I wanna have some fun with this little APU

May want to add some VRM cooling first!

6670 or 6570

6770 won't do dual graphics.

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The GPU performance of the APU's increases substantially when you get quicker ram.

Achieving the best possible bandwidth, and the highest possible memory clocks, are far from the same endeavors. I see bench-marking sites pointing to increases in GPU performance on these APUs by increasing memory clock speed, but if you do the math, it's obvious that there are a lot of wasted cycles on the bus. We KNOW that the memory BANDWIDTH is the primary bottleneck going on here. Don't just shoot for the highest possible clock speeds on that memory. Download a memory bandwidth bench-marking tool and go to work. Find out where that memory controller actually gives you the best bandwidth.

To put into perspective what I am trying to convey here... Tomshardware Sandra 2012 SP4c Pro benches for memory bandwidth put a llano 3850 on DDR1866 at about 17GB/s. There are a ton of examples of dual channel chips flanking that performance on 1333 speed memory. The theoretical bandwidth peak of 1866 speed memory, is something like 30GB/s. Obviously, there is a lot of "room" to grow the GPU performance just in memory bandwidth WITHIN reasonable speeds if you can find the clock/timing configuration that results in the best real world bandwidth.

At the end of the day, it's going to be the effective bandwidth that makes the difference for the integrated GPU, not the clock rate. Finding the absolute peak bandwidth, will be a process of trial an error and is probably something nobody has bothered exploring and sharing the results of for APUs because, well, it's not considered an "enthusiast" platform. Get some RAM that has a ton of headroom for potential clock/timings/etc, so that you can dial in the limits of the IMC. My suggestion would be the 1.25V 2x4GB G.skill sniper kit, on newegg currently priced $40, or the Samsung 30nm "WondeRam" for $36.

Hi,
I just wanted to mention that u might wanna increase u re NB frequency. I have 3670k and besides memory, increasing NB freq. gave me slight boost about 5% in games and 3d mark tests. It does not affect any CPU benches as far as i noticed but does improve frame rate and memory tests. Not sure if it has same effect on 3870k but it migh be worth a try. Here are few pics.

with nb oc

without


and 3dmark with nb freq. oc

3d mark without nb freq. oc


Idk if it will work the same for 3870k that u have my results are from 3670k so u might already have nb runining at higher freq. Try it and let us know if t makes any difference.