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[SOLVED] Picking my PSU

This is a discussion on [SOLVED] Picking my PSU within the RAM and Power Supply Support forums, part of the Tech Support Forum category. Hello, Now I'm aware that there are dozens of posts like this out there, and even a sticky to help


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Old 06-13-2009, 02:55 PM   #1
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Hello,

Now I'm aware that there are dozens of posts like this out there, and even a sticky to help people like me in deciding what type of PSU I should buy, but I have other problems that prevent me from making use of these.

Recently I decided I would upgrade my computer a little for gaming by putting in a new graphics card. I'm almost certain I'll be getting a Radeon HD 4870. So far I've found that ATI recommends a 600 watt supply for using the 4870, but I just want to clarify something. Does that mean it needs at least 600 watts or is it roughly including the average wattage use of other parts of the machine such as the CPU, networking card, sound card, etc.? If thats the case, how accurate are these predictions?

I guess what this is getting down it is what kind of Power Supply will I need to support the Radeon HD 4870 with all my other specs? (Listed below(I'm unaware of the watt usage of any of these or the amount of wattage my current PSU has.))

OS: Windows Vista Home Premium 32-bit
Graphics Card: NVIDIA GeForce 9300 GE
CPU: 2.10GHz AMD Phenom 8450 Triple Core
Motherboard: Pegatron Corperation Narra3
DRIVES:
500.11 Gigabytes Usable Hard Drive Capacity
321.29 Gigabytes Hard Drive Free Space
Generic- Compact Flash USB Device [Hard drive] -- drive 1
Generic- MS/MS-Pro USB Device [Hard drive] -- drive 4
Generic- SD/MMC USB Device [Hard drive] -- drive 3
Generic- SM/xD-Picture USB Device [Hard drive] -- drive 2
ST350062 0AS SCSI Disk Device (500.11 GB) -- drive 0
Memory: 3070MB

Thank you for your help!
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Old 06-13-2009, 04:45 PM   #2
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For the 4870, yes 600 watts will run it, but that is the bare minimum and pretty close to capacity. If this were my rig, I would shoot for a 650 watt Corsair:

https://www.newegg.com/Product/Produc...82E16817139005
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Old 06-13-2009, 04:49 PM   #3
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Hey, thanks for your response and that link Tumbleweed. Will that site ship to Canada? If not then my local BestBuy sells a 700 watt PSU for $150 CAD. If I only need 600-650 watts where does that extra 50-100 watts go if I were to use that 700 watt PSU?
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Old 06-13-2009, 05:02 PM   #4
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Newegg Ca> https://www.newegg.ca/Product/Product...9005&Tpk=650tx

Best buy sells a lot of low quality PSU's for top dollar prices.

The PC will only use what it needs for power.

The 750Tx is only a couple of dollars more> https://www.newegg.ca/Product/Product...82E16817139006
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Old 06-13-2009, 05:17 PM   #5
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Alright, one more question. Do I know for sure that this will fit in my computer and all the plugs will fit into the right spots? Are their certain dimensions or types of computer that these PSUs are made to fit in?
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Old 06-13-2009, 05:25 PM   #6
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Providing it's not a small form factor PC in which case video card will not fit it will be the ATX standard for size and connectors. You will have more then needed to supply your system just roll the extras up and stash them in an unused drive bay.
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Old 06-13-2009, 05:32 PM   #7
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ncix has the 850 in their limited quantity weekly special. Great deal, but more than you need. https://www.ncix.com/products/index.p...6&promoid=1025


Your computer is an hp/compaq? As long as it isn't a small form factor case, shouldn't be a problem fitting. What model is it?
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Old 06-13-2009, 07:07 PM   #8
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My model is a SR5552F
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Old 06-13-2009, 10:59 PM   #9
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Here's a link to your service manual. https://h10032.www1.hp.com/ctg/Manual/c00840496.pdf

The case looks big enough that it should be a standard sized atx psu in there. Give it a quick measure for height, width, and length.

One thing I noticed is that you have a nVidia chipset and onboard graphics. May be best to use one of their cards and avoid possible driver conflicts.
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Old 06-15-2009, 05:26 AM   #10
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250 GTX or 260GTX would be a wiser choice for those systems with Nvidia chipsets, the ATI card will work but often times a driver struggle occurs and those arent fun
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Old 06-17-2009, 11:02 AM   #11
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Yeah, I've been hearing a lot about using an NVIDIA instead because of my chipset. I think I'll go with that then. And I measured the dimensions on that 750 watt PSU and it will almost certainly fit. Thanks for the help everyone
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Old 06-23-2009, 08:36 PM   #12
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Thanks for the help everyone. I finally decided on getting a Corsair TX650W from Memory Express and it's working perfectly. I haven't noticed a change in heat yet. For any future buyers, beware that there are many many wires in this package. I didn't think that would be a problem but it almost was.

Thanks everyone!
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Old 06-24-2009, 12:32 AM   #13
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Good to hear it work out well:)
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