How much PSU do I need?

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Austin66

Honorable
Sep 27, 2013
9
0
10,510
I have a cheap build I've been working on and I feel like I'm either going to completely over or under estimate how much power I need. My parts are:

Case- NZXT Tempest 210

CPU- AMD FX-6300 six-core 3.5GHz Am3+

Motherboard- ASUS M5A97 R2.0 AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX

Memory- Corsair Vengeance Blue 8 GB (2X4 GB) PC3-12800 1600mHz DDR3 240-Pin SDRAM

Storage- Western Digital WD10EZEX 1TB HDD SATA3 3.5"

GPU- AMD Radeon R9 270 2GB

Optical drive- Lite-on 24x CD/DVD Burner

I'm thinking I'll be fine at 600W but I would like a professional opinion. I've tried 3 different calculators and they all tell me different.

Thank you.
 
Solution
geofelt
PSU calculators are deadly accurate if you give them accurate input.
Unfortunately , some things are unknowable.
Like capacity ageing, or your future needs.
Here is a chart which will work for you.
http://www.realhardtechx.com/index_archivos/Page362.htm
While a 450w psu will be ok for your R9-270, I suggest overprovisioning, perhaps to the 620w level.
1. A stronger psu often costs little more.
2. A stronger psu will operate more efficiently in the middle third of it's range. And... be quieter in the process.
3. If you should ever want a stronger graphics card, a 620w psu will likely be able to handle any single gpu card you might want.

Whatever you do, a cheap psu is false economy. Buy only a quality unit like Seasonic.

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BlackPseudicide

BlackPseudicide

Honorable
Feb 5, 2013
200
1
10,860
400W is enough for that build.

System Type: 1 physical CPU
Motherboard: Regular - Desktop
CPU Socket: Socket AM3+
CPU: AMD FX-6300 3500 MHz Vishera
CPU Utilization (TDP): 85% TDP

RAM: 2 Sticks DDR3 SDRAM
Video Card 1: AMD Radeon R9 270

IDE HDD 7200 rpm: 1 HDD

DVD-RW/DVD+RW Drive: 1 Drive

Fans
Regular: 3 Fans 120mm;

Keyboard and mouse: Yes

System Load: 90 %


Recommended Wattage: 374 Watts
 
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geofelt

geofelt

Titan
Oct 9, 2006
54,277
4,131
174,240
PSU calculators are deadly accurate if you give them accurate input.
Unfortunately , some things are unknowable.
Like capacity ageing, or your future needs.
Here is a chart which will work for you.
http://www.realhardtechx.com/index_archivos/Page362.htm
While a 450w psu will be ok for your R9-270, I suggest overprovisioning, perhaps to the 620w level.
1. A stronger psu often costs little more.
2. A stronger psu will operate more efficiently in the middle third of it's range. And... be quieter in the process.
3. If you should ever want a stronger graphics card, a 620w psu will likely be able to handle any single gpu card you might want.

Whatever you do, a cheap psu is false economy. Buy only a quality unit like Seasonic.

 
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