Yeah,

So I'm working on a new rig with the A10-5800K at its heart and I'm planning on running dual graphics with a Radeon HD 6670. I heard that if you're planning on running dual graphics there is no reason to spend more money on the GDDR 5 version as dual graphics only supports DDR3, is this true? Also is there any real performance difference in getting the 2gb version of the card over the 1gb? 

GDDR =/= DDR, they are separate and not equal. But considering the fairly lackadaisical power of the 6670 and taking away the drawbacks of dual graphics, you wouldn't notice a different between a GDDR5 and GDDR3 card, and sure as hell won't notice the difference between 1GB and 2GB.

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Crosshair IV Formula, Phenom II x4 965 w/ Corsair H60, 8 GiB OCZ Platinum DDR3 1600, XFX HD 7970 Ghz, 512GB Vertex 4, 256GB Vector, 240GB Agility 3, Creative X-Fi Titanium w/ Creative Gigaworks S750, SeaSonic X750, HP ZR2440w, Win 7 Ultimate x64

More memory on a graphics card allows you to run at higher game video quality and/or higher resolutions.  i.e. if you choose to run multiple monitors while gaming and want higher quality game graphic settings such as textures and AA you need more graphic card memory to store that data on.....being that you are wanting to pair an the APU's GPU with a discrete card, it won't matter.  You will most likely experience better performance just using the discrete graphics card than with both combined.

Cheers!

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Requiescat In Pace AMD Processor Forums | Member since: 1/19/2009 | Post count: 4142
Please don't PM me with questions, instead create a thread so that everyone can assist and benefit from the knowledge provided. Thanks in advance!