[Asus  Eee Pad Transformer Prime] shinzz:
Not entirely true...

Too lazy to explain it myself so I'll copy and paste a quote from Androidpolice user..

http://www.androidpolice.com/2012/0...hmark-11-modern-devices-compared-in-13-tests/

"The most basic description of write buffering, for those who might not be familiar, is that there's a small amount of RAM (also called 'cache') that is used for performing operations more quickly. When an app wants to write something to storage, it is first written to this RAM (which is REALLY fast), and then the I/O controller takes responsibility to write that data to long-term storage (a much slower operation). Occasionally, read times can also be affected if they try to get data and find that it's still available in the write cache. For this to be useful, it has to be enabled (in the kernel) and code written to handle the read/write operations."

Now, let me quote from Anandtech...

http://www.anandtech.com/show/5072/nvidias-tegra-3-launched-architecture-revealed/2

"Tegra 3 supports higher frequency memories than Tegra 2 did, but the memory controller itself is mostly unchanged from the previous design. While Tegra 2 supported LPDDR2 at data rates of up to 600MHz, Tegra 3 increases that to LPDDR2-1066 and DDR3-L is supported at data rates of up to 1500MHz. The memory interface is still only 32-bits wide, resulting in far less theoretical bandwidth than Apple's A5, Samsung's Exynos 4210, TI's OMAP 4, or Qualcomm's upcoming MSM8960. This is particularly concerning given the increase in core count as well as GPU execution resources. NVIDIA doesn't expect memory bandwidth to be a limitation, but I can't see how that wouldn't be the case in 3D games. Perhaps it's a good thing that Infinity Blade doesn't yet exist for Android."

Finally.. a quote from semi-accurate..

http://semiaccurate.com/2011/11/09/tegra-3-missed-performance-goals-by-wide-margins/

"The main problem is that Nvidia doubled the core count, 2 to 4, upped shaders from 8 to 12, and didn’t add any memory controllers. They still have one controller for all of it, but the maximum speed is upped from 600 to 1066MHz LPDDR2. This would be significant if Tegra 2 wasn’t already a laggard in this area, and the speed increases actually make up for the increases in horsepower. Additionally, L2 cache remains the same as Tegra 2 carries, compounding the memory pain."

It's all related in some way. In order for that single I/O controller to improve in performance ... and the bandwidth to improve... they basically need to increase CPU clock speed & beef up the RAM to speedier one. Notice how TF300 and TF700 has slightly improved performance with DDR3??

I doubt this is the main reason (most likely poor kernel & drivers) for poor performance in I/O... but it def. is part of the issue. As for gaming... it is much bigger issue... especially on graphic intensive games where you need steady flow of bandwidth at peak performance.

Edit: You should try out Acer A700. By using T30 tegra 3 SoC (same as Prime) & pushing that display to 1080p resolution... it's a sluggish nightmare. The lack of bandwidth to perform smoothly due to single I/O controller probably doesn't help that tablet at all...