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Downgrading PSU when going to a single card, need help

post #1 of 9
Thread Starter 
I recently went from a water cooled 3 card xfire to one single card. I am also dumping my custom water loop (8 radiator fans, pump ect) as it is overkill for just the cpu. Instead I will try the CORSAIR Hydro Series H55. On top of that, I am getting rid of my HDDs for all SSDs. My new system won't draw nearly the power it use to so a 1200W psu is silly. I'd like to know what kind of PSU I can get away with. I do not need much head room.
My system is:
ASUS P8P67 EVO (rev 3)
i5-2500K (oc 4.5ghz)
Mushkin Enhanced Blackline 4GB (2x2gb)
PERC 6/i Raid Card
x8 SSDs (getting on Black Friday so do not know the brand yet)
EVGA 670 FTW
CORSAIR Hydro Series H55
ASUS XONAR Sound Card
x5 120mm Panaflo case fans
x1 140mm Antec case fan

I believe that is it. I have been looking around and cannot seem to find what a PERC 6/i draws at load.
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
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My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
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post #2 of 9
If it's any help at all, the power supply only draws from the wall what the computer requires. It's not pulling a full 1200W all the time. Your power bill will attest to that.
    
CPUMotherboardGraphicsRAM
Q8400 DFI LP DK P45-T2RS eVGA GTX 650 Kingston 
Hard DriveOptical DriveOSMonitor
2.8TB Total LG Super DVD Burner SATA VII Enterprise x64 Gateway FHD2401 
PowerCaseMouseMouse Pad
Corsair VX550W NZXT Source 210 White Logitech G400 Razer Kabuto 
Audio
Creative Audigy 
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CPUMotherboardGraphicsRAM
Q8400 DFI LP DK P45-T2RS eVGA GTX 650 Kingston 
Hard DriveOptical DriveOSMonitor
2.8TB Total LG Super DVD Burner SATA VII Enterprise x64 Gateway FHD2401 
PowerCaseMouseMouse Pad
Corsair VX550W NZXT Source 210 White Logitech G400 Razer Kabuto 
Audio
Creative Audigy 
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post #3 of 9
Thread Starter 
Isn't the PSU running very inefficiently if the actually load is far lower? Power supplies aren't my thing. I was thinking of selling this thing for a more reasonable, efficient unit and putting the extra cash towards my SSD upgrades.
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
  hide details  
Reply
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
  hide details  
Reply
post #4 of 9
Quote:
Originally Posted by grayskunk View Post

Isn't the PSU running very inefficiently if the actually load is far lower?

Depends on the design, but generally yes. But is say 78% efficiency running 100W (128W AC) much different than 87% efficiency running 100W (115W AC)?

You can go down to some good 400-450W PSU if you want though.

Where can you purchase from?
post #5 of 9
Thread Starter 
Quote:
Originally Posted by mikeaj View Post

Depends on the design, but generally yes. But is say 78% efficiency running 100W (128W AC) much different than 87% efficiency running 100W (115W AC)?
You can go down to some good 400-450W PSU if you want though.
Where can you purchase from?
I am in the midwest, USA. There is no Microcenter nor Fry's Electronics in my area. Anywhere online is fair game.
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
  hide details  
Reply
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
  hide details  
Reply
post #6 of 9
What's the real motivation behind wanting to switch? Is the goal to reduce power draw as much as possible, get a power supply that somebody else (or you) thinks makes sense for the system, save the most money possible (including selling the old one), or what? I'm not sure if I can peer into the mind of someone who wants to get 8x SSDs without some assistance... thinking.gif

Since now I'm confused, I'm just going to suggest Rosewill Capstone in the meantime. Can't go (too) wrong there. $60 for high-end quality and 80 plus gold? Sure.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182066
post #7 of 9
Thread Starter 
Quote:
Originally Posted by mikeaj View Post

What's the real motivation behind wanting to switch? Is the goal to reduce power draw as much as possible, get a power supply that somebody else (or you) thinks makes sense for the system, save the most money possible (including selling the old one), or what?
That is reasonable to ask. Having x8 WD on raid5 is great, but I get drive failures about once every year or so causing me to RMA. This is a pain so I figured I'd just sell them all and get x8 cheap ssd's to increase speed and lower failures. On top of that, I've had a custom loop for several years and it is also becoming a bit of a pain, (especially when upgrading) so I am riding myself of that.
All those changes lowered my power needs a bunch (to what exactly, I had no idea). Since I was selling off a bunch of hardware, I wanted to add my now unnecessary PSU to the list. I was wondering how low I could actually go as I expect to add nothing more to the rig.
It is basically to save cost. The HDDs I have are selling for more used then I bought them new. The PSU I got for $55 shipped when Mushkin got out of the market and figured I could get something lower power + cash. If it is a fruitless exercise, I got no problem keeping it.
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
  hide details  
Reply
My Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500k Asus P8P67 EVO GTX 670 FTW 16GB Mushkin 
Hard DriveCoolingOSMonitor
x8 640GB WD Black on PERC 6/i / x3 intel SSD 520 Water Gentoo Linux x64 x3 HP w2207h 
KeyboardPowerCaseMouse
Logitech G19 Mushkin 1200W Silverstone FT01 Logitec G500 
Mouse PadAudio
Steelseries QTK SteelSeries Siberia v2 USB / 5.1 Logitech Surround 
  hide details  
Reply
post #8 of 9
It's not worth it to buy another PSU to save a small amount of $$ IMO. It's quite contradictory.
post #9 of 9
should just run it with the PSU you have now, sure the efficiency may suffer a little but the money you put into a new PSU could go towards something more important that may or may not be computer build related... redface.gif
JunkoXan's Build
(15 items)
 
   
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Intel 2700k (Engineering Sample) Asus P67 Sabertooth Sapphire Dual-X 280x G.Skill Sniper (2x4gb) 
Hard DriveCoolingOSMonitor
Samsung F3 Spinpoint Cooler Masters 616+ Windows 7 Upstar 20" 1080p TV 
MonitorKeyboardPowerCase
Dell Monitor 21" 1680x1050 Dell Keyboard Antec High Current Gamer 900W Cooler Master HAF-XB 
MouseMouse Pad
E-3lue Mazer II 2600DPI Optical Mouse Custom Made 
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JunkoXan's Build
(15 items)
 
   
CPUMotherboardGraphicsRAM
Intel 2700k (Engineering Sample) Asus P67 Sabertooth Sapphire Dual-X 280x G.Skill Sniper (2x4gb) 
Hard DriveCoolingOSMonitor
Samsung F3 Spinpoint Cooler Masters 616+ Windows 7 Upstar 20" 1080p TV 
MonitorKeyboardPowerCase
Dell Monitor 21" 1680x1050 Dell Keyboard Antec High Current Gamer 900W Cooler Master HAF-XB 
MouseMouse Pad
E-3lue Mazer II 2600DPI Optical Mouse Custom Made 
  hide details  
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