Overclock.net › Forums › Components › Power Supplies › How much load is safe for one power cable?
New Posts  All Forums:Forum Nav:

How much load is safe for one power cable?

post #1 of 7
Thread Starter 
So i have the seasonic X850, and I'm trying to figure out how to run power to my peripherals.

I need power to a DVD burner, a 1tb 7200rpm hdd, 3x scythe s-flex 1900rpm, an ssd, and an MCP355 pump.

My idea for the cleanest run would be a single power cable with the molex plugs, with sata adapters coming off for the sata drives. Would that be feasible? It seems like alot of load to be putting on one power cable, especially since the most molex or sata connectors it has is 3 per cable, and I'm not really sure about that.

So I guess my question is, how many devices can I run on one cable?
Gaming Machine
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K ASUS P8P67 Deluxe 2x Asus GTX 470 G. Skill Rip Jaws DDR3 1600mhz 2x2gb 
Hard DriveOSMonitorKeyboard
Crucial RealSSD 64gb Windows 7 Ultimate x64 3x I-Inc 25" Microsoft X6 Sidewinder 
PowerCaseMouse
Seasonic X850 Silverstone Raven RV02 Logitech G9X 
  hide details  
Reply
Gaming Machine
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K ASUS P8P67 Deluxe 2x Asus GTX 470 G. Skill Rip Jaws DDR3 1600mhz 2x2gb 
Hard DriveOSMonitorKeyboard
Crucial RealSSD 64gb Windows 7 Ultimate x64 3x I-Inc 25" Microsoft X6 Sidewinder 
PowerCaseMouse
Seasonic X850 Silverstone Raven RV02 Logitech G9X 
  hide details  
Reply
post #2 of 7
It wouldn't catch on fire or anything, but you'd experience some significant voltage drop with a load like that.

It would be better to power all the drives off one cable and the fans and pump off the other.
post #3 of 7
also, need to see how many rails your psu has. if more then one make sure the cable your connecting to has enough amps for all your stuff
Current Rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k ASRock Extreme3 Gen3 xfx 290x Cryovenom Corsair Vengeance 
Hard DriveCoolingOSMonitor
Intel SSD CPU and GPU in common loop Windows 7 x64 Dell Ultrasharp 24" 
PowerCaseMouseMouse Pad
PC Power and Cooling 610W Coolermaster 690 II Advanced DeathAdder Old Class Notebook 
Audio
X-Fi Titanium 
  hide details  
Reply
Current Rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k ASRock Extreme3 Gen3 xfx 290x Cryovenom Corsair Vengeance 
Hard DriveCoolingOSMonitor
Intel SSD CPU and GPU in common loop Windows 7 x64 Dell Ultrasharp 24" 
PowerCaseMouseMouse Pad
PC Power and Cooling 610W Coolermaster 690 II Advanced DeathAdder Old Class Notebook 
Audio
X-Fi Titanium 
  hide details  
Reply
post #4 of 7
Quote:
Originally Posted by qbical View Post
also, need to see how many rails your psu has. if more then one make sure the cable your connecting to has enough amps for all your stuff
It will be fine regardless. He won't be drawing nearly enough current to trip the OCP.
post #5 of 7
Thread Starter 
I usually do put the drives on a seperate lines from the cd drives/fans, just because when I was first building pcs there was alot of talk about fans and stuff "dirtying" the voltage, instead of a nice clean stable voltage going to hdds.

I believe the x850 is single rail.

So there's no technical reason why I couldn't run everything off one line then, right? I won't br pulling enough amps through the wires to melt them?
Gaming Machine
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K ASUS P8P67 Deluxe 2x Asus GTX 470 G. Skill Rip Jaws DDR3 1600mhz 2x2gb 
Hard DriveOSMonitorKeyboard
Crucial RealSSD 64gb Windows 7 Ultimate x64 3x I-Inc 25" Microsoft X6 Sidewinder 
PowerCaseMouse
Seasonic X850 Silverstone Raven RV02 Logitech G9X 
  hide details  
Reply
Gaming Machine
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K ASUS P8P67 Deluxe 2x Asus GTX 470 G. Skill Rip Jaws DDR3 1600mhz 2x2gb 
Hard DriveOSMonitorKeyboard
Crucial RealSSD 64gb Windows 7 Ultimate x64 3x I-Inc 25" Microsoft X6 Sidewinder 
PowerCaseMouse
Seasonic X850 Silverstone Raven RV02 Logitech G9X 
  hide details  
Reply
post #6 of 7
You won't be melting anything, but with that much load the additional current will heat up the wires enough that by the end of the cable you'll see significant voltage drop. Not out of spec or anything, but enough so that I'd put the more important stuff on the connectors closer to the PSU.
post #7 of 7
4-5 amps per wire. So assuming these are all most 12v devices, 50-60 watts worth.

I would keep the hard drives off that one wire, it's the most sensitive device, with potentially the most value.
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Power Supplies
Overclock.net › Forums › Components › Power Supplies › How much load is safe for one power cable?