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power adapter suffcient ?

post #1 of 6
Thread Starter 
Hey guys,

I am curious if my power adapter is capable of supporting two 2.5 sata HDD.

The power adapter specs:

+5vdc/2a
+12vdc/2a
36w


I am just not sure about the startup current. Do you think it can power up two harddrives?
post #2 of 6
Hard drives should only draw ~10-15 watts max when starting up. Laptop drives are usually under half that.

And that said... I've heard much of that is drawn off the +5V rails? Might be old info, but you've got 10w to play with on the +5V, and 24w on the +12v.

What brand of laptop drives? WD drives tend to be more power hungry, while a 5400RPM Seagate or Samsung is a lot less power hungry.

I'd probably try it and see if it worked.
     
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Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
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CPUMotherboardGraphicsRAM
FX-8350 @ 4.6ghz 1.425v Sabertooth 990FX Zotac GTX 1070 Amp! 32GB (4x8GB) Kingston Fury 1866mhz CL10 1T 1.5v 
Hard DriveHard DriveHard DriveHard Drive
Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
Hard DriveHard DriveHard DriveHard Drive
Seagate 2TB - ST2000DM001 WD 640GB Black - WD6401AALS Seagate 6TB - ST6000DM001 Micron M500 - MTFDDAK480MAV 
Optical DriveOptical DriveOptical DriveOptical Drive
Pioneer DVR-115DBK Samsung SH-S243D/BEBE LG GH22NS90 Lite-On EBAU108 External DVD 
CoolingCoolingCoolingOS
Noctua NH-D15 Fractal Design 140mm Fan - FD-FAN-140 Fractal Design 120mm Fan - FD-FAN-120 Windows 7 
OSMonitorMonitorKeyboard
Ubuntu 14.04 LTS Samsung 2343BWX 23" (2048x1152) BenQ GW2765HT 27" IPS LCD Monitor (2560x1440) Genius Keyboard KB-G235 PA 
PowerCaseMouseMouse Pad
Seasonic Platinum 1000w PSU - SS-1000XP Fractal Design Define R5 Steelseries Rival 6500 dcpi Mousepad + Desk 
AudioAudioOtherOther
Onboard Realtek® ALC 892 Cyber Acoustics CA-2992 2.0 Speakers Razer Krait 1600 DPI nGear G-C1601 Card Reader 
OtherOther
Pisen Card Reader Gigabyte M7 Thor 
CPUMotherboardGraphicsRAM
VIA Eden C7 1200mhz Jetway J7F4K1G2ES-LF VIA Onboard 512MB PC2-4200 
Hard DriveOptical DriveCoolingOS
A-Data FlashDrive None Fanless Linux 
MonitorKeyboardPowerCase
Headless None 65w Power Brick Antec ISK300-65 
MouseAudio
None Onboard VIA 
CPUMotherboardGraphicsRAM
Barton XP-M 2400+ FJQ4C Asus A7N8X-E Deluxe 256MB BFG 7800GS OC 2x512MB Samsung PC3200 
Hard DriveOSMonitorKeyboard
Raptor 74GB/Seagate 120GB Windows 2000 Pro 60hz 17" CRT Brandless PS2 Keyboard 
PowerMouse
Antec Neo HE 550w Logitech G5 
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post #3 of 6
Thread Starter 
Thanks,


Yup both laptop HDDs. Just finished building a molex > 2 satas

WD Scorpio Black 160GB
post #4 of 6
I don't think (but haven't checked) that a laptop drive pulls more than ~1A on the 5V rail during startup. So you should be fine. (this is why a laptop drive can work using power from 2 USB ports - which supply 500mA each)

The only problem you may have is if your cheapy power supply requires some 12V load in order to properly regulate the 5V lines. As you aren't loading the 12V rail at all you may have overvoltage problems on the 5V rail which could damage your drives. Check to ensure that the 5V rail actually does supply 5V...
post #5 of 6
OP: Saw this link, Roundup: 2.5-inch Hard Disk Drives with 500 GB, 640 GB and 750 GB Storage Capacities, thought it could help you out. Cheers!
   
