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PSU extensions up to 3 feet long

post #1 of 4
Thread Starter 
Background: I'm going to mount a computer (mobo/HDD) on the wall above my desk and I would like to mount the PSU under my desk. The computer will just be used for web and video on a second monitor while I game on my sig rig. The best spot for the PSU is about 3 feet from where I want to mount the computer.

Question: I've read a lot about normal 10 and 12 inch extensions working just fine, but will there be any problems with 30-36 inch extensions for the 24-pin, CPU 4-pin, and SATA power? It's an MSI board from an eMachines desktop someone left at my house with a socket 775 Celeron 3.06 Ghz CPU and a 2.5" WD hard drive I have from an old laptop.

Thank you for your help!
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2x Samsung 22" 1680x1050 Corsair AX750 Lian-Li PC-A05 
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Pentium 4 3.0 GHz Asrock P4VM890 1GB DDR-400 MHz Western Digital 160GB - System 
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Desktop
(15 items)
 
Server
(8 items)
 
 
CPUMotherboardGraphicsRAM
Phenom II X4 960T 3.0 GHz MSI K9A2 CF-F Rev 1.0 Asus 7870 4GB Mushkin DDR2-800 MHz 
Hard DriveHard DriveOSMonitor
2x Western Digital 160GB in RAID 0 - System Maxtor 200GB - Data Windows 7 Professional 64-bit Achieva Shimian 27" 2560x1440 
MonitorPowerCase
2x Samsung 22" 1680x1050 Corsair AX750 Lian-Li PC-A05 
CPUMotherboardRAMHard Drive
Pentium 4 3.0 GHz Asrock P4VM890 1GB DDR-400 MHz Western Digital 160GB - System 
Hard DriveHard DriveOSCase
Western Digital 500GB - Backup Western Digital 1TB - Media Windows XP Pro XION Hydraulic 
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post #2 of 4
You'll want to measure the voltage loss as the increased wire size means increased resistance and a greater voltage droop.

It may be alright if the PSU has tight voltage regulation; but considering it's an eMachine's it's most likely not.
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Test Bed
(24 items)
 
TTTbox
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 3570K  Biostar TZ774XE Power Color AX5770 1GB 4x4GB 1866Mhz 9-10-9-27-2T 
Hard DriveHard DriveHard DriveHard Drive
Samsung Spinpoint F3 1TB Samsung Spinpoint F3 1TB Western Digital Green 2TB Samsung Spinpoint M4 500GB 
Hard DriveOptical DriveCoolingOS
Intel X-25M G2 80GB Lite-On BluRay Drive Arctic Cooling Freezer 13 Pro Windows 7 Ultimate 
MonitorKeyboardPowerCase
Dell U2212HM Deck Legend Frost Tactile Silverstone Strider Plus 750w Custom Acrylic Test Bed 
MouseMouse PadAudioAudio
Logitech G500 Cooler Master Storm Tactics FPS Beyer Dynamics DT-990 600ohm Samson MediaOne 3A 
AudioAudioOtherOther
FiiO E09k QOGIR FiiO E17 ALPEN Microsoft Lifecam Studio Blue Yeti Pro Microphone 
CPUMotherboardGraphicsRAM
AMD A10-A5800K ASRock FM2A85X-ITX Radeon HD7770 1GB 2x8GB 1866mhz C9 
Hard DriveHard DriveOptical DriveCooling
SanDisk Ultra Plus 128GB 2TB 5400 RPM  24x DVD Drive Noctua L9A 
OSMonitorKeyboardPower
Windows 7 Home Premium 32" IPS TV Logitech K400 Seasonic G360 
CaseMouseAudio
Cooler Master Elite 120 Advanced Logitech K400 Trackpad Custom 2.1 Home Theater Setup 
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post #3 of 4
Thread Starter 
Thanks! I am going to try to use a Thermaltake (I know it's not the best, but I have it on hand) PSU. The original is already dead.

How much voltage loss is too much?
Desktop
(15 items)
 
Server
(8 items)
 
 
CPUMotherboardGraphicsRAM
Phenom II X4 960T 3.0 GHz MSI K9A2 CF-F Rev 1.0 Asus 7870 4GB Mushkin DDR2-800 MHz 
Hard DriveHard DriveOSMonitor
2x Western Digital 160GB in RAID 0 - System Maxtor 200GB - Data Windows 7 Professional 64-bit Achieva Shimian 27" 2560x1440 
MonitorPowerCase
2x Samsung 22" 1680x1050 Corsair AX750 Lian-Li PC-A05 
CPUMotherboardRAMHard Drive
Pentium 4 3.0 GHz Asrock P4VM890 1GB DDR-400 MHz Western Digital 160GB - System 
Hard DriveHard DriveOSCase
Western Digital 500GB - Backup Western Digital 1TB - Media Windows XP Pro XION Hydraulic 
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Desktop
(15 items)
 
Server
(8 items)
 
 
CPUMotherboardGraphicsRAM
Phenom II X4 960T 3.0 GHz MSI K9A2 CF-F Rev 1.0 Asus 7870 4GB Mushkin DDR2-800 MHz 
Hard DriveHard DriveOSMonitor
2x Western Digital 160GB in RAID 0 - System Maxtor 200GB - Data Windows 7 Professional 64-bit Achieva Shimian 27" 2560x1440 
MonitorPowerCase
2x Samsung 22" 1680x1050 Corsair AX750 Lian-Li PC-A05 
CPUMotherboardRAMHard Drive
Pentium 4 3.0 GHz Asrock P4VM890 1GB DDR-400 MHz Western Digital 160GB - System 
Hard DriveHard DriveOSCase
Western Digital 500GB - Backup Western Digital 1TB - Media Windows XP Pro XION Hydraulic 
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post #4 of 4
That depends on each of the rails. The most important is going to be the +12v rail.
Try to keep it at 11.9v or above. Mine fluctuates between 11.98v and 12.03v.
    
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CPUGraphicsGraphicsRAM
Intel i7 3630QM HD 7970M HD 7970M 2x4GB 1333MHz 
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 256GB mSata Seagate Momentus 750GB Western Digital Scorpio Blue 500GB DVD Burner 
OSMonitorMonitorKeyboard
Windows 7 64-Bit Ultimate 17.3" 1920x1080 Matte Screen Auria 27" 2560x1440 Back-lit Clevo Keyboard 
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330 Watt Power *BRICK*! 
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