The RAM link you listed is for a 8 GB. RAM kit, not 12 GB. If you are mixing RAM even of the same part number you could have issues. Be sure to run Memtest 86+.
Performance wise you're talking ~ 1% system performance by OC'ing to 1600 Mhz. Many mobos default to slower RAM timings when all DIMM slots are used because more time is required for the memory controller to access all DIMMs. You may not be able to overide the BIOS settings - all you can do is try.
It's also worth noting that with DDR3 RAM which is much faster than DDR2/DDR and has wider bandwidth, timing latencies have very little influence on memory performance unlike with DDR2/DDR so don't be concerned with 9-11-11-29 if that's the best you can do as it probably makes less than .5 % difference in performance.
yea its 8gb but i already have 4gb in my pc sorry i didnt mention it...so i shouldnt care if its at 9-9-9-24 at 1333mhz...thats pretty fast already right?