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quadfire power supply

post #1 of 15
Thread Starter 
would a 1k watt PSU be enough for 6950's in quad or should i bump up to a 1250?

also, which do you suggest?
Current rig
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AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
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WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
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Current rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
PowerCase
CM SP 1200w, CM 750 Coolermaster Haf 932 
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post #2 of 15
Each GPU can draw upwards of 225 W maximum with the slider in the +20% position, so it might be close if you wish to overclock. I believe it will be 750 W from the GPUs alone in the ±0% position, so you sould be able do it if you wish to remain at stock.

AMD calls for a single HD 6950 to have at least a 500 W PSU, and a 600 W for two. Assuming that scales, they would say an 800 W would push four, but I am skeptical, since my rig draws about 900 W if I remember correctly.
     
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Samsung Spinpoint F3 HD103SJ Hitachi Deskstar 5K3000 HDS5C3020ALA632 Hitachi Deskstar 7K1000 HDS721075KLA330 Hitachi X Mobile 
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LG CH08LS10 (SATA BD-R / DVD±R / CD-RW) Prolimatech Megashadow Scythe S-Flex SFF21G x2 Scythe S-Flex SFF21F x2 
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post #3 of 15
Thread Starter 
I will be overclocking and unlocking the shaders so my guess was somewhere around 240 per card. Hw monitor says I'm drawing around 120 for my CPU, so it'd be close at full load with a 1k. Would it be better to go with the 1200 so Im not running at 100% pus load?
Current rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
PowerCase
CM SP 1200w, CM 750 Coolermaster Haf 932 
  hide details  
Reply
Current rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
PowerCase
CM SP 1200w, CM 750 Coolermaster Haf 932 
  hide details  
Reply
post #4 of 15
Quote:
Originally Posted by steamboat View Post
I will be overclocking and unlocking the shaders so my guess was somewhere around 240 per card. Hw monitor says I'm drawing around 120 for my CPU, so it'd be close at full load with a 1k. Would it be better to go with the 1200 so Im not running at 100% pus load?
Are you going to run 4 6950s on a B55?

The PSU will be fine if it's a quality unit but the CPU isn't going to cut it.
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Pernod
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Oleo
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The Sidewinder
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Intel Xeon E5-4650 Intel Xeon E5-4650 Asus Z9PE-D8 WS GeForce GTX 780 Ti 
RAMRAMHard DriveHard Drive
4 x 4GB Corsair Dominator Platinum 4 x 4GB Corsair Dominator Platinum Samsung Spinpoint F3 2TB Sandisk Ultra 64GB 
Hard DriveCoolingCoolingCooling
mushkin Triactor 240GB EK Supremacy Nickel/Plexi EK Supremacy Nickel/Plexi TFC XChanger 360 
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Koolance RP452X2 Swiftech MCP-655 Corsair SP120 "QE" Windows 10 Enterprise x64 
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post #5 of 15
I would go for the Ultra X3 1600w
post #6 of 15
In my opinion, a 1000 W would not be enough if you want to unlock the shaders. You would have to assume each would be drawing close to its 225 W theoretical max, so that is 900 W right there, 120 W for the CPU, and you are over before you even consider the hard drive, RAM, fan(s), et cetera. You would need at least an 1100 W, 1200 W would be better.
     
