Compatibility of 1833Mhz RAM With Phenom II x4 965 with asus mobo M5A99FX PRO R2

[SofoklesPCFIXER]

First of all i'd like to thank you all in advance for your effort you provide to users (advanced to newbies) , and i mean this great website which helped me a lot last 5 years or more and the people who answer to questions and believe me answers might save your pocket in many cases and/or situations!
So, my ex mobo was asus crosshair 2 which stoped recognize my sata2 hdds sometimes after hours could start but mostly didnt so i bought a new mobo and better and newer model>> ASUS M5A99FX PRO R2 << which was nice price for my pocket and could accept my
>> AMD Phenom II x4 965BE :CPU<< and my
>> ASUS ENGTX 560 DCII TOP : GPU<<
but doesnt support ofcourse my
>> 4x RAMS: DDR2 G.Skill 1033Mhz (Clockable)

So i have to ask for your help:
Does a 1833Mhz supported by this CPU i have? Cause i read in a page that, that CPU supports until 1333 and in another webpage until 1600.
I would like to buy the last Freq. that my new mobo supports and that is the 1833Mhz so when i buy a new CPU better that this i have now to have a ready advadance and so will work at 1833 until the OC freq. which my new mobo gives 2400Mhz...

So question 2. Is it possible to work a pear of 2 RAMs 8gb each so to have 16gb at a total at a lower freq. ? or If i try through BIOS/UEFI to see it at its own origina freq?

3rd question : as lower is the CAS so its better or worst? I remember is that the lower is the CAS amount so its better! right? I want to avoid buy in one or two years another pear with 1833Mhz so to have the advadance of a newr CPU so to buy another same pear of RAMS so to have 32gb at my four slots that why i want also for now to buy those of 1833Mhz freq.

Also i do these questions so to avoid BSOD or memory errors or other falses
last question is : should i look for a non-ECC or with ECC?
should a Corsair Vengeance 16GB DDR3-1866MHz (CMZ16GX3M2A1866C10) or G.Skill Sniper 16GB DDR3-1866MHz (F3-1866C10D-16GSR) or G.Skill ARES F3-1866C10D-16GAB or G.Skill RipjawsX F3-14900CL10D-16GBXL (8Gx2) or a G.Skill RipjawsX 16GB DDR3-1866MHz (F3-1866C9D-16GXM) or G.Skill Sniper 16GB DDR3-1866MHz (F3-1866C9D-16GSR) or Corsair Vengeance Pro 16GB DDR3-1866MHz (CMY16GX3M2A1866C9) and whats their dieferences if have the same frq and numbers? those with 9 cas ans those with 10 cas? i would like to be able the rams to OC!
thanks a lot and sorry

 

[Lutfij]

1| + 2| According to your motherboard specification page the maximum ram frequency your board supports is 2133MHz while the maximum ram capacity your motherboard supports is 32GB if you populate the slots as 4x8GB. You can pick up pretty much any 4x8GB kit clocked at 2133MHz rated for 1.65v operation though it'd be good if you could track down memory kits that are (short)listed on Asus's memory QVL.

You would be advised to update your BIOS to avoid any compatibility issues though.

3| If it's only within the 1866MHz range then try and get CAS latency of 9 and not 10 or 11. I'd say pick this.

4| If the upgrade to your system is intended to see server duties or places where data corruption is undesired then ECC will be needed but if for regular use then non-ECC will be more than fine.

 

[SofoklesPCFIXER]

Thank you very much sir! But you seem you missed my first and basecaly question>> my subject is more focusing about the compatibility of those rams with my CPU amd phenom 2 x4 965be because i allready know about what my new mobo may add as about the rams list !!! I ask it clearly above .... Thank you in advance sir!
my hotest quest and question is >>Does a phenom 2 x4 965be recognize and works with those rams? (eg. DDR3 1866mhz 9CAS dual DIMM 2x8gb = 16bg) with this mobo?
And so is it possible a kit of two 8gb rams (=16gb) at 1866 underclock to 1333 as i know that 1333 mhz is the highest frequency that supports my CPU? and if not... Can i buy a 1600mhz kit and underclock it to 1333 (manualy or automaticaly by my new mobo) so to work with CPU? The reasons are 2
Firstly i want to gain lower CAS that if i had a 1333mhz rams with higher CAS
and secondly and most serius is to avoid afford money for new rams when in future i'll buy a newr CPU model