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6850 on a 460W PSU?

post #1 of 19
Thread Starter 
my PSU is a 460W PSU with 385W on the 12v rail giving 32A. my pc is really simple:

intel i7 2600
8gb ram 1333mhz
1 hard drive 1tb 7200rpm
2 fans only: fan on psu and fan on top of cpu heatsink

So keep in mind my cpu is not overclocked (never will, cant anyways), i do not have a lot of fans like some people, and i only have 1 hard drive, not multiple like some people.

Will my PSU support a ATI RADEON HD 6850?
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
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DELL XPS 8300
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CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
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post #2 of 19
It depends on what PSU exactly it is that you have. A 6850 on that rig would EASILY run off a 350-400w unit. Just depends on what the unit is.
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Junkyard
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NAStradamous
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HTPC01
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CPUMotherboardGraphicsRAM
Intel i5 2320 @ 3.1GHz MSI B75MA-E33 HIS HD7970 3GB @ 1050 / 1700, 1.17v Patriot 2x4GB DDR3-1066 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 256GB WD Green 2TB DVDRW Corsair H50 Push / Pull 
CoolingOSMonitorMonitor
NZXT 120mm fans strapped to stock 7970 cooler Windows 10 Pro Dell 3007WFP Dell 2007FP 
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Dell 2007FP Cheap Toshiba (R.I.P. Ducky) PC Power & Cooling Silencer MKIII 950w Cheap Garbage (free) 
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Logitech G602 Yardsale Special 
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Intel Core i5 3330 Asus H61 MSI GTX 750Ti Low Profile 2x4GB Hynix DDR3-1333 
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60GB Kingston SSD 1TB Seagate Samsung DVDRW CoolerMaster Gemin II 
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Windows 8.1 + Steam Big Picture / Plex HT 50" Insignia LED 1080p Logitech Rosewill Green 530w 
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post #3 of 19
Thread Starter 
i gave all the relevant details of the PSU, namely the 12v rails. Do you need more info on the volts? Or do you want the brand of the PSU?

It is a prebuilt (Dell XPS 8300) so I dont know the brand of the PSU, i looked at it on the case and there is only the label with the volts info.

edit: also im asking about the 6850 because im concious of my low psu wattage, and the 6850 is very power efficient having a max load consumption of 127W
Edited by kiurys - 2/20/11 at 3:08pm
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
  hide details  
Reply
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
  hide details  
Reply
post #4 of 19
Quote:
Originally Posted by kiurys View Post
i gave all the relevant details of the PSU, namely the 12v rails. Do you need more info on the volts? Or do you want the brand of the PSU?

It is a prebuilt (Dell XPS 8300) so I dont know the brand of the PSU, i looked at it on the case and there is only the label with the volts info.

edit: also im asking about the 6850 because im concious of my low psu wattage, and the 6850 is very power efficient having a max load consumption of 127W
Wait...according to this site, it already comes with a HD5870 installed. If that's true, than you would have no reason to buy a 6850 as that's a downgrade.

Your PSU should be able to handle a moderate gaming card easy enough. The newer Dell's have pretty decent low end units in them.
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Intel i5 2320 @ 3.1GHz MSI B75MA-E33 HIS HD7970 3GB @ 1050 / 1700, 1.17v Patriot 2x4GB DDR3-1066 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 256GB WD Green 2TB DVDRW Corsair H50 Push / Pull 
CoolingOSMonitorMonitor
NZXT 120mm fans strapped to stock 7970 cooler Windows 10 Pro Dell 3007WFP Dell 2007FP 
MonitorKeyboardPowerCase
Dell 2007FP Cheap Toshiba (R.I.P. Ducky) PC Power & Cooling Silencer MKIII 950w Cheap Garbage (free) 
MouseAudio
Logitech G602 Yardsale Special 
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Intel Core i5 3330 Asus H61 MSI GTX 750Ti Low Profile 2x4GB Hynix DDR3-1333 
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60GB Kingston SSD 1TB Seagate Samsung DVDRW CoolerMaster Gemin II 
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Windows 8.1 + Steam Big Picture / Plex HT 50" Insignia LED 1080p Logitech Rosewill Green 530w 
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Junkyard
(18 items)
 
