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another power supply noob question

post #1 of 9
Thread Starter 
I'm building new computer soon so I'm wondering should I get 650 watt or 750 watt power supplies?

I'm pretty sure I would fine with 650 watt psu but in case If I upgrade in future if gpu require higher psu watt.

I would like go with 750 watt psu but since I don't have much knowledge about power supplies, if I buy 750watt power supply for pc does it consume more eletricity then 650 watt power supply?
post #2 of 9
what is it powering
Old Reliable
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CPUMotherboardGraphicsRAM
955BE C3 @ 3.82 GHz [1.404v Load] ASUS M4A88T-V EVO/USB3 [2.8 GHz NB @ 1.318v] ASUS ROG STRIX RX 470 2x4GB G.SKILL Ripjaws [1600 8-8-8-24 @ 1.5v] 
Hard DriveOptical DriveCoolingOS
320GB WD Caviar Blue Sony Optiarc DVD RW AD-7260S ATA XSPC Rasa 750 RS240 [Backplate Mod] [MX-2] Windows 7 Ultimate 64-Bit 
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Acer H236HLbid  Logitech K120 OCZ ModXStream Pro 600W Modular NZXT M59 [5 x 120mm Fans + Rheobus Fan Controller] 
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Old Reliable
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CPUMotherboardGraphicsRAM
955BE C3 @ 3.82 GHz [1.404v Load] ASUS M4A88T-V EVO/USB3 [2.8 GHz NB @ 1.318v] ASUS ROG STRIX RX 470 2x4GB G.SKILL Ripjaws [1600 8-8-8-24 @ 1.5v] 
Hard DriveOptical DriveCoolingOS
320GB WD Caviar Blue Sony Optiarc DVD RW AD-7260S ATA XSPC Rasa 750 RS240 [Backplate Mod] [MX-2] Windows 7 Ultimate 64-Bit 
MonitorKeyboardPowerCase
Acer H236HLbid  Logitech K120 OCZ ModXStream Pro 600W Modular NZXT M59 [5 x 120mm Fans + Rheobus Fan Controller] 
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Logitech MX518 ASUS Xonar DG + Logitech Z523 Turtle Beach Ear Force X11s 
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post #3 of 9
Is your sig machine what it will be powering 2500K and a 6850?
Unlawful
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Samsung 830 Seagate Barracude 7200.12 Samsung F3 1TB Windows 7 Home x64 
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Unlawful
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Hard DriveHard DriveHard DriveOS
Samsung 830 Seagate Barracude 7200.12 Samsung F3 1TB Windows 7 Home x64 
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Seasonic M12-II 430W Modular Cooler Master Elite 332 
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post #4 of 9
Thread Starter 
i7 2600k cpu
8gig ram
blue ray drive
2 tera gb hard drive
80sd drive
2x6950 1gb model
Haven't decide on the mother board yet.

650 watt should be able to handle all this but my main question if do get 750 watt psu is my electric bill is going to be higher for using 750 watt then 650 watt psu?
Edited by sadness10 - 4/16/11 at 8:53pm
post #5 of 9
Thread Starter 
Quote:
Originally Posted by TheLaw View Post
Is your sig machine what it will be powering 2500K and a 6850?
i could use my sig psu but it's 4 year old and I have to unscrew everything back off my case to take out the psu, to much work to do so I'm not going use this psu, I'm going order new psu instead.
post #6 of 9
Your bill will be roughly the same with either the 650w or 750w, assuming both are of identical efficiency.
I'd recommend buying the best quality you can afford, a Seasonic X-650 or Corsair AX650 would be pretty close to perfect for that setup.

There is no harm in getting a higher rated unit than you need, in any other way than the initial cost, unless you go for insanely huge levels of overkill.
Ryzen 5 1600
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256GB Samsung PM961 Polaris M.2 NVMe  1TB Toshiba DT01ACA100 3.5" HDD, SATA III  Cooler Master Hyper 212 Evo Windows 10 64 
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Unicomp Model M 650W EVGA SuperNOVA G1, 80PLUS Gold, Full Modular Kolink Luminosity Cooler Master Reaper Aluminium 
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Ryzen 5 1600
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256GB Samsung PM961 Polaris M.2 NVMe  1TB Toshiba DT01ACA100 3.5" HDD, SATA III  Cooler Master Hyper 212 Evo Windows 10 64 
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Unicomp Model M 650W EVGA SuperNOVA G1, 80PLUS Gold, Full Modular Kolink Luminosity Cooler Master Reaper Aluminium 
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by allikat View Post
Your bill will be roughly the same with either the 650w or 750w, assuming both are of identical efficiency.
I'd recommend buying the best quality you can afford, a Seasonic X-650 or Corsair AX650 would be pretty close to perfect for that setup.

There is no harm in getting a higher rated unit than you need, in any other way than the initial cost, unless you go for insanely huge levels of overkill.
alright thanks for the info, that was answer I was looking for . REp+
post #8 of 9
Try 700W. Xigmatek 702 is a good cheap choice IMO. About $75. Decent quality.
Unlawful
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CPUMotherboardGraphicsRAM
AMD Athlon II X4 620 ASUS M4A785G-M EVO XFX ATI HD4650 4GB G.Skill Ripjaws DDR3 1333 
Hard DriveHard DriveHard DriveOS
Samsung 830 Seagate Barracude 7200.12 Samsung F3 1TB Windows 7 Home x64 
PowerCase
Seasonic M12-II 430W Modular Cooler Master Elite 332 
  hide details  
Reply
Unlawful
(15 items)
 
  
CPUMotherboardGraphicsRAM
AMD Athlon II X4 620 ASUS M4A785G-M EVO XFX ATI HD4650 4GB G.Skill Ripjaws DDR3 1333 
Hard DriveHard DriveHard DriveOS
Samsung 830 Seagate Barracude 7200.12 Samsung F3 1TB Windows 7 Home x64 
PowerCase
Seasonic M12-II 430W Modular Cooler Master Elite 332 
  hide details  
Reply
post #9 of 9
Quote:
Originally Posted by sadness10 View Post
i7 2600k cpu
8gig ram
blue ray drive
2 tera gb hard drive
80sd drive
2x6950 1gb model
Haven't decide on the mother board yet.

650 watt should be able to handle all this but my main question if do get 750 watt psu is my electric bill is going to be higher for using 750 watt then 650 watt psu?
Coolermaster Gold 700W.
X79-GCN
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Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
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Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
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Logitech G400s Senn HD 598 
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X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
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