Corsair XMS3 1600Mhz vs Corsair Dominator GT 2133Mhz

Actually it will downclock the all to 1066 MHz. My first concern is the NOT seeing any Corsair 2133 MHz RAM {just A-DATA 1GB AX3U2133XB1G10-FF is listed as Certified}.

Corsair Tested - http://www.corsair.com/configurator/product_results.asp...
Gigabyte Certified - http://www.gigabyte.us/products/product-page.aspx?pid=3...

GA-P55-UD5 http://www.gigabyte.us/products/product-page.aspx?pid=3...

In order to justify >1600 MHz RAM you'd need to EXTREME OC your MOBO and run it on water. I too assume that you have another Data HDD for your important items?

My recommendation - CORSAIR DOMINATOR 4GB (2 x 2GB) DDR3 1600 (PC3 12800) Desktop Memory Model CMP4GX3M2A1600C9 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

What OC are you looking to run?

Wait so i cant even get 1600Mhz modules to 1600? without an extreme OC? ima run the i7 870 at 4ghz

Just get the 1600 modules. You save money. The higher speed ram is always comes with higher latencies which contradict the MHZ speed.

Huh?!

No, you just need to set the RAM Speed and CAS timings in the BIOS; takes 5 minutes. What I was trying to say is that only extreme OC 4.2~4.6 GHz justifies the need for super-fast DDR3 memory 1800, 2000, 2133, 2200 MHz.

Therefore, 9/10 times 1600 MHz is the "ideal speed" to purchase.

I hope that answers your questions clearly.

Okay ill get the 1600Mhz but the 2133mhz are only $10 more from a local store where i live. So still quite undecided, at 4ghz will the dominator GT run at 2133mhz?

^ I think I know the set, it won't work on your rig. Try them BUT make certain that you can RETURN them.

The only fast Corsairs tested for your MOBO {CMG4GX3M2A2000C8} have been deactivated. ONLY purchase Certified or Tested RAM; everyday 5-10 RAM Problem posts are caused my incompatible RAM. Keep in mind there are ~ dozen different RAM controllers and some work and other will never work.

Options:
G.SKILL Tested - http://gskill.com/configurator2.php?pid=2&model=164

G.SKILL Trident + Turbulence 4GB (2 x 2GB) DDR3 2133 (PC3 17066) Model F3-17066CL9D-4GBTDS http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Higher buss ram comes with higher timings but you have the headroom to tighten them up giving you more robust ram than the default set 1600 by manually setting your timings. So since the 2133 ram has its listed timings which are higher than the 1600s timings, you can under clock it to 1600 and lower your timings considerably like clock your cas latency to 6 and that my friends is the "start" of some happy timings not possible on the stock set 1600 unless you under clock them which would result in a buss lower than 1600   So you can now understand the need for that high transfer rate when lowering your ram timings to get the fastest response out of them. OC ram clocked down to default buss = faster timings then stock ram. So are you running at full 2133? No but you are running faster timings than stock 1600s because it was rated to run at 2133 you clocked it down and it gave you headroom to lower your timings. Makes sense yes? Applause please!