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Will my 750W PSU be able to power all of this...

post #1 of 9
Thread Starter 
Hi all,

Here is my current setup:

GA-P55A-UD4P F14
Intel Core i5-760 CPU
2x XFX ATI 5870 GPU in Crossfire
Corsair 16GB RAM
2X Samsung F3 HD103SJ 1TB Hard Drives (1 for Linux and 1 for Windows 7 64-bit)
Sony DVD-RW AD-7260S-0B
Corsair 750HX PSU
Noctua NH-D14 CPU Cooler
Corsair Graphite 600T Case

I am wanting to add 2 SSD drives, and another 2 Samsung F3 HD103SJ 1TB hard drives. Which will give me a total of 6 hard drives, 2 SSDs and 4 mechanical!

Before I plug the trigger, I want to make sure that my PSU can handle all of this. I really don't want to upgrade to an 850W PSU.

Newegg's PSU calculator said that all of this will be about 786W, while eXtreme PSU calculator said only 544W.
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i5-760 GA-P55A-UD4P ATI 5870 ATI 5870 
RAMHard DriveHard DriveOptical Drive
Corsair 16GB Samsung 1TB Samsung 1TB Sony DVD-RW 
CoolingOSMonitorPower
NH-D14 Windows 7 64-bit Dell UltraSharp U2311H 23" Corsair 750W 
Case
Corsair 600T 
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My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i5-760 GA-P55A-UD4P ATI 5870 ATI 5870 
RAMHard DriveHard DriveOptical Drive
Corsair 16GB Samsung 1TB Samsung 1TB Sony DVD-RW 
CoolingOSMonitorPower
NH-D14 Windows 7 64-bit Dell UltraSharp U2311H 23" Corsair 750W 
Case
Corsair 600T 
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post #2 of 9
Tick the options on the calculator so that it adds 100% system load use. 100% CPU TDP and everything like if you were running P95 and 3Dmarks at the same time.
Add about 100 watts to that total and that should be a good PSU.

Note that the PSU is one of the few components (like cases) where you're likely to migrate it unto a new system. So overspending on the PSU is never a bad idea. Of course, however, not saying that would would need a 1000 watt beast; just something higher than what the calculators say.

Calculators say the 100% peak usage of my system is 515 watts, so I bought a 700 watt.


ADD: Don't follow the Newegg calculator.
Edited by Wnivre - 8/25/12 at 2:52pm
Lilith VIII
(13 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i5 2500K Maximus IV GENE-Z WindForce 7950 @ 1.2GHz EVGA GTX 470 *Hybrid PhysX* 
RAMHard DriveCoolingOS
16GB, 1600MHz Ripjaws X (4x4GB) 1TB + 1TB + 250GB + 160GB + 160GB CM Hyper 212 Plus Windows 8 Professional 
MonitorKeyboardPowerCase
23' + 21.5' Logitech Classic Keyboard 200 OCZ 700w ModXStream Pro CM Storm Trooper 
Mouse
Microsoft Wireless Mouse 3000 
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Lilith VIII
(13 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i5 2500K Maximus IV GENE-Z WindForce 7950 @ 1.2GHz EVGA GTX 470 *Hybrid PhysX* 
RAMHard DriveCoolingOS
16GB, 1600MHz Ripjaws X (4x4GB) 1TB + 1TB + 250GB + 160GB + 160GB CM Hyper 212 Plus Windows 8 Professional 
MonitorKeyboardPowerCase
23' + 21.5' Logitech Classic Keyboard 200 OCZ 700w ModXStream Pro CM Storm Trooper 
Mouse
Microsoft Wireless Mouse 3000 
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post #3 of 9
Well, just by looking at your list of hardware, I'd say that you'll be perfectly fine with a 750W PSU.
 
Study Laptop
(9 items)
 
 
CPUGraphicsRAMHard Drive
Intel Core i5 (4. Gen) 4210U / 1.7 GHz NVIDIA GeForce 840M - 2 GB DDR3 SDRAM 1600Mhz 8GB SSHD 1TB 
Optical DriveCoolingOSMonitor
Yes great 10mm coolers everywhere at max speed Windows 8 15,6" 
Keyboard
The Lenovo one 
CPUMotherboardGraphicsRAM
[Intel] i5 2500k 4.5Ghz @ 1.35V [ASUS] Z77 TUF [Gainward] GTX 670 [Corsair] Vengeance 2x4GB 
Hard DriveHard DriveCoolingCooling
[Samsung] 830 SSD 128GB [Seagate] Barracuda® 1TB [XSPC] Raystorm CPU Block Aerocool 200mm White Case Fan 
CoolingCoolingCoolingCooling
[EK] 1/4" Fittings [EK] DDC X-Res CSQ Top/Res combo [Laing] DDC-3 10W Pump [XSPC] Razor Block + Backplate 
CoolingCoolingCoolingCooling
[XSPC] 1/4" White Tubing [HW Labs] GTS 360 Lite Rad [Corsair] 3x SP120 Quiet Edition Rad Fans [Corsair] 1x AF120 Quiet Edition Case Fan 
OSMonitorKeyboardPower
[Windows] 8 64-bit [Philips] 27E LSB [Corsair] Vengeance K90 [OCZ] 600W 
CaseMouseMouse PadAudio
[Corsair] 600t SE [Corsair] M90 [Cooler Master] Storm XL Mousepad [Beyerdynamic] DT990 Pro 250Ohm 
AudioOther
[Fiio] E7 [Phobya] Touch 6 Fan Controller 
  hide details  
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Study Laptop
(9 items)
 
