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Psu help
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Member
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26. October 2009 @ 09:15 |
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Hi guys i need a little help on deciding what psu i need for my pc. I think it is very very underpowered for that stuff i have in it.
Here is a spec sheet of what is in it, also there is 4 120mm fans and a Asus Silent Knight II cpu cooler, here are the specs sheet
i would all so like to remove the 4 gb of memory of and replace it with 8gb of dd2-1066 aswell as crossfiring a ati 3870hd (i have one all ready in the) so i would need 2 6 pins for the graphics and one 8 pin for the motherboard.
thanx guys
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AfterDawn Addict
4 product reviews
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26. October 2009 @ 16:36 |
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There is no point crossfiring the HD3870s. The HD3870 is no more powerful than an HD4670 you can buy for $60 that uses a third as much power. On top of this, one HD5750 is faster than two HD3870s or two HD4670s, and only costs $130. That will be much easier on your PSU.
A lightly overclocked Q6600 with 4 HDDs and a single HD5750 will require a PSU of 300W. The same with two HD3870s will require a 450W PSU with two 6-pin PCIe power connectors. In these cases I would recommend a Corsair CX 400W and HX 520W respectively.
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AfterDawn Addict
3 product reviews
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26. October 2009 @ 16:43 |
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Use This Link to find out what watt you need.
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Make poverty history, cheaper drugs NOW! This message has been edited since posting. Last time this message was edited on 26. October 2009 @ 16:47
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AfterDawn Addict
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26. October 2009 @ 16:44 |
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Don't use that PSU calculator, it massively overstates the PSU you need for your system. It gives you a 'worst case scenario' but only for when you've upgraded loads of components. A 250W system it will typically rate you a 400-450W PSU for, at the least.
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AfterDawn Addict
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26. October 2009 @ 16:49 |
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Originally posted by sammorris:
Don't use that PSU calculator, it massively overstates the PSU you need for your system. It gives you a 'worst case scenario' but only for when you've upgraded loads of components. A 250W system it will typically rate you a 400-450W PSU for, at the least.
Really didn't know that. Is that "this" PSU calculator or any?
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This message has been edited since posting. Last time this message was edited on 26. October 2009 @ 16:51
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Member
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26. October 2009 @ 17:56 |
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Ok thanks for the help! I was looking at the two HD3870's as i thought it would be cheaper but i think i will wait untill the price drop in the new year for the HIS Radeon HD 5850 1GB.
The psu i have is a trust 580w but it a cheap psu and i wan't something more stable for overclocking and as i say it need the 8-pin for the motherboard too.
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AfterDawn Addict
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26. October 2009 @ 19:36 |
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Mike: Certainly Outervision in particular, but there is only one PSU calculator I've seen that's realistic, and amazingly enough it's this one:
http://www.corsair.com/psufinder/default.aspx
You would think that Corsair would try and exploit the consumer by advocating too much power, but this tester seems very accurate, the lowest rated PSU there is usually about right for the system, not underpowered, but not excessive.
With a cheapo PSU like a Trust, you should definitely get a new unit as soon as possible. I stand by the PSUs I recommended.
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Member
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27. October 2009 @ 07:41 |
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Ok thank you Sam!
Cheaper than i thought lol
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Member
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27. October 2009 @ 08:45 |
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What do you think of the ATI 5870HD?
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AfterDawn Addict
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27. October 2009 @ 10:06 |
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The HD5870 is a spectacularly powerful card, but because it has no opposition ATI can really charge whatever the hell they like for it, thus it's way overpriced. The HD5850 is still 85% as powerful, and only costs 70% as much.
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Member
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27. October 2009 @ 16:46 |
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ummmmm in uk prices that is a £60 diffence beteew the two card is it worth it?
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AfterDawn Addict
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27. October 2009 @ 17:33 |
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Not really. The only time I would recommend it is for top-end crossfire configs, you want the absolute fastest currently possible.
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