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Is 750W psu not going to cut it for CF HD 6870?

post #1 of 10
Thread Starter 
I have a Corsair TX 750 psu to power my (currently unavailable) computer... but I put in my details into a power supply calculator and it said I can't cross fire HD 6870s =/

I thought 750W was more than enough to handle SLI or CF cards and then power an OC'd (might buy 2500k soon-ish once I get mobo back) cpu...
    
CPUMotherboardGraphicsRAM
i7 3770k Asus Z77 sabertooth HD Radeon 6870 CF Corsair Vengeance Blue 16gb 
Power
Corsair 750W 
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CPUMotherboardGraphicsRAM
i7 3770k Asus Z77 sabertooth HD Radeon 6870 CF Corsair Vengeance Blue 16gb 
Power
Corsair 750W 
  hide details  
Reply
post #2 of 10
it will power it
power supply calculators are not worth using
OoGhiJ MIQtxxXA
(13 items)
 
  
CPUMotherboardGraphicsRAM
q9550 E0 @3.825ghz Abit IX48-GT3 Tigerforce SPARKLE GTX470 850c/1800m 220 650c sli later 4GB DDR3 Mushkin blackline 7-8-7-24-1T 1200mhz 
Hard DriveOptical DriveOSMonitor
WD1tb +WD500gb +WD200gb not like I need one edge linux LG 22" w2240 +optiquest q71 
KeyboardPowerCaseMouse
Adesso MKB-135B Mechanical DELTA GPS-750B A 750w sleeved moded Kandalf LCS Razer Mamba 
Mouse Pad
don't got one or need one 
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OoGhiJ MIQtxxXA
(13 items)
 
  
CPUMotherboardGraphicsRAM
q9550 E0 @3.825ghz Abit IX48-GT3 Tigerforce SPARKLE GTX470 850c/1800m 220 650c sli later 4GB DDR3 Mushkin blackline 7-8-7-24-1T 1200mhz 
Hard DriveOptical DriveOSMonitor
WD1tb +WD500gb +WD200gb not like I need one edge linux LG 22" w2240 +optiquest q71 
KeyboardPowerCaseMouse
Adesso MKB-135B Mechanical DELTA GPS-750B A 750w sleeved moded Kandalf LCS Razer Mamba 
Mouse Pad
don't got one or need one 
  hide details  
Reply
post #3 of 10
You'll be A.O.K
post #4 of 10
i'm 90% sure that a good 650W would be enough for two 6870's
    
CPUMotherboardGraphicsRAM
athlon II x2 2.8:2500k cheapo giabyte:AsRock Extreme3 z68 gigabyte Super overclock 470 880/1760/1800 4 GB "value" ram: G.Skill 1600 
Hard DriveOSMonitorPower
Caviar Black 500GB XP Asus 24" XFX 750W 
Case
690 II 
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CPUMotherboardGraphicsRAM
athlon II x2 2.8:2500k cheapo giabyte:AsRock Extreme3 z68 gigabyte Super overclock 470 880/1760/1800 4 GB "value" ram: G.Skill 1600 
Hard DriveOSMonitorPower
Caviar Black 500GB XP Asus 24" XFX 750W 
Case
690 II 
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Reply
post #5 of 10
Thread Starter 
thanks
    
CPUMotherboardGraphicsRAM
i7 3770k Asus Z77 sabertooth HD Radeon 6870 CF Corsair Vengeance Blue 16gb 
Power
Corsair 750W 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 3770k Asus Z77 sabertooth HD Radeon 6870 CF Corsair Vengeance Blue 16gb 
Power
Corsair 750W 
  hide details  
Reply
post #6 of 10
Quote:
Originally Posted by 855211 View Post
i'm 90% sure that a good 650W would be enough for two 6870's


IT's true. I used a Seasonic x-650 with dual 6870's and an i3 at 4ghz
post #7 of 10
it should power it just fine
Silent Dominator
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TUF Inside
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Silent Dominator
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Classy Lady
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TUF Inside
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post #8 of 10
will definitely be plenty of power, really more than you actually need
ShadowForge
(12 items)
 