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Intel Core i7-3770k ASRock Z77 Extreme6 LGA 1155 EVGA GeForce GTX 780 FTW (03G-P4-3784-KR) Crucial Ballistix Sport 
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Samsung Spinpoint F3 HD103SJ Hitachi Deskstar 5K3000 HDS5C3020ALA632 Hitachi Deskstar 7K1000 HDS721075KLA330 Hitachi X Mobile 
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LG CH08LS10 (SATA BD-R / DVD±R / CD-RW) Prolimatech Megashadow Scythe S-Flex SFF21G x2 Scythe S-Flex SFF21F x2 
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Thermalright TR-FDB-1600 x4 XCLIO Amazing Fan 250mm Scythe Kama Bay SCKB-1000BK x3 Windows 7 Home Premium x64 SP1 
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Windows XP Home x64 SP3 (via Virtualbox) Fedora 15 LXDE (via Virtualbox) Slackware Linux XFCE (via Virtualbox) DOS 5.0 (via DOSbox) 
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LG 47LH40 Acer G276HL Gbd Acer G276HL Gbd Unicomp Classic 104 Black Buckling Spring PS2 
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Intel Core 2 Duo T7700 Merom Toshiba ISRAA 1.0 (Socket 479) ATI Mobility Radeon HD2600 modded CCC 10.6 OCZ2MV6674GK 
Hard DriveHard DriveOptical DriveCooling
Hitachi Travelstar 7K500 HD20500 Western Digital Caviar Blue (WD6400BEVT-22A0RT0) Matshita DVD-RAM UJ-850S ATA Stock heatpipe system 
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Thermaltake Massive23 CS Windows 7 Home Premium x64 SP1 Windows XP Home x64 SP3 (via Virtualbox) DOS 5.0 (via DOSbox) 
MonitorKeyboardPowerCase
17.0" Diagonal Widescreen WSXGA+ Internal only 19 V, 6.32 A Stock 17" Satellite shell (8.5 lbs) 
MouseMouse PadAudioAudio
Logitech G500 Small generic black foam mat HP Thin USB Powered Speakers Fiio E5 Headphone Amplifier 
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Griffin iTrip P1141 Microsoft GPS 168 Toshiba Backpack PA1366U-1NCS 
CPUMotherboardGraphicsRAM
AMD Athlon XP-M 2500+ Barton Hewlett-Packard 0024 ATI Mobility Radeon IGP-320M Crucial CT6464X265.16FG 
Hard DriveOptical DriveCoolingOS
Toshiba MK4021GAS Toshiba SD-R2512 Stock heatpipes Windows XP Home SP3 
MonitorKeyboardPowerCase
15.0" XGA TFT Internal only 18.5 V, 4.9 A Stock 15" Pavilion Shell (8 lbs) 
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CPUMotherboardGraphicsRAM
Intel Core i7-3770k ASRock Z77 Extreme6 LGA 1155 EVGA GeForce GTX 780 FTW (03G-P4-3784-KR) Crucial Ballistix Sport 
Hard DriveHard DriveHard DriveHard Drive
Samsung Spinpoint F3 HD103SJ Hitachi Deskstar 5K3000 HDS5C3020ALA632 Hitachi Deskstar 7K1000 HDS721075KLA330 Hitachi X Mobile 
Optical DriveCoolingCoolingCooling
LG CH08LS10 (SATA BD-R / DVD±R / CD-RW) Prolimatech Megashadow Scythe S-Flex SFF21G x2 Scythe S-Flex SFF21F x2 
CoolingCoolingCoolingOS
Thermalright TR-FDB-1600 x4 XCLIO Amazing Fan 250mm Scythe Kama Bay SCKB-1000BK x3 Windows 7 Home Premium x64 SP1 
OSOSOSOS
Windows XP Home x64 SP3 (via Virtualbox) Fedora 15 LXDE (via Virtualbox) Slackware Linux XFCE (via Virtualbox) DOS 5.0 (via DOSbox) 
MonitorMonitorMonitorKeyboard
LG 47LH40 Acer G276HL Gbd Acer G276HL Gbd Unicomp Classic 104 Black Buckling Spring PS2 
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Microsoft Strategic Commander UPEK Eikon Digital Privacy Manager Logitech G27 Playseat Revolution (NASCAR) 
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Playseat Revolution Gearshift Holder Sony DualShock 3 Microsoft Lifecam VX-1000 D-Link DBT-120 
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APC SMT1500 HP Photosmart 3210xi All-in-One 
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Intel Core 2 Duo T7700 Merom Toshiba ISRAA 1.0 (Socket 479) ATI Mobility Radeon HD2600 modded CCC 10.6 OCZ2MV6674GK 
Hard DriveHard DriveOptical DriveCooling
Hitachi Travelstar 7K500 HD20500 Western Digital Caviar Blue (WD6400BEVT-22A0RT0) Matshita DVD-RAM UJ-850S ATA Stock heatpipe system 
CoolingOSOSOS
Thermaltake Massive23 CS Windows 7 Home Premium x64 SP1 Windows XP Home x64 SP3 (via Virtualbox) DOS 5.0 (via DOSbox) 
MonitorKeyboardPowerCase
17.0" Diagonal Widescreen WSXGA+ Internal only 19 V, 6.32 A Stock 17" Satellite shell (8.5 lbs) 
MouseMouse PadAudioAudio
Logitech G500 Small generic black foam mat HP Thin USB Powered Speakers Fiio E5 Headphone Amplifier 
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Griffin iTrip P1141 Microsoft GPS 168 Toshiba Backpack PA1366U-1NCS 
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AMD Athlon XP-M 2500+ Barton Hewlett-Packard 0024 ATI Mobility Radeon IGP-320M Crucial CT6464X265.16FG 
Hard DriveOptical DriveCoolingOS
Toshiba MK4021GAS Toshiba SD-R2512 Stock heatpipes Windows XP Home SP3 
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15.0" XGA TFT Internal only 18.5 V, 4.9 A Stock 15" Pavilion Shell (8 lbs) 
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post #7 of 15
Thread Starter 
I'm upgrading the CPU as soon as bulldozer comes out. I'm not worried about bottlenecking as what I'll be using it for doesn't take much cpu
Current rig
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CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
PowerCase
CM SP 1200w, CM 750 Coolermaster Haf 932 
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Current rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
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CM SP 1200w, CM 750 Coolermaster Haf 932 
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post #8 of 15
I have seen first hand a 6990 and a 6907 tri-fire pull around 845 watts.

