Power Supply What kind of power supply would you recommend for a desktop?
Hi everyone, I am building my own custom computer and I was wondering what power supply would fit best. Also this is my first time building a computer.
So far my motherboard and cpu are intel ddr2.
My computer will be a gaming computer so I need to know what kind of power supply would be efficient enough to power it. So do I concentrate on how many watts? If so then how many watts is powerful enough for gaming?
Also are there any other specs I should look at? Thank you.
You need a LOT more information to determine the size of a power supply. For a "gaming" computer, one of the biggest power users is frequently the video card you select. There are cards which can draw several hundred watts by themselves. (there is one that requires a dedicated 420 watt supply!!!)
Add on the wattage of the motherboard, the CPU, the fans, the hard drive, the DVD (particularly if it is a DVD writer), the memory...
Your motherboard manual probably has some baseline specifications in it; start with those. Then look up the information on the video card you have (or are planning to buy).
I run everything from an 80 watt 'pico' sized supply on my firewall to a 250 on my core 2 quad/8GB server to a whopping 750 watts on my dual Opteron running my raid array. My game system has dual 500s.
Sorry, but you need to do your homework on this one...specially with an unknown (at this point) video card.
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#1082 - Corsair HX750W Power Supply Video Review
Buying a Power Supply
If there is any one component that is extremely vital to the operation of a computer, it is the power supply. The power supply should be the highest priority when choosing components; if working with a set budget, invest in the power supply and make compromise elsewhere. The power supply is perhaps the most significant module in every computer system as it supplies stable, consistent power to every other component in the system,
Power supplies must not produce and dissipate too much heat or noise. Bad power supplies are almost always overrated in their peak wattage number. A thumb rule is that one should purchase as much good quality power supply as one can afford to ward off sudden breakdowns, data corruption and possibly physical component damage. If you are building a brand new system, go for anything over 400 watts. Select the power supply that fits into the cabinet you have chosen. Also make sure that there is enough clearance so that it does on interfere with other occupants of the cabinet. Choose a Power supply compatible with the motherboard and the other components you are planning to fit into the case and also one that offers additional plugs in case of upgrades of the computer later on.
Almost all computer power supplies have three voltage rails (3.3V rail, the 5V rail, and the 12V rail).
Wiring coming off an industry standard circuit board will be:
ORANGE +3.3 V
YELLOW +12 V
BLUE -12 V
RED +5 V
WHITE -5 V (May not be present on recently manufactured supplies)
BLACK GND
GREEN POWER-ON (Active high -- must be shorted to ground to force power up)
GRAY POWER-OK
PURPLE +5 V STANDBY
BROWN +3.3 V REMOTE SENSING
(please check with the specification of the manufacturer which may vary)
Ensure that the sockets fit into the components well. Go for one with 20-pin/24-pin ATX Socket (as required) and enough 12V Molex Sockets (4-Pin Molex Connector/Serial ATA Connector/PCI-Express Connector) to power different peripherals inside the computer box. Now-a-days modular power supplies are available where the cable can be plugged and unplugged to many sockets provided in the power supply. In this case one has to use only as much cables as needed. This prevents the inside of the cabinet from cluttering. It is wise to use sleeved cables. Go for the power supply with a cooling fan and lesser noise. Never trust a vender for his words. Go for a more superior, trusted and reliable one, even if it costs more. It will give you years of comfort.
I must repeat again that the power supply should be the highest priority when choosing components; if working with a set budget, invest in the power supply and compromise elsewhere.
Unfortuately, right after my India trip (Jul, 07) I found the machine acting up. In trying to clean the fans and tidy up memory and changing CUP fan, I may have accidentally worsened it. The machine stopped booting altogether. The mobo gets power. Tested the power supply with a power supply tester (borrowed from Duke … got to get one myself). I think the mobo went bad … Its impossible to get replacement for these custom PCs. After several hours of futile effort (by me and Raghu), Iam giving up in this machine and moving on. I already bought another full tower case and transferred the parts over there.
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October 27th, 2010 @ 6:11 am
Unfortuately, right after my India trip (Jul, 07) I found the machine acting up. In trying to clean the fans and tidy up memory and changing CUP fan, I may have accidentally worsened it. The machine stopped booting altogether. The mobo gets power. Tested the power supply with a power supply tester (borrowed from Duke … got to get one myself). I think the mobo went bad … Its impossible to get replacement for these custom PCs. After several hours of futile effort (by me and Raghu), Iam giving up in this machine and moving on. I already bought another full tower case and transferred the parts over there.
October 11th, 2011 @ 4:04 pm
it depends on the PSU if its a decent one with a good output it should be fine.
THe graphic card will give you a warning if it is not getting enough power and should not be damaged
as you have spent a bucket of money on a decent graphic card though another £20/$40 on a 500 Watt PSU wont break you
January 20th, 2012 @ 6:44 pm
I use this card for bf3 and it doesn't run at a good enough fps if it's at a higher res than 1152 x 768 (ON LOW DETAIL).
I have it on the above settings and it runs good. But I want to be able to play it on higher resolutions so I can see better.
But I can't