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Seagate Barracuda 3TB 7200RPM SATA3 64MB LG Super Multi Blu-ray Disc and HD DVD-ROM Drive LG GH24NS90B 24X SATA Internal Super Multi DVD ... CPU Cooler [Summer-Time] = Watercool HEATKILLER... 
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Intel Core i7 3930k RAMPAGE IV EXTREME ASUS GTX 590 Samsung 30nm 4 x 4GB sticks 
Hard DriveHard DriveHard DriveOptical Drive
SAMSUNG 850 EVO 250GB 1TB WD Green 300GB WD Velociraptor (4 in RAID 0) LG GH24NS90B 24X SATA Internal Super Multi DVD ... 
Optical DriveCoolingOSMonitor
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Hard DriveHard DriveOptical DriveCooling
120GB Samsung 840 Western Digital Red 3TB SATA3 64MB Cache 3.5in ... LG Super Multi Blu-ray Disc and HD DVD-ROM Drive Cooler Master GeminII M4 - CPU Cooler 
CoolingOSMonitorKeyboard
Noctua NF-R8 80mm Fans Win7 SP1 64bit Visio 50" Plasma Logitech Mini Controller for Logitech Revue and... 
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COOTER [HTPC]
(14 items)
 
CPUMotherboardGraphicsGraphics
Intel Core i7 5960X ASUS RAMPAGE V EXTREME/U3.1 MSI R9 290X LIGHTNING MSI R9 290X LIGHTNING 
GraphicsRAMHard DriveHard Drive
MSI R9 290X LIGHTNING Kingston HyperX Predator 16GB (4 x 4GB) DDR4 2666 Intel 400GB 750 Series NVMe PCIe (OS drive) Samsung 840 Pro Series 256GB (2 in RAID 0) 
Hard DriveOptical DriveOptical DriveCooling
Seagate Barracuda 3TB 7200RPM SATA3 64MB LG Super Multi Blu-ray Disc and HD DVD-ROM Drive LG GH24NS90B 24X SATA Internal Super Multi DVD ... CPU Cooler [Summer-Time] = Watercool HEATKILLER... 
CoolingCoolingCoolingCooling
CPU Cooler [Winter-Time] = Custom 300W ss phase... Hardware Labs Black Ice GTX 480 Radiator (4 x 1... Feser X-Changer Triple (3 x 120mm) Swiftech MCP655 (x2) 
CoolingCoolingCoolingCooling
Koolance RP-452X2 Dual 5.25" Reservoir EK MSI R9 290X Lightning - Full Cover VGA Water... EK MSI R9 290X Lightning - Full Cover VGA Water... EK MSI R9 290X Lightning - Full Cover VGA Water... 
OSMonitorKeyboardPower
Windows 10 Pro x64 (3) ASUS VG248QE 24-Inch Screen LED-lit Monitor Ducky Mini PC Power & Cooling Turbo-Cool 1200 
CaseMouseMouse PadAudio
Xigmatek Elysium [Black w/ Window] Razer Naga Hex MOBA Perixx DX-2000XXL Boston Acoustics MicroMediaSpeaker System 
AudioOther
Sennheiser PC 363D EVGA Supernova 1300G2 - 1300W PSU (second PSU) 
CPUMotherboardGraphicsRAM
Intel Core i7 3930k RAMPAGE IV EXTREME ASUS GTX 590 Samsung 30nm 4 x 4GB sticks 
Hard DriveHard DriveHard DriveOptical Drive
SAMSUNG 850 EVO 250GB 1TB WD Green 300GB WD Velociraptor (4 in RAID 0) LG GH24NS90B 24X SATA Internal Super Multi DVD ... 
Optical DriveCoolingOSMonitor
LG GH24NS90B 24X SATA Internal Super Multi DVD ... Corsair H110i GT Windows 10 Pro x64 LG 24" Flatron 
KeyboardPowerCaseMouse
Ducky Shine II - w/ Brown Cherry MX w/ English ... Corsair TX650 Nanoxia Deep Silence 2 RAZER DeathAdder 
Mouse PadAudioAudio
X Trac Ripper HT| OMEGA eCLARO  TRITTON AX Pro Dolby Digital 5.1 True Surround ... 
CPUMotherboardGraphicsRAM
AMD A6-3650 ASUS F1A75-M-PRO R2.0 EVGA GeForce GTX 960 4GB Superclocked Samsung 30nm 2 x 4GB sticks 
Hard DriveHard DriveOptical DriveCooling
120GB Samsung 840 Western Digital Red 3TB SATA3 64MB Cache 3.5in ... LG Super Multi Blu-ray Disc and HD DVD-ROM Drive Cooler Master GeminII M4 - CPU Cooler 
CoolingOSMonitorKeyboard
Noctua NF-R8 80mm Fans Win7 SP1 64bit Visio 50" Plasma Logitech Mini Controller for Logitech Revue and... 
PowerCase
PC Power & Cooling Silencer Mk III 400W ATX Mod... Silverstone Sugo 
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post #6 of 6
Thread Starter 
Thanks guys.
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