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PSU wattage?

post #1 of 15
Thread Starter 
Going to be building a mini-ITX gaming rig but I'm unaware of how many watts my PSU will need. Here are the parts I'm planning on getting:
i7-3770K
ASUS P8Z77-I DELUXE
16GB G.SKILL 2133Mhz DDR3 (2x8GB)
Western Digital WD Black 1.5TB 64MB Cache SATA 6.0Gb/s
EVGA 02G-P4-2670-KR GeForce GTX 670 2GB 256-bit GDDR5
+
All standard Peripherals (excluding speakers)

Finally, would you guys be so kind as to find me the smallest case possible that is still compatible with everything?

Thanks a ton smile.gif
post #2 of 15
A solid 450W will power that system easy. If someone tells you otherwise they are mistaken.

Just get a quality 450/550W unit whatever is cheapest. Usually the prices are very similar at lower wattages.
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Celerity
(20 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7-6850K @ 4.5GHz / 1.41v Asus X99 Deluxe II EVGA GTX 980 Ti Classified  Corsair Vengeance LPX 4x8GB 3000MHz 
Hard DriveHard DriveCoolingCooling
Samsung 850 Pro 256 GB Western Digital Purple 2TB XSPC Raystorm Pro XSPC RX 360 
CoolingOSMonitorMonitor
XSPC D5 Photon 170 Windows 7 Professional BenQ GW2765 ViewSonic XG2401 
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Corsair Strafe RGB MX Silent EVGA SuperNOVA G2 750W Fractal Design Define S Logitech G900 
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post #3 of 15
I used this - http://extreme.outervision.com/psucalculatorlite.jsp to do a quick calculation for you.

I erred on the side of caution, and spec'ed it for some extra drives and fans to give you some overhead, and it came out at 558W - Probably any decent 550W PSU will be more than enough, with enough room for and extra couple of drives/SSDs if you want to add these in the future. If you'd not be adding anything to the build ever, A 500W would probably do - If you want room to add a couple of bits, go for a 600W
post #4 of 15
SG05 with the 450W PSU should be more then plenty. SG08 if you want to future proof even more. however you did ask for the smallest.
post #5 of 15
Quote:
Originally Posted by latelesley View Post

I used this - http://extreme.outervision.com/psucalculatorlite.jsp to do a quick calculation for you.
I erred on the side of caution, and spec'ed it for some extra drives and fans to give you some overhead, and it came out at 558W - Probably any decent 550W PSU will be more than enough, with enough room for and extra couple of drives/SSDs if you want to add these in the future. If you'd not be adding anything to the build ever, A 500W would probably do - If you want room to add a couple of bits, go for a 600W

You must have added a lot of stuff, because when I fill in the items the OP is intending to use, it comes out at 304W.

Real life measurements bear that out, even when overclocking the CPU, as shown here:
http://hardocp.com/article/2012/07/25/gigabyte_geforce_gtx_670_oc_video_card_review/10

450W is fine for anything you can put in an SG05
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post #6 of 15
Quote:
Originally Posted by DePlane View Post

i7-3770K
ASUS P8Z77-I DELUXE
16GB G.SKILL 2133Mhz DDR3 (2x8GB)
Western Digital WD Black 1.5TB 64MB Cache SATA 6.0Gb/s
EVGA 02G-P4-2670-KR GeForce GTX 670 2GB 256-bit GDDR5
+
All standard Peripherals (excluding speakers)
Finally, would you guys be so kind as to find me the smallest case possible that is still compatible with everything?

Silverstone SG05-450 would fit the bill. It is the smallest case on the market which fits those parts, plus comes with a 450W PSU that is more than sufficient.

The only possible drawback is that you only have 82mm clearance for a CPU cooler. Thus, if air cooling you won't be getting huge overclocks. You can liquid cool using one of the single 120mm all-in-one coolers (Corsair H50, Antec Kuhler, etc. but not the 2x120 models) but then you lose your drive bays and you would have to go with an SSD.

Assuming this is a gaming build with minor on-air overclocking, I would recommend dropping the CPU to an i5-3570K and the motherboard to an ASRock Z77E-ITX. That will save you $150 and for gaming + overclocking (in the case limitations) will perform identically to the parts you have chosen. That extra $150 can almost buy you a 256GB SSD!!!
Main home rig
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CPUMotherboardGraphicsRAM
Core i5-3570K ASRock Z77E-ITX GeForce GTX 670 8GB Samsung DDR3 
Hard DriveOptical DriveCoolingOS
Intel 330 240GB SSD, Crucial M4 256GB mSATA SSD... Samsung DVDRW CoolIt Eco Windows 7 Home Premium x64 
MonitorKeyboardPowerCase
Samsung 305T Plus, Dell 2005FPW Cooler Master QuickFire Pro mechanical keyboard Rosewill Capstone 450W Lian Li PC-Q11B 
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Logitech MX518 Allsop Metal Onkyo TX-SR505 receiver, Polk bookshelf speaker... 
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Main home rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i5-3570K ASRock Z77E-ITX GeForce GTX 670 8GB Samsung DDR3 
Hard DriveOptical DriveCoolingOS
Intel 330 240GB SSD, Crucial M4 256GB mSATA SSD... Samsung DVDRW CoolIt Eco Windows 7 Home Premium x64 
MonitorKeyboardPowerCase
Samsung 305T Plus, Dell 2005FPW Cooler Master QuickFire Pro mechanical keyboard Rosewill Capstone 450W Lian Li PC-Q11B 
MouseMouse PadAudio
Logitech MX518 Allsop Metal Onkyo TX-SR505 receiver, Polk bookshelf speaker... 
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post #7 of 15
Thread Starter 
I doubt I'm ever going to overclock anyway...
post #8 of 15
Quote:
Originally Posted by WiSK View Post