Defiant
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CarbonCat
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CPUMotherboardGraphicsRAM
Phenom II x6 1405T (unlocked Athlon II X4 640T) ASUS M5A99X EVO AM3+ Asus ENGTX470/2DI/1280MD5/V2 16 GB (4x4GB) G.Skill DDR3 1600 CAS9 1.35v 
Hard DriveHard DriveOptical DriveCooling
WD Caviar Blue 250 2.5" Laptop Drive WD Caviar Black 1TB 3.5" Pioneer BDR-203 BluRay Burner Corsair H60 push 
OSOSMonitorPower
Windows 7 Pro x64 Ubuntu 11.10 Samsung 40" 60hz  ANTEC NEO ECO 520W 
CaseMouse
NZXT Gamma Microsoft Bluetooth Notebook Mouse 5000 
CPUMotherboardGraphicsRAM
i7 - 2600k [5.0 1.42v] ASUS P8Z68 Deluxe Sapphire HD6950 2gb Dirt 3 Edition 8GB G.Skill DDR3 2133 CAS11 
Hard DriveOSMonitorKeyboard
60GB G.Skill Sniper + 2x1TB Spinpoint F3 Raid0 Win 7 Pro x64 ASUS VW266H Razer Blackwidow 
PowerCaseMouse
Seasonic X750 Gold Corsair Carbide 500R White G9 
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ShadowForge
(12 items)
 
Defiant
(14 items)
 
CarbonCat
(13 items)
 
CPUMotherboardGraphicsRAM
Phenom II x6 1405T (unlocked Athlon II X4 640T) ASUS M5A99X EVO AM3+ Asus ENGTX470/2DI/1280MD5/V2 16 GB (4x4GB) G.Skill DDR3 1600 CAS9 1.35v 
Hard DriveHard DriveOptical DriveCooling
WD Caviar Blue 250 2.5" Laptop Drive WD Caviar Black 1TB 3.5" Pioneer BDR-203 BluRay Burner Corsair H60 push 
OSOSMonitorPower
Windows 7 Pro x64 Ubuntu 11.10 Samsung 40" 60hz  ANTEC NEO ECO 520W 
CaseMouse
NZXT Gamma Microsoft Bluetooth Notebook Mouse 5000 
CPUMotherboardGraphicsRAM
i7 - 2600k [5.0 1.42v] ASUS P8Z68 Deluxe Sapphire HD6950 2gb Dirt 3 Edition 8GB G.Skill DDR3 2133 CAS11 
Hard DriveOSMonitorKeyboard
60GB G.Skill Sniper + 2x1TB Spinpoint F3 Raid0 Win 7 Pro x64 ASUS VW266H Razer Blackwidow 
PowerCaseMouse
Seasonic X750 Gold Corsair Carbide 500R White G9 
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post #9 of 10
Thread Starter 
will 2x 6870s bottleneck an i3 2100?
    
CPUMotherboardGraphicsRAM
i7 3770k Asus Z77 sabertooth HD Radeon 6870 CF Corsair Vengeance Blue 16gb 
Power
Corsair 750W 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 3770k Asus Z77 sabertooth HD Radeon 6870 CF Corsair Vengeance Blue 16gb 
Power
Corsair 750W 
  hide details  
Reply
post #10 of 10
Quote:
Originally Posted by Tori View Post
will 2x 6870s bottleneck an i3 2100?
read the OP
OoGhiJ MIQtxxXA
(13 items)
 
  
CPUMotherboardGraphicsRAM
q9550 E0 @3.825ghz Abit IX48-GT3 Tigerforce SPARKLE GTX470 850c/1800m 220 650c sli later 4GB DDR3 Mushkin blackline 7-8-7-24-1T 1200mhz 
Hard DriveOptical DriveOSMonitor
WD1tb +WD500gb +WD200gb not like I need one edge linux LG 22" w2240 +optiquest q71 
KeyboardPowerCaseMouse
Adesso MKB-135B Mechanical DELTA GPS-750B A 750w sleeved moded Kandalf LCS Razer Mamba 
Mouse Pad
don't got one or need one 
  hide details  
Reply
OoGhiJ MIQtxxXA
(13 items)
 
  
CPUMotherboardGraphicsRAM
q9550 E0 @3.825ghz Abit IX48-GT3 Tigerforce SPARKLE GTX470 850c/1800m 220 650c sli later 4GB DDR3 Mushkin blackline 7-8-7-24-1T 1200mhz 
Hard DriveOptical DriveOSMonitor
WD1tb +WD500gb +WD200gb not like I need one edge linux LG 22" w2240 +optiquest q71 
KeyboardPowerCaseMouse
Adesso MKB-135B Mechanical DELTA GPS-750B A 750w sleeved moded Kandalf LCS Razer Mamba 
Mouse Pad
don't got one or need one 
  hide details  
Reply
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