NAStradamous
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HTPC01
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CPUMotherboardGraphicsRAM
Intel i5 2320 @ 3.1GHz MSI B75MA-E33 HIS HD7970 3GB @ 1050 / 1700, 1.17v Patriot 2x4GB DDR3-1066 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 256GB WD Green 2TB DVDRW Corsair H50 Push / Pull 
CoolingOSMonitorMonitor
NZXT 120mm fans strapped to stock 7970 cooler Windows 10 Pro Dell 3007WFP Dell 2007FP 
MonitorKeyboardPowerCase
Dell 2007FP Cheap Toshiba (R.I.P. Ducky) PC Power & Cooling Silencer MKIII 950w Cheap Garbage (free) 
MouseAudio
Logitech G602 Yardsale Special 
CPUMotherboardGraphicsRAM
Intel Core i5 3330 Asus H61 MSI GTX 750Ti Low Profile 2x4GB Hynix DDR3-1333 
Hard DriveHard DriveOptical DriveCooling
60GB Kingston SSD 1TB Seagate Samsung DVDRW CoolerMaster Gemin II 
OSMonitorKeyboardPower
Windows 8.1 + Steam Big Picture / Plex HT 50" Insignia LED 1080p Logitech Rosewill Green 530w 
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Silverstone HTPC Logitech Pioneer 2.0 tower speakers + 135w RMS Rosewill MCE Remote 
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post #5 of 19
Thread Starter 
I currently have a 5670 on my system. I didnt mention it because i thought it was irrelevant.
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
  hide details  
Reply
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
  hide details  
Reply
post #6 of 19
6850 requires one 6-pin PCIe power connector. Does the power supply have one?



A 6850 should be able to run off your power supply. I ran a 6850 off a 400W power supply (Corsair CX400) with 30A on the +12v rail for a friend's build.
Edited by Riou - 2/20/11 at 3:24pm
post #7 of 19
Quote:
Originally Posted by kiurys View Post
I currently have a 5670 on my system. I didnt mention it because i thought it was irrelevant.
Don't worry pioneer is just making sure, it would be a big help if you could put your rig specs in your sig, because then we dont have to ask as many questions.
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post #8 of 19
OP, here are some numbers:
Radeon HD 6850-127 Watts
Radeon HD 4870-150 Watts

I'm running my 4870 with 22A on the 12v rail with No issues at all for half a year now, so you'll have no problem. You have more amps and a lower-power card.
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My Rig
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Ex-wife's Rig
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
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post #9 of 19
Thread Starter 
Wouldnt that 22A be on a *single* 12v rail and not on all combined?

My psu has 3 rails:

+12VA 18A
+12VB 16A
+12VC 8A

and the following is literally taken from the label of my psu:

"+12VA, +12VB and +12VC SHALL NOT EXCEED 385W"

so 385W/12v = 32A on the 12v rails, even though rail A has 18A, etc.
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
  hide details  
Reply
DELL XPS 8300
(13 items)
 
  
CPUGraphicsRAMHard Drive
intel i7 2600 3.4GHz (TurboBoost 3.8GHz) ATI Radeon HD 5670 8GB 1333MHz 1TB 7200RPM 
OSMonitorPower
Win7 64bit 23" 1920x1080 460W with 385W on 12v rails 
  hide details  
Reply
post #10 of 19
Quote:
Originally Posted by kiurys View Post
Wouldnt that 22A be on a *single* 12v rail and not on all combined?

My psu has 3 rails:

+12VA 18A
+12VB 16A
+12VC 8A

and the following is literally taken from the label of my psu:

"+12VA, +12VB and +12VC SHALL NOT EXCEED 385W"

so 385W/12v = 32A on the 12v rails, even though rail A has 18A, etc.
Nah, you can't sum it.. you got 18A on the stronest rail, meaning 216W. That *should* be enough for the 6850.
The other rails are respectively 192 (*theoretically enough*) and 96 (NOT enough).

If you are sure you're connecting it to the 18A or maybe 16A rail, you should be fine.

PS: Mine is single-rail
My Rig
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Ex-wife's Rig
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CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
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2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
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Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
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My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
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