2133 MHz RAM OK with FX-8350?

Partially INCORRRECT.

*I know the following is long, but you may want to PRINT it for reference. It's only long because I spell it out as clearly as possible.

1) His motherboard manual clearly states it supports Intel XMP v1.2 and v1.3.

2) It ALSO supports the AMD version called "AMP".

*AFAIK not all memory modules use AMP. I would use XMP if listed. If the memory was not detected (BIOS updates sometimes add memory profiles) then XMP will not be usable and probably greyed out.

If XMP is usable then it should have at least one profile available which is usually the maximum rating of the memory plus the applicable timing states.

(Manually setting the timings and frequency can be problematic which is why I like to try XMP first as it automatically assigns them for you based on the profile. You can see more information on the profile values in CPU-ID's software in the "SPD" section).

**Finally, as I said before I'm not sure if XMP even remains working once you start overclocking.

Example of setup:
1. Set CPU to default values in BIOS
2. select XMP, then SAVE the BIOS state
3. reboot and run MEMTEST
(for a FULL PASS which is roughly 30 minutes for 8GB.. may need to change BIOS boot order to boot to DVD or USB stick... or manually select the boot device in the BIOS)

4. Run Prime95
(can increase memory allocated from 2048MB to most of whatever remains which can be seen in the Task Manager). Hard to explain here... run until each core/thread passes then quit. Failure shows as a rounding error which may mean bad memory stick, incorrect setup or voltage issue.

My MEMTEST passed, but Prime95 failed one thread. I was getting BSOD crashing (i.e. Memory_Management and similar error). Pretty sure it's a POWER SUPPLY issue and low load is stable but Windows load is not.

5. Overclock CPU (look at memory settings... if set low such as 1333MHz leave that alone for now)
6. Run MEMTEST and Prime95 again (or other software if it works for you)
7. BIOS-> manually change memory settings (unless there's a simpler method beside XMP that works with overclocking the CPU... I don't have an AMD setup so not exactly sure of how CPU overclocking affects memory setup)
8. retest both MEMTEST and Prime95

*In CPUID's CPU-A software you can look and see what the various memory profiles are to write down the values. Listed for each frequency value which includes:
- frequency, voltage, CAS, RAS etc. (must use all the settings listed for each frequency)

http://www.cpuid.com/downloads/cpu-z/cpu-z_1.74-en.exe

**For example, find the highest frequency profile under the "SPD" section and write down the values. Then go into the BIOS and enter them. There are likely other values you are unsure so leave as default (AUTO?). In some cases the memory is unstable and a small voltage increase helps.

If memory is unstable (MEMTEST and Prime95) I'd first try a lower profile like 1866MHz or 1600MHz and stay there for a while before considering tweaking slightly higher. A said before, more than 1866MHz CAS9 is unlikely to benefit you in real-world usage (1600MHz is probably about the same for most tasks too with that CPU).

Other:
- temperature
- fan profile setup
(temperature and fan should also be optimized for but I won't discuss that here. If confused ask or start a new thread)