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Can I run DUAL 7800 GTX's on my Antec TruePower 2.0 550W?

post #1 of 16
Thread Starter 
Alright here's my setup:

AMD X2 4200+ (old school 939 edition)

2 gigs of corsair xms PC 3200 memory

Asus A8N SLI Deluxe motherboard

Thermaltake Big Typhoon

Creative Audigy ZS sound card

3 x 120mm case fans on my Antec P180 case

Nothing is overclocked at the moment.

I have run this setup fine with a single BFG Tech 7800 GTX and I want to add a second. Will my PSU supply enough power do you think? Also, what if I decide to slightly overclock my proc?

Thanks!
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
X2 4200+ ASUS A8N-SLI Deluxe BFG Tech 7800 GTX Win XP Pro SP2 
MonitorKeyboardPowerCase
Apple 20" Cinema LCD Saitek Eclipse Antec 550W TruePower 2.0 Antec P180 
Mouse
Logitech MX510 
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My System
(13 items)
 
  
CPUMotherboardGraphicsOS
X2 4200+ ASUS A8N-SLI Deluxe BFG Tech 7800 GTX Win XP Pro SP2 
MonitorKeyboardPowerCase
Apple 20" Cinema LCD Saitek Eclipse Antec 550W TruePower 2.0 Antec P180 
Mouse
Logitech MX510 
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Reply
post #2 of 16
Oh yes! I ran 2 x 7800GTX's on the same PSU without any problems! Even with my current SLI setup it ran perfect

EDIT: It ran my 3.1ghz stable with everything in my PC
Server
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 930 @ 4ghz EVGA X58 SLI ATI 4870 12GB DDR3 1600mhz 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 4 120GB SDD, 4TB Seagates DVD-RW XSPC 360 Radiator Swiftech MCP355 w Petra block 
CoolingOSMonitorPower
Heatkiller Rev. 3 liquid cooling block Windows 7 X64 23" LG Flatron + 22" Acer OCZ GameXstreme 700watt 
Case
Corsair 700D 
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Server
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 930 @ 4ghz EVGA X58 SLI ATI 4870 12GB DDR3 1600mhz 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 4 120GB SDD, 4TB Seagates DVD-RW XSPC 360 Radiator Swiftech MCP355 w Petra block 
CoolingOSMonitorPower
Heatkiller Rev. 3 liquid cooling block Windows 7 X64 23" LG Flatron + 22" Acer OCZ GameXstreme 700watt 
Case
Corsair 700D 
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post #3 of 16
For two GeForce 7800 GTX-based graphics cards running in NVIDIA SLI configurations, a minimum 500W system power supply (with 12V rating of 34A) is recommended.
Coeus
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
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Coeus
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
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post #4 of 16
Thread Starter 
how do I find out the 12v rating on my PSU?
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
X2 4200+ ASUS A8N-SLI Deluxe BFG Tech 7800 GTX Win XP Pro SP2 
MonitorKeyboardPowerCase
Apple 20" Cinema LCD Saitek Eclipse Antec 550W TruePower 2.0 Antec P180 
Mouse
Logitech MX510 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
X2 4200+ ASUS A8N-SLI Deluxe BFG Tech 7800 GTX Win XP Pro SP2 
MonitorKeyboardPowerCase
Apple 20" Cinema LCD Saitek Eclipse Antec 550W TruePower 2.0 Antec P180 
Mouse
Logitech MX510 
  hide details  
Reply
post #5 of 16
should be a sticker on the side of your psu
Coeus
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
  hide details  
Reply
Coeus
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
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Reply
post #6 of 16
Thread Starter 
I don't think I have 34 A on the 12v rails but I have 50 more Watts than the minimum you suggested - will it compensate?
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
X2 4200+ ASUS A8N-SLI Deluxe BFG Tech 7800 GTX Win XP Pro SP2 
MonitorKeyboardPowerCase
Apple 20" Cinema LCD Saitek Eclipse Antec 550W TruePower 2.0 Antec P180 
Mouse
Logitech MX510 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
X2 4200+ ASUS A8N-SLI Deluxe BFG Tech 7800 GTX Win XP Pro SP2 
MonitorKeyboardPowerCase
Apple 20" Cinema LCD Saitek Eclipse Antec 550W TruePower 2.0 Antec P180 
Mouse
Logitech MX510 
  hide details  
Reply
post #7 of 16
If this is your PSU, then it will run fine.
My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.2 GHz ASUS Sabertooth z77 ASUS GTX 1060 Turbo Kingston HyperX Fury 16GB (2x8GB) 
Hard DriveHard DriveHard DriveOS
Mushkin Enhanced Chronos SSD Western Digital HD Seagate HD Windows 10 Pro 
MonitorMonitorPowerCase
Acer 24" LED 144hz Acer 24" LED 60hz SeaSonic S12II 620w Corsair Carbide Series 200R 
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My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.2 GHz ASUS Sabertooth z77 ASUS GTX 1060 Turbo Kingston HyperX Fury 16GB (2x8GB) 
Hard DriveHard DriveHard DriveOS
Mushkin Enhanced Chronos SSD Western Digital HD Seagate HD Windows 10 Pro 
MonitorMonitorPowerCase
Acer 24" LED 144hz Acer 24" LED 60hz SeaSonic S12II 620w Corsair Carbide Series 200R 
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post #8 of 16
ah, well then, you can run both of them on it...19amps on both rails equals 38 amps..


This is his here i believe

http://www.digiconcepts.com/antec_powersupplies_04.htm
The Crushanator
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel E6400 @ 3.36GHz DFI Blood Iron P35-T2RL Nvidia 260GTX 2x1GB Crucial Ballistix PC2-6400 
Hard DriveOSMonitorKeyboard
RAID 0 Seagate 7200.10 Windows XP Pro w/SP3 ViewSonic G220fb CRT A board with keys 
PowerCaseMouse
Sunbeamtech NUUO 550Watt Thermaltake Kandalf Tower Logitech Mx 518 
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The Crushanator
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel E6400 @ 3.36GHz DFI Blood Iron P35-T2RL Nvidia 260GTX 2x1GB Crucial Ballistix PC2-6400 
Hard DriveOSMonitorKeyboard
RAID 0 Seagate 7200.10 Windows XP Pro w/SP3 ViewSonic G220fb CRT A board with keys 
PowerCaseMouse
Sunbeamtech NUUO 550Watt Thermaltake Kandalf Tower Logitech Mx 518 
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Reply
post #9 of 16
You have 36A on your 12V
Server
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 930 @ 4ghz EVGA X58 SLI ATI 4870 12GB DDR3 1600mhz 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 4 120GB SDD, 4TB Seagates DVD-RW XSPC 360 Radiator Swiftech MCP355 w Petra block 
CoolingOSMonitorPower
Heatkiller Rev. 3 liquid cooling block Windows 7 X64 23" LG Flatron + 22" Acer OCZ GameXstreme 700watt 
Case
Corsair 700D 
  hide details  
Reply
Server
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 930 @ 4ghz EVGA X58 SLI ATI 4870 12GB DDR3 1600mhz 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 4 120GB SDD, 4TB Seagates DVD-RW XSPC 360 Radiator Swiftech MCP355 w Petra block 
CoolingOSMonitorPower
Heatkiller Rev. 3 liquid cooling block Windows 7 X64 23" LG Flatron + 22" Acer OCZ GameXstreme 700watt 
Case
Corsair 700D 
  hide details  
Reply
post #10 of 16
heres the specs:
http://www.antec.com/specs/TPII550_spe.html
Coeus
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
  hide details  
Reply
Coeus
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
  hide details  
Reply
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