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Windows 7: Planning to upgrade - Help needed regarding PSU

20 May 2015   #1

Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
Planning to upgrade - Help needed regarding PSU

Hello,senior members.....I'm planning to upgrade my old PC, for playing the latest games. I have two graphics cards in my view - AMD R9 270x 2GB DDR 5 or Nvidia GTX 960. Both of these need at least 600wt as far as I know, so I'm going to buy Corsair 650Wt PSU for that. Presently I have APC Back-UPS 600. If I go with either of these cards and the Corsair 650Wt PSU, do I have to go for a new UPS too?? I'm worried as we have frequent voltage fluctuation in our area..... and also I don't have AC in my room, so I have to depend upon CPU coolers only. And also,how much the electricity bill will be affected with this 650Wt PSU???

My System SpecsSystem Spec
20 May 2015   #2

Windows 7 Ultimate SP1 (32-bit)

I think a Corsair 500W-550W PSU is already good enough. Try using this >PSU Calculator< from Cooler Master to find out exactly but if you have spare cash then go for the 650W. Regarding the UPS, I dont have knowledge on that... Sorry. Best of luck with your upgrade, hope someone can help you about your concern on your UPS.
My System SpecsSystem Spec
21 May 2015   #3

Windows 7 Home Premium 64-BIT

Follow System Info - See Your System Specs to fill in your System Specs with as much info as possible. We're looking for something like the example below:

As for the PSU, follow what Ian said. Remember to always buy 80Plus certified PSUs so we can be safe.

As for that UPS, I wouldn't need to buy a new one. It is the PSU that will give juice to the components inside a system unit and not the voltage regulator.
My System SpecsSystem Spec

21 May 2015   #4

Windows 7 Pro x64 sp1

Quote   Quote: Originally Posted by jits View Post
And also,how much the electricity bill will be affected with this 650Wt PSU???
The 650W psu doesn't actually use 650W all the time - it's the maximum it can supply (although in practice psu's are 80-90% efficient). The psu delivers however much the pc draws, up to its max rating. So swapping out a 650W psu with a 800W psu will not use any more electricity at the mains socket. The pc uses more electicity when say encoding a video (high cpu) or hard gaming (high gfx).

When calculating psu watts, it's a good idea to go for a slightly larger capacity than the bare min required, to give yourself a bit of extra headroom. However - don't go crazy and get a psu that's way larger than you need, because a (say) 1500W psu running at 30% of its rated capacity is less efficient than a 650W psu running at 75% of its max. In that scenario, on the same pc, the larger psu would use a bit more electricity.
My System SpecsSystem Spec
22 May 2015   #5

Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1

Thank you all for your answers...
@IanDrexP - Yes I'll certainly go for a 650Wt PSU,Corsair, if the budget allows me.
@RoasterMen, I've used the utility and edited my system info...some places are blank still, I hope to get my new system in the next week,and then fill up the new specs.
@badcrc,I'm definitely not going to buy anything larger than a 650Wt PSU...I think my budget allows me to go as far as 650Wt only.
Thank you all again for these prompt replies.....
My System SpecsSystem Spec
22 May 2015   #6

Win-7-Pro64bit 7-H-Prem-64bit

EVGA has a nice line up of P2 models that are A lot cheaper than Corsair and just as good
EVGA - Products - Power Supplies
My System SpecsSystem Spec
22 May 2015   #7

Windows 7 Pro x64 Windows 10 Pro x64

My System SpecsSystem Spec
22 May 2015   #8

W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM

Quote   Quote: Originally Posted by AddRAM View Post
I also recommend EVGA, Corsair doesn`t even make their power supplies.
Doesn't matter who makes them, they're top quality PSUs.
My System SpecsSystem Spec
22 May 2015   #9

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit


Before you buy ANY power supply, tell us what brands and models in the 500 to 650 watt range are available to you from your suppliers.

Or better yet, post a direct link to your suppliers so we can see what they have to offer.
My System SpecsSystem Spec
22 May 2015   #10
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

As far as I can remember EVGA power supplies haven't been on the market that long so I really don't know how good they are.
Corsair power supplies have been here a long time with a outstanding reputation.
My System SpecsSystem Spec

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