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How many watts i5-2500k & radeon 6870

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January 21, 2012 1:58:54 PM

How many watts power supply would be the best for my desktop?
CPU: i5-2500k
GPU: Radeon HD 6870
RAM: 12gb


Thanks for the help :D 

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a b ) Power supply
January 21, 2012 2:12:59 PM

My system: I5-2500K (OC 4.2 GHz), 6870, 16 gigs ram, 1 HDD, 2 SSDs, on Blu-rqay driv. Running furmark = 350 Watts.
Recommended Quality 450 -> 500 Watt PSU , If you might consider going with Xfire of two 6870, I'd recommend the corsar 650 Watt (more tan you need, but I like to be alittle conserative).

Note : as with any PSU, always check for reviews - PSU selected should always be in the top two tiers.
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a c 274 ) Power supply
January 21, 2012 2:13:46 PM

Quality 500W unit is the minimum required.
I'd go to a 650W with 4 x PCI-E pins if you can afford = more flexibilty for future
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a b ) Power supply
January 21, 2012 2:17:19 PM

let me ask you one thing,how the hell can you run triple channel RAM with 2500k
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a c 274 ) Power supply
January 21, 2012 2:23:37 PM

hellfire24 said:
let me ask you one thing,how the hell can you run triple channel RAM with 2500k

It could easily be DDR3 dual channel.
1 kit 2x4gb
1 kit 2x2gb
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a b ) Power supply
January 21, 2012 2:43:01 PM

^ correct, infact I had that setup (2 x 4 + 2 x 2) on my I5-750, then when to 16 gigs ( which intern moved over to my I5-2500K.
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January 21, 2012 3:03:06 PM

i am using a seasonic x-400 fanless power supply, with a 6850, max 150watts, amd 905e max 65watts, add 35watts for the computer and you get 250 watts. easily supported by a 400 watt psu... heck, i have run a 560ti max 250watt in that system using prime95 and furmark together and without issues. (except for the heat generated lol)
using a quality psu larger than 400 watts will just be quieter (the psu's fan speed is related to power used). cry once (over the price of the x400) and live in blissful silence! in other words buy the x400...
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a c 1195 ) Power supply
January 21, 2012 4:37:19 PM

ryanavolpi said:
Wait, I was planning on using 3*4GB sticks, why wont that work? :( 
http://www.tigerdirect.com/applications/SearchTools/ite...

It's not that it won't work. It will work, but the DIMMs will only be operating in the slower single channel mode instead of the faster dual channel mode.
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January 21, 2012 4:40:39 PM

Sooo... should i go with the 8gb? Will 16gb have the same problem?
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a c 1195 ) Power supply
January 21, 2012 4:45:10 PM

ryanavolpi said:
Sooo... should i go with the 8gb? Will 16gb have the same problem?

Matched 2 x 4GB kit or a 4 x 4GB kit will work fine for dual channel mode operation.
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a b ) Power supply
January 21, 2012 6:14:50 PM

^ Yes, odd sticks = single channel mode when used in p67/z68 MBs
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a c 111 ) Power supply
January 21, 2012 7:47:18 PM

I think the best would either be a quality 500w unit to a 650w unit. Though I would get a 650w unit in case you want to cf that 6870 in the future.
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January 21, 2012 8:22:51 PM

Best answer selected by ryanavolpi.
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a b ) Power supply
January 22, 2012 6:12:02 AM

This topic has been closed by Mousemonkey
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