Hope that helps a little
From FX to i7
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post #9 of 15
Quote:
Originally Posted by steamboat View Post
I'm upgrading the CPU as soon as bulldozer comes out. I'm not worried about bottlenecking as what I'll be using it for doesn't take much cpu
Well, it's actually none my business , but if you're going to game on it you'll get really low GPU usage. But Bulldozer should be fine.
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Intel Xeon E5-4650 Intel Xeon E5-4650 Asus Z9PE-D8 WS GeForce GTX 780 Ti 
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4 x 4GB Corsair Dominator Platinum 4 x 4GB Corsair Dominator Platinum Samsung Spinpoint F3 2TB Sandisk Ultra 64GB 
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mushkin Triactor 240GB EK Supremacy Nickel/Plexi EK Supremacy Nickel/Plexi TFC XChanger 360 
CoolingCoolingCoolingOS
Koolance RP452X2 Swiftech MCP-655 Corsair SP120 "QE" Windows 10 Enterprise x64 
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openSUSE Leap 42.1 x64 Dell U2412M Dell U2412M Acer P241W-d 
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Ducky 1008 w/ Cherry MX Blue Coolermaster Silent Pro M2 1.5kW Silverstone Raven RV01B-W Microsoft Sidewinder X5 
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Asus Xonar DX Beyerdynamic DT 880 Premium AudioEngine A2 (2.0) Wacom Intuos Pen & Touch 
CPUMotherboardGraphicsRAM
Core i7 2600K @5.2  MSI MPower Z77 GeForce GTX 470 Corsair Vengeance 2000MHz C10 
Hard DriveCoolingCoolingCooling
Samsung Spinpoint F1 XSPC Raystorm EK Spin Bay Res Clear mcp-350 (ddc1) 
CoolingCoolingOSOS
XSPC EX120 XSPC EX240 openSUSE 12.3 x64 elementaryOS 0.3 (Freya) x64 
PowerCase
Corsair TX750 750W Lian Li A05NB 
CPUMotherboardGraphicsRAM
Intel C2Q Q9550 Asus P5G41C-M LX GeForce GTX 470 Corsair XMS2 DDR2 800 
Hard DriveHard DriveHard DriveHard Drive
Seagate LP 500GB Crucial M4 128GB WD Red 2TB WD Red 4TB 
CoolingOSMonitorPower
Scythe Big Shuriken w/ Silverstone Suscool 121 Windows 10 Home x64 Sony Bravia KDL-37EX500 Antec TP650 New 
CaseOther
Lian Li V351B Silverstone Suscool 121 120mm case fans 
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Pernod
(28 items)
 
