Which PSU to get

[Cirrus]

How much Wattage is necessary for certain builds...

Right now on new egg I have this lined up so far:

Case: Newegg.com - Antec Nine Hundred Two Black Steel ATX Mid Tower Computer Case

Mobo: Newegg.com - EVGA P55 SLI 132-LF-E655-KR LGA1156 Intel P55 ATX Intel Motherboard

CPU: Newegg.com - Intel Core i5-760 Lynnfield 2.8GHz 8MB L3 Cache LGA 1156 95W Quad-Core Desktop Processor BX80605I5760

PSU (550 W): Newegg.com - OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V SLI Ready 80 PLUS Certified Modular Active PFC Power Supply

GPU: Newegg.com - GIGABYTE GV-R577SO-1GD Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

RAM: Newegg.com - G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL

Optical Drive: Newegg.com - LITE-ON Black 24X DVD+R 8X DVD+RW 8X DVD+R DL 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA CD/DVD Burner - Bulk - CD / DVD Burners

Is the PSU enough for this build? How do I discern how much wattage I need for future builds?

 

[Sean W.]

on sale!

Newegg.com - CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply

 

[Cirrus]

on sale!

Newegg.com - CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply

Thats more expensive than the PSU in my build! but it has more wattage than the one in my build too :/ I don't get how much wattage I need!!!

 

[Slaymate]

I would spend the few extra dollars on the Corsair

 

[Cirrus]

YOU GUYS, HOW DO I KNOW WHAT TO BUY!? I really don't understand how much power is necessary

 

[Sean W.]

plus it will give you a little growing room to get another 5770 in like a year when they are only $60

 

[mikemelo1369]

Cirrus,

In general if memory serves me correctly I believe the processor drains about like 135W of power so to determine your watt requirement you really need to look into the watt requirement for your Video card. This is what your PSU provides most of it's energy to.

Try not to compare to prebuilt computers as a lot of people basically overkilling their system. 1k PSU are almost never needed. If you're going to get a higher end video card or if you want to crossfire I would recommend something like a 700-800W unit.

For your unit I would suggest 600-650W. I don't believe you would require more power than that.

Keep in mind this is from what memory serves me so if someone wouldn't mind confirming my details that'd be solid.

 

[Yami]

Cirrus,

In general if memory serves me correctly I believe the processor drains about like 135W of power so to determine your watt requirement you really need to look into the watt requirement for your Video card. This is what your PSU provides most of it's energy to.

Try not to compare to prebuilt computers as a lot of people basically overkilling their system. 1k PSU are almost never needed. If you're going to get a higher end video card or if you want to crossfire I would recommend something like a 700-800W unit.

For your unit I would suggest 600-650W. I don't believe you would require more power than that.

Keep in mind this is from what memory serves me so if someone wouldn't mind confirming my details that'd be solid.

In all... yeah, pretty much

 

[Fat.Clown]

I run a similar setup i5 750 hd 5770 2x2gb of ram with a corsair 400cx

so your 550 watt is fine

 

[patonb]

Try not to compare to prebuilt computers as a lot of people basically overkilling their system. 1k PSU are almost never needed. If you're going to get a higher end video card or if you want to crossfire I would recommend something like a 700-800W unit.

Actually pre-builts almost always put the bare minumum psu, and very cheap psus too.

1000W psus are becoming mnore common due to the high end gpus, gtx 47080s and 5980s sucking lots of power.

To the OP, 550ish or more will do, there are a few psu calculators out there that are actually accurate.

The other factor is psus last for a while... couple builds if you don't get stupidly crazy, so running a bit higher, and good quality, is a sound investment.