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AMD build cpu decision

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April 27, 2012 1:45:38 AM

Helping a friend decide on a processor for his AMD gaming rig and I am personally and AMD noob.

I would just like to know the difference in strictly gaming performance as that will be all this rig will be used for

current options
http://www.tigerdirect.com/applications/SearchTools/ite...

or

http://www.tigerdirect.com/applications/SearchTools/ite...

current mobo: leaning toward

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

seems like it will cover everything for a great price

as far as the cpu's go If you have a better solution in the 100-140 range please let me know thanks again!

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April 27, 2012 1:52:40 AM

For gaming I would go with the Phenom II.
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April 27, 2012 3:35:38 AM

If you are not overclocking the phenom would be the better option. If overclocking there will be some games that will favor the 6100 but only some because it can reach a higher speed, but then again not woth $30.

Motherboard is ok. Id suggest http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Asrock supports sli where gigabyte doesn't. If you don't want sli support, the asrock extreme 3 is $20 cheaper and equivalent to the gigabyte.
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April 27, 2012 8:43:40 AM

The Phenom II 965 is the better choice.
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April 27, 2012 6:21:02 PM

could anyone break down the technical differences between the 2 besides the obvious core amount? would be appreciated
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April 27, 2012 6:36:00 PM

For the record, AMD says that a single Bulldozer module has around 80 per cent of the performance of two conventional CPU cores. In other words, a four-module Bulldozer core should be at least as quick as a six-core processor.

That being said, the 6100 is a 3-module, 6-core cpu. 6*80% = 4.8 true cpu performance. The issue is in light threaded applications, you still take the 20% hit, so the phenom II comes out slightly ahead.

So the real question is will the game you plan on playing use 6 cores or only 4. Most games only use 4 cores, but the newer games are becoming core friendly (BF3, Civ V, Dirt 3, ect)

IMO, $30 isn't worth the difference for a few games, go with the cheaper Phenom II. If they were the same price, flip a coin.
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April 27, 2012 9:11:25 PM

mtech23 said:
could anyone break down the technical differences between the 2 besides the obvious core amount? would be appreciated


The main difference is the actual architecture of the CPU. The "bulldozer" CPU cores are arranged into "modules" each module contains 2 integer processing units and a shared floating point processor. So what AMD may call a 6X in the FX-6100 is actually a 3 Module with 6 integer processing units and only 3 floating point processors. Compared to a TRUE multi core design such as the Phenom II 965 has 4 cores, 4 integer processing units and 4 floating point processors. The FX CPU's have a quite garbage IPC (how much work the CPU actually does per cycle) Because of this a Phenom II 965 @ stock will out perform an FX@ 4.0 Ghz core for core. OC the FX to 5Ghz and the Phenom II to 4GHz and the IPC still holds true. I suggest the 965
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April 28, 2012 8:05:53 PM

Best answer selected by mtech23.
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