Oleo
(14 items)
 
The Sidewinder
(18 items)
 
CPUCPUMotherboardGraphics
Intel Xeon E5-4650 Intel Xeon E5-4650 Asus Z9PE-D8 WS GeForce GTX 780 Ti 
RAMRAMHard DriveHard Drive
4 x 4GB Corsair Dominator Platinum 4 x 4GB Corsair Dominator Platinum Samsung Spinpoint F3 2TB Sandisk Ultra 64GB 
Hard DriveCoolingCoolingCooling
mushkin Triactor 240GB EK Supremacy Nickel/Plexi EK Supremacy Nickel/Plexi TFC XChanger 360 
CoolingCoolingCoolingOS
Koolance RP452X2 Swiftech MCP-655 Corsair SP120 "QE" Windows 10 Enterprise x64 
OSMonitorMonitorMonitor
openSUSE Leap 42.1 x64 Dell U2412M Dell U2412M Acer P241W-d 
KeyboardPowerCaseMouse
Ducky 1008 w/ Cherry MX Blue Coolermaster Silent Pro M2 1.5kW Silverstone Raven RV01B-W Microsoft Sidewinder X5 
AudioAudioAudioOther
Asus Xonar DX Beyerdynamic DT 880 Premium AudioEngine A2 (2.0) Wacom Intuos Pen & Touch 
CPUMotherboardGraphicsRAM
Core i7 2600K @5.2  MSI MPower Z77 GeForce GTX 470 Corsair Vengeance 2000MHz C10 
Hard DriveCoolingCoolingCooling
Samsung Spinpoint F1 XSPC Raystorm EK Spin Bay Res Clear mcp-350 (ddc1) 
CoolingCoolingOSOS
XSPC EX120 XSPC EX240 openSUSE 12.3 x64 elementaryOS 0.3 (Freya) x64 
PowerCase
Corsair TX750 750W Lian Li A05NB 
CPUMotherboardGraphicsRAM
Intel C2Q Q9550 Asus P5G41C-M LX GeForce GTX 470 Corsair XMS2 DDR2 800 
Hard DriveHard DriveHard DriveHard Drive
Seagate LP 500GB Crucial M4 128GB WD Red 2TB WD Red 4TB 
CoolingOSMonitorPower
Scythe Big Shuriken w/ Silverstone Suscool 121 Windows 10 Home x64 Sony Bravia KDL-37EX500 Antec TP650 New 
CaseOther
Lian Li V351B Silverstone Suscool 121 120mm case fans 
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post #10 of 15
Thread Starter 
I do game, but my two current cards are more than enough, the other two are for something else

I'm considering the CM silent pro 1200
Current rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
PowerCase
CM SP 1200w, CM 750 Coolermaster Haf 932 
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Current rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD PII B55 3.2 oc-4.2ghz Gigabyte 990 UD7 XFX x2, MSI x2 unlocked 6950 950/1325 16GB G.Skill ddr3 1600 
Hard DriveCoolingOSMonitor
WD black 1T noctua nh-d14 Win 7 64 Ultimate Samsung 27", LG 23" 
PowerCase
CM SP 1200w, CM 750 Coolermaster Haf 932 
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