 
CPUGraphicsRAMHard Drive
Intel Core i5 (4. Gen) 4210U / 1.7 GHz NVIDIA GeForce 840M - 2 GB DDR3 SDRAM 1600Mhz 8GB SSHD 1TB 
Optical DriveCoolingOSMonitor
Yes great 10mm coolers everywhere at max speed Windows 8 15,6" 
Keyboard
The Lenovo one 
CPUMotherboardGraphicsRAM
[Intel] i5 2500k 4.5Ghz @ 1.35V [ASUS] Z77 TUF [Gainward] GTX 670 [Corsair] Vengeance 2x4GB 
Hard DriveHard DriveCoolingCooling
[Samsung] 830 SSD 128GB [Seagate] Barracuda® 1TB [XSPC] Raystorm CPU Block Aerocool 200mm White Case Fan 
CoolingCoolingCoolingCooling
[EK] 1/4" Fittings [EK] DDC X-Res CSQ Top/Res combo [Laing] DDC-3 10W Pump [XSPC] Razor Block + Backplate 
CoolingCoolingCoolingCooling
[XSPC] 1/4" White Tubing [HW Labs] GTS 360 Lite Rad [Corsair] 3x SP120 Quiet Edition Rad Fans [Corsair] 1x AF120 Quiet Edition Case Fan 
OSMonitorKeyboardPower
[Windows] 8 64-bit [Philips] 27E LSB [Corsair] Vengeance K90 [OCZ] 600W 
CaseMouseMouse PadAudio
[Corsair] 600t SE [Corsair] M90 [Cooler Master] Storm XL Mousepad [Beyerdynamic] DT990 Pro 250Ohm 
AudioOther
[Fiio] E7 [Phobya] Touch 6 Fan Controller 
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post #4 of 9
Yes you'll be fine.

Even if your computer's max power draw and your PSU rated power were the same (say they were both 750), do you really expect to be running every component in your PC to 100% for any length of time? Every last drive going 100%, the CPU at 100% load, the GPU at 100% load, the memory controller and all 16GB at 100% load, and the DVD drive at 100% load? I would like to know what you are doing that would do that biggrin.gif And last, good PSUs are under-rated.
    
CPUMotherboardGraphicsRAM
i5 2500K MSI P67A-G43 MSI GTX 460 Cyclone Ripjaws X 
Hard DriveHard DriveOptical DriveOS
Vertex 2 WD Green ASUS Windows 7 
PowerCase
Antec TruePower New 750 HAF 922 
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CPUMotherboardGraphicsRAM
i5 2500K MSI P67A-G43 MSI GTX 460 Cyclone Ripjaws X 
Hard DriveHard DriveOptical DriveOS
Vertex 2 WD Green ASUS Windows 7 
PowerCase
Antec TruePower New 750 HAF 922 
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post #5 of 9
You're in the clear. thumb.gif
post #6 of 9
Quote:
Originally Posted by mad0314 View Post

Yes you'll be fine.
Even if your computer's max power draw and your PSU rated power were the same (say they were both 750), do you really expect to be running every component in your PC to 100% for any length of time? Every last drive going 100%, the CPU at 100% load, the GPU at 100% load, the memory controller and all 16GB at 100% load, and the DVD drive at 100% load? I would like to know what you are doing that would do that biggrin.gif And last, good PSUs are under-rated.

Doesn't really matter. It's a good idea to have some headroom on the PSU, in order for it to not stress too much because of the lifestan and noise coming from the PSU. Another thing is that a larger PSU lasts longer when you want to upgrade the other parts of your computer.

But still, a 750W is more than OP needs, so it won't stress at all.
 
