Our single-threaded Acrobat workload sees some benefit from faster memory. The Acrobat test also gains from the Core i7-4770K's higher thermal ceiling and larger shared L3 cache.

We typically disregard performance differences of one second or less, since rounding can exacerbate tiny deltas. We don’t see a consistent trend in memory performance in After Effects; we only know that maximum memory capacity plays a big role in how long this test takes to finish.

Data rate has no discernible effect on Photoshop’s CPU-heavy filters, but faster memory does help its OpenCL-accelerated performance. The LGA 1150-based Core i7-4770K is particularly limited by memory throughput.

Our Adobe Premiere Pro workload doesn't correlate clearly to memory performance. Instead, we end up with a five-second margin of error.

- Did You Know Mobile Haswell Doesn't Support 1.5 V DDR3?
- Ripjaws DDR3-1866 Low Voltage
- Ripjaws DDR3-1600 Low Voltage
- G.Skill Standard DDR3-1333
- Test Hardware And Software Configurations
- Results: SiSoftware Sandra
- Results: 3DMark
- Results: 3D Games
- Results: Adobe Creative Suite
- Results: File Compression
- Power, Efficiency, And Final Thoughts
The R version has 128MB of L4 cache. At 1280x720, it is large enough for all index and vertex buffers and most textures. That is why main memory speed doesn't significantly affect Iris Pro 5200...
intel claims that the edram costs around $80. that'd jack the a10 6800k price over $200 only to benefit the igpu (possibly the same with gddr5). imo, the weaker cpu cores wouldn't benefit much, if at all. that'd make the apus of poor value and people will argue against the apus claiming you can have a faster configuration under $200 (e.g. core i3 4110/fx6300 + radeon 7770/7750) without requiring the edram. as for core i7 4770R (and other R skus) - it's way too expensive. afaik, brix pro is barebones, the whole pc might cost near $800-1000 fully configured.
Simply wait for Broadwell-K near the end of this year and you will get the option of buying a $300+ i5 or $400+ i7 with 128MB L4 cache and Iris Pro.
From what little info leaked about it so far, it is still unclear whether or not there will be an option to buy a desktop Broadwell without that ~$100 extra.