920x1080 
KeyboardPowerCaseMouse
Logitech Value 100 (beer magnet) Corsair TX 750W Cooler Master ATCS 840 Logitech SBF-90 (cheapest one on Newegg) 
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Some kinda rubber thing (beer magnet) 
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CPUMotherboardGraphicsRAM
Intel Q6600 G0 @ 3.6GHz (lapped) EVGA 780i SLI FTW @ 1600MHz FSB 2 x EVGA 8800GTX 768MB (SLI) @ 625/1500/2000MHz 2x2GB G.Skill PC2-8000 PQ @ 800MHz (linked to FSB) 
Hard DriveOptical DriveOSMonitor
2x160GB WD RAID 0, 750GB Samsung Spinpoint F1 LITE-ON 20X SATA DVD/CD RW Windows 7 Ultimate x64 Viewsonic VA2702w 27" LCD 1920x1080 
KeyboardPowerCaseMouse
Logitech Value 100 (beer magnet) Corsair TX 750W Cooler Master ATCS 840 Logitech SBF-90 (cheapest one on Newegg) 
Mouse Pad
Some kinda rubber thing (beer magnet) 
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post #5 of 12
700W ultra isn't going to handle it... not even close

The Corsair CMPSU-750TX 750W is my first choice. Second, the PC Power & Cooling S75QB 750W.

The other two I wouldn't even consider. The 'Strider' series is Silverstone's only mistake in the PSU market, and should simply be ignored (they're not *that* bad, but not very good either), while I'd never recommend anything OCZ whateverXStream. Most of these PSUs are based on an FSP platform that has a high ripple on the 12V rails at high loads.

The Corsair and PC P&C are very good PSUs though.

If you ever plan Tri-SLI, 1000W is an option indeed... but if you only have $150 or so, just get that Corsair 750W beast.
    
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250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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post #6 of 12
Yeah the Ultra isn't going to cut it. Any of those PSUs you listed would be fine with the Strider performing slightly behind the rest. For the price the Corsair from buy.com is about the best deal ATM.

edit: Gah, I was beat .
i7 monsta
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i7 monsta
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post #7 of 12
Quote:
Originally Posted by shinji2k View Post
Yeah the Ultra isn't going to cut it. Any of those PSUs you listed would be fine with the Strider performing slightly behind the rest. For the price the Corsair from buy.com is about the best deal ATM.
Gosh, how come I am not surprised to see you in this thread
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
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N/A 
  hide details  
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CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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post #8 of 12
I would also recommend the Thermaltake thoughpower 850w! I love mine! Stable as it goes
The up/downgrade
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CPUMotherboardGraphicsRAM
|Intel 6800K @ 4ghz 1.24v| |Asus ROG Strix X99| |Gainward GTX 1070 @ ~2ghz| |4x4gb Corsair XMS 3000mhz CL14| 
Hard DriveOSMonitorKeyboard
|840 Pro 256gb| |OCZ Vertex 2 120gb| |WD Red 2tb| |Windows 10 Pro x64| |27" QNIX QX2710 @ 2560x1440 120hz| |Logitech G810 Orion Spectrum RGB| 
PowerCaseMouseAudio
|EVGA SuperNOVA 1000 G2| |Corsair 750D| |Logitech G502 Proteus Spectrum RGB|  |JBL L890 speakers| 
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|Emotiva XDA-2 receiver| |2x Advanced Acoustic MAA-705 @ 200w 8ohm| 
  hide details  
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The up/downgrade
(14 items)
 
  
CPUMotherboardGraphicsRAM
|Intel 6800K @ 4ghz 1.24v| |Asus ROG Strix X99| |Gainward GTX 1070 @ ~2ghz| |4x4gb Corsair XMS 3000mhz CL14| 
Hard DriveOSMonitorKeyboard
|840 Pro 256gb| |OCZ Vertex 2 120gb| |WD Red 2tb| |Windows 10 Pro x64| |27" QNIX QX2710 @ 2560x1440 120hz| |Logitech G810 Orion Spectrum RGB| 
PowerCaseMouseAudio
|EVGA SuperNOVA 1000 G2| |Corsair 750D| |Logitech G502 Proteus Spectrum RGB|  |JBL L890 speakers| 
AudioAudio
|Emotiva XDA-2 receiver| |2x Advanced Acoustic MAA-705 @ 200w 8ohm| 
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post #9 of 12
Quote:
Originally Posted by Chozart View Post
Gosh, how come I am not surprised to see you in this thread
Heh, I'm bored. What else would I be doing ?
i7 monsta
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i7 920 [4.2GHz] [1.325V] ASUS P6T Deluxe V2 2x XFX 5870 [1000/1250] G.Skill 3x2GB 1600MHz 
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X25-M 80GB, 320GB WD Scorpio Black Vista x64 2007FP-3007WFP-2007FP-1080p 32" OCN Ducky Brown 
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Silverstone ST85F-P whiteOut G9 
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i7 monsta
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.2GHz] [1.325V] ASUS P6T Deluxe V2 2x XFX 5870 [1000/1250] G.Skill 3x2GB 1600MHz 
Hard DriveOSMonitorKeyboard
X25-M 80GB, 320GB WD Scorpio Black Vista x64 2007FP-3007WFP-2007FP-1080p 32" OCN Ducky Brown 
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Silverstone ST85F-P whiteOut G9 
  hide details  
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post #10 of 12
All are top line of PSU so can't go wrong with one of them but my vote to Corsair 750tx. Then PC 750 and new EliteXStream PSU from OCZ/PC.
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