How large of PSU capacity do I need for AMD A10 7850K?

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Zeqiang Zhao

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Sep 19, 2013
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I am building an mATX entry-level gaming desktop, and am wondering how much wattage do I need for the A10 7850K APU.
It's thermal design power is 95 w, but I have seen typical power consumption as high as 130 w. I am looking to buy the CORSAIR CX series CX430 430W PSU.
In it's specs it says output: +3.3V@20A, +5V@20A, +12V@32A, -12V@0.8A, +5VSB@3.0A

This is the whole configuration:
AMD A10 7850K ~100w
A88XM-A Socket FM2+/FM2 A88X mATX AMD Motherboard ~20w?
No GPU for the moment.
2 x 4 GB G.Skill RipjawX 2133MHz DDR3

I will be adding a discrete graphics card after 2-4 years maybe, so please take that into account.

I welcome any suggestions to the build as well. Thank you!
BTW, is this build capable of moderate gaming, like, 2-5 year old titles in 720-1080p in medium detail?
 
Solution
logainofhades
This will give you an idea of how far apart they are. This is previous gen arch, but the gap really didn't change much with current gen. The 750k is equivalent to a 5880k/6800k at same clock speed. Also the i3 is on a platform with a superior upgrade path. Even at 4.3ghz, a 750k cannot beat an i3. Clock for clock, Kaveri is about even, maybe slightly better, than Phenom II X4.

Combined-Average-Gaming-Performance.png
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logainofhades

logainofhades

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I would go with this, for less, over the 7850k. It will game far better.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-4130 3.4GHz Dual-Core Processor ($124.99 @ Newegg)
Motherboard: MSI H81M-P33 Micro ATX LGA1150 Motherboard ($42.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Newegg)
Video Card: Sapphire Radeon HD 7770 GHz Edition 1GB Video Card ($89.99 @ Newegg)
Total: $317.96
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-07 13:42 EST-0500)

vs

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD A10-7850K 3.7GHz Quad-Core Processor ($184.99 @ Newegg)
Motherboard: Asus A88XM-A Micro ATX FM2+ Motherboard ($78.99 @ Mac Mall)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($79.99 @ Newegg)
Total: $328.97
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-07 13:43 EST-0500)

For a little more, you could go with this.
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-4130 3.4GHz Dual-Core Processor ($124.99 @ Newegg)
Motherboard: MSI H81M-P33 Micro ATX LGA1150 Motherboard ($42.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Newegg)
Video Card: EVGA GeForce GTX 750 1GB Video Card ($119.99 @ Amazon)
Total: $347.96
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-07 13:46 EST-0500)

Any of these builds will be fine with a CX 430.
 
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naturesninja

naturesninja

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Dec 15, 2013
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Now I know I'm probably going to get flak for this, but price wise the 6800k vs the 7850k makes A LOT more sense. I know the new 7850k has some new features, but I personally don't believe that it's worth the near 50% price increase over the 6800k. And since you're going to be going to a dedicated card in the future, it won't make much sense at that point. I do run the 6800k in one of my builds and use that same psu you are looking at. BUT I don't think that I would add a card to my build without at least a 500w bronze psu. And yes, your build could run 2-5 year old titles at those settings. My 6800k build for my daughter rocks skyrim at medium/high settings without any hiccups. One last thing is that the ram you're looking at is great stuff as these apu chips love higher speed ram where as an fx series cpu for example would MAYBE have around a 1-3% increase in performance going from 1333 to 2133mhz.
 
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Z

Zeqiang Zhao

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Sep 19, 2013
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10,510


Thanks for the suggestion.
I looked up i3 4130 vs A10 7850k on cpuboss, and it seems that they are about the same.
The i3 costs $100 at Microcenter, and the A10 costs $150 there. When combined with MB, you get another 30-40 dollar discount on the MB. So the MB costs 40.
But if we use the similarly-priced MBs for both builds, maybe the AMD build will be cheaper than the i3 build right?
And, the graphics power from 7850k is probably sufficient for now, for titles like StarCraft2, Diablo3, right?

 
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Zeqiang Zhao

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Sep 19, 2013
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10,510


Thanks for your opinion,
7850k now costs 150 whereas 6800k costs 130.
I read from other posts that 7850k is about 15% better regarding graphics performance, about 5% better CPU performance. I do need the extra graphics performance, as im not planning on adding a discrete card until 2-3 years later.
So given the price that I can get for those two processors, would you recommend the newer 7850 instead?
 
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naturesninja

naturesninja

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Definitely. The last I saw the 7850 it was a $185 and the 6800k was around $120. With the new included instructions the 7850 is a better apu, just not at the older price points I was familiar with. but at $150 you can't go wrong.

 
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logainofhades

logainofhades

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Apr 27, 2009
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Microcenter has an i3 and motherboard combo deal too. Any compatible motherboard will get you your discount. CPU boss is a horrible way to compare cpu's. The i3 is superior to Kaveri on the CPU side. Ivy was better than Richland and Trinity. Ivy to haswell wasn't much of a jump and neither was Kaveri vs richland.

http://www.microcenter.com/site/brands/intel-processor-bundles.aspx
 
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Zeqiang Zhao

Honorable
Sep 19, 2013
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10,510
Is there any benchmark or tests that indicate the i3 is much superior to 7850k, and if so, by how much?
I thought that with more cache and more cores the 7850k would be a better performer. Also it has decent graphics so I can use it for gaming without a discrete graphics card at the moment.
 
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logainofhades

logainofhades

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Apr 27, 2009
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This will give you an idea of how far apart they are. This is previous gen arch, but the gap really didn't change much with current gen. The 750k is equivalent to a 5880k/6800k at same clock speed. Also the i3 is on a platform with a superior upgrade path. Even at 4.3ghz, a 750k cannot beat an i3. Clock for clock, Kaveri is about even, maybe slightly better, than Phenom II X4.

Combined-Average-Gaming-Performance.png
 
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