Study Laptop
(9 items)
 
 
CPUGraphicsRAMHard Drive
Intel Core i5 (4. Gen) 4210U / 1.7 GHz NVIDIA GeForce 840M - 2 GB DDR3 SDRAM 1600Mhz 8GB SSHD 1TB 
Optical DriveCoolingOSMonitor
Yes great 10mm coolers everywhere at max speed Windows 8 15,6" 
Keyboard
The Lenovo one 
CPUMotherboardGraphicsRAM
[Intel] i5 2500k 4.5Ghz @ 1.35V [ASUS] Z77 TUF [Gainward] GTX 670 [Corsair] Vengeance 2x4GB 
Hard DriveHard DriveCoolingCooling
[Samsung] 830 SSD 128GB [Seagate] Barracuda® 1TB [XSPC] Raystorm CPU Block Aerocool 200mm White Case Fan 
CoolingCoolingCoolingCooling
[EK] 1/4" Fittings [EK] DDC X-Res CSQ Top/Res combo [Laing] DDC-3 10W Pump [XSPC] Razor Block + Backplate 
CoolingCoolingCoolingCooling
[XSPC] 1/4" White Tubing [HW Labs] GTS 360 Lite Rad [Corsair] 3x SP120 Quiet Edition Rad Fans [Corsair] 1x AF120 Quiet Edition Case Fan 
OSMonitorKeyboardPower
[Windows] 8 64-bit [Philips] 27E LSB [Corsair] Vengeance K90 [OCZ] 600W 
CaseMouseMouse PadAudio
[Corsair] 600t SE [Corsair] M90 [Cooler Master] Storm XL Mousepad [Beyerdynamic] DT990 Pro 250Ohm 
AudioOther
[Fiio] E7 [Phobya] Touch 6 Fan Controller 
  hide details  
Reply
 
Study Laptop
(9 items)
 
 
CPUGraphicsRAMHard Drive
Intel Core i5 (4. Gen) 4210U / 1.7 GHz NVIDIA GeForce 840M - 2 GB DDR3 SDRAM 1600Mhz 8GB SSHD 1TB 
Optical DriveCoolingOSMonitor
Yes great 10mm coolers everywhere at max speed Windows 8 15,6" 
Keyboard
The Lenovo one 
CPUMotherboardGraphicsRAM
[Intel] i5 2500k 4.5Ghz @ 1.35V [ASUS] Z77 TUF [Gainward] GTX 670 [Corsair] Vengeance 2x4GB 
Hard DriveHard DriveCoolingCooling
[Samsung] 830 SSD 128GB [Seagate] Barracuda® 1TB [XSPC] Raystorm CPU Block Aerocool 200mm White Case Fan 
CoolingCoolingCoolingCooling
[EK] 1/4" Fittings [EK] DDC X-Res CSQ Top/Res combo [Laing] DDC-3 10W Pump [XSPC] Razor Block + Backplate 
CoolingCoolingCoolingCooling
[XSPC] 1/4" White Tubing [HW Labs] GTS 360 Lite Rad [Corsair] 3x SP120 Quiet Edition Rad Fans [Corsair] 1x AF120 Quiet Edition Case Fan 
OSMonitorKeyboardPower
[Windows] 8 64-bit [Philips] 27E LSB [Corsair] Vengeance K90 [OCZ] 600W 
CaseMouseMouse PadAudio
[Corsair] 600t SE [Corsair] M90 [Cooler Master] Storm XL Mousepad [Beyerdynamic] DT990 Pro 250Ohm 
AudioOther
[Fiio] E7 [Phobya] Touch 6 Fan Controller 
  hide details  
Reply
post #7 of 9
Thread Starter 
Major thanks guys! I am pulling the trigger! SSD here I come! biggrin.gif

I am not going to be running every component at 100% at the same time. I do some video encoding, but mostly gaming.
Edited by Doctor Who - 8/25/12 at 4:42pm
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i5-760 GA-P55A-UD4P ATI 5870 ATI 5870 
RAMHard DriveHard DriveOptical Drive
Corsair 16GB Samsung 1TB Samsung 1TB Sony DVD-RW 
CoolingOSMonitorPower
NH-D14 Windows 7 64-bit Dell UltraSharp U2311H 23" Corsair 750W 
Case
Corsair 600T 
  hide details  
Reply
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i5-760 GA-P55A-UD4P ATI 5870 ATI 5870 
RAMHard DriveHard DriveOptical Drive
Corsair 16GB Samsung 1TB Samsung 1TB Sony DVD-RW 
CoolingOSMonitorPower
NH-D14 Windows 7 64-bit Dell UltraSharp U2311H 23" Corsair 750W 
Case
Corsair 600T 
  hide details  
Reply
post #8 of 9
It's more than you need, but as said spending a little extra, much like a chassis is never bad. smile.gif

But yeah 750w will power that and a little more.
post #9 of 9
Just for reference, I had a 700W 'Fatal1ty' PSU powering my Crossfire'd 5870s + OC'd 2600K. Ran them no worries, day in, day out; air out of the back of the PSU never even warmed up tongue.gif
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