Sorry I was going to reply to this yesterday and got distracted
Anyway, the CPU-Z stuff looks to be normal really (processor running at proper speed). By the look of it, you have Corsair 1600mhz DDR3 but it is only running at 1333mhz. Here are the specs for that RAM. That could be changed in BIOS to run at 1600mhz at a timing of 9-9-9-24 at 1.5v, which should result in a small improvement in memory performance. The numbers correspond to the CAS Latency (CL), CAS to RAS Delay (tRCD), RAS Precharge (tRP), and Cycle Time (tRAS) settings in BIOS. Any other settings there you can and probably should leave on "Auto".
Re. the 64bit OS, it's my understanding that a Windows 7 license entitles you to use either 32bit or 64bit, so if you get a 64bit ISO, I believe you should be able to install it using your existing key. Unfortunately a fully clean install is required, there is no 32>64bit upgrade process. However you can use "Easy Transfer" to ease moving files to a new install (external HDD or something like that required to back the files up to). I really think with 8Gb installed it will improve your system a lot. In the 32bit system, you'll probably find only 3.25 Gb is available for use (it varies a bit from system to system).
Re. overclocking yes I agree you should iron out any problems before considering going down that route. It is AFAIK a warranty voider but at the same time, AMD pretty much encourage it with their "Black Edition" processors. If you did decide to do it, do your research and start with small tweaks, and monitor stability and temperature. I've overclocked pretty much all of my own systems to some extent in the last 10 years, but each to their own.
I should think R2 is the board revision yes. Do you have an R1 or R2? I'd guess R1 from the BIOS date. Here is a comparison with systems using the same motherboard as you - http://www.userbenchmark.com/System/Asus-SABERTOOTH-990FX/421
Edited by jonuk76, 04 October 2014 - 02:16 PM.