You must have added a lot of stuff, because when I fill in the items the OP is intending to use, it comes out at 304W.
Real life measurements bear that out, even when overclocking the CPU, as shown here:
http://hardocp.com/article/2012/07/25/gigabyte_geforce_gtx_670_oc_video_card_review/10
450W is fine for anything you can put in an SG05

I did add quite a few bits - I set it for 2 drives, 2 SSDs. a floppy (not that I think they are used anymore) a modem (another thats rarely used), a SATA contoller card, 4 fans, a fan controller and an overclock at 4.2GHz. My thought was that, with all those extras, there was always going to be room for a couple of upgrades without stressing the supply. And good electronic practice is always to overspec a little on the power side of things, Theres no use a 450W running flat out (and hot!) if a 550W can run it at 80 load and have a little headroom. LIke most have said, a 450W will comfotably run it. I was just thinking of covering any overclocking and a couple of extras.

I suppose it's habit - cos i'm an awful one for building a machine with the basics, then adding bits as I go! smile.gif
post #9 of 15
Thread Starter 
The reason I need to go with 450 is because I really need the SG05 to go from my dads house to my moms house.
as for the extra fans and hard drives, the SG05 only comes with 1 120mm front fan and 1 2.5" drive bay and 1 3.5" drive bay.
post #10 of 15
Quote:
Originally Posted by DePlane View Post

I doubt I'm ever going to overclock anyway...

Then why did you spec a $200 overclocker motherboard? If not overclocking, you should get the $100 Asus H77 chipset motherboard.

Based on your graphics card choice, looks as if you will use it for gaming. If that's the most demanding task, then you can rest easy with 8GB RAM and a Core i5-3570K. For stock clocked gaming, you will absolutely NOT see ANY difference in gaming performance WHATSOEVER by going with the $100 H77 motherboard, Core i5-3570K and 8GB RAM versus your $200 motherboard, Core i7-3770K and 16GB RAM. Heck, you don't even need the K CPU.

Use the saved money for an SSD. Thank me later.
Quote:
Originally Posted by latelesley View Post

And good electronic practice is always to overspec a little on the power side of things, Theres no use a 450W running flat out (and hot!) if a 550W can run it at 80 load and have a little headroom. LIke most have said, a 450W will comfotably run it. I was just thinking of covering any overclocking and a couple of extras

A GTX 670 with a quad core CPU (both at stock clocks - OP stated no overclocking) will only use around 300W. A 450W PSU already gives a lot of overhead. Also, that is while running flat out torture testing. Normal gaming will use less, plus when not gaming the system will use under 100W.

Of course if you are accustomed to using PSUs which can't actually put out what they claim on their labels at full operating temperatures, YMMV. However, the Silverstone 450W PSU is proven.
Main home rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i5-3570K ASRock Z77E-ITX GeForce GTX 670 8GB Samsung DDR3 
Hard DriveOptical DriveCoolingOS
Intel 330 240GB SSD, Crucial M4 256GB mSATA SSD... Samsung DVDRW CoolIt Eco Windows 7 Home Premium x64 
MonitorKeyboardPowerCase
Samsung 305T Plus, Dell 2005FPW Cooler Master QuickFire Pro mechanical keyboard Rosewill Capstone 450W Lian Li PC-Q11B 
MouseMouse PadAudio
Logitech MX518 Allsop Metal Onkyo TX-SR505 receiver, Polk bookshelf speaker... 
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Main home rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i5-3570K ASRock Z77E-ITX GeForce GTX 670 8GB Samsung DDR3 
Hard DriveOptical DriveCoolingOS
Intel 330 240GB SSD, Crucial M4 256GB mSATA SSD... Samsung DVDRW CoolIt Eco Windows 7 Home Premium x64 
MonitorKeyboardPowerCase
Samsung 305T Plus, Dell 2005FPW Cooler Master QuickFire Pro mechanical keyboard Rosewill Capstone 450W Lian Li PC-Q11B 
MouseMouse PadAudio
Logitech MX518 Allsop Metal Onkyo TX-SR505 receiver, Polk bookshelf speaker... 
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