Need help choosing compitable RAM

SGoodnight

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Aug 27, 2012
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I have an ASUS M4A79 Deluxe motherboard and I want to upgrade to 8gb of RAM. According to the specs "Due to AMD CPU limitation, DDR2 1066 is supported by AM2+ / AM3 CPU for one DIMM per channel only."

I just want to make sure I have this right. If I want to use the faster memory I should get 2x4gb correct? If I go for 4x2 then I will have to get slower memory?

Thanks
 
Solution

Yes, that's correct!! :sourire: Two 4GB modules - One DIMM per channel for speeds 1066MHz and above. It is really not worth 'the shot', i'd say go with DDR2-800MHz which is known to be very stable. Target getting a stable speed and more amount of memory. The difference b/w the speeds isn't noticeable so stick with DDR2-800MHz.

If you need DDR2-1066MHzmemory...

emad_ramlawi

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Oct 13, 2011
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Wow, nice old mobo, i am glad to see that its running fine since you purchased it, i am not surprised just took alook at its specification and VRM and cooling :

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131361

No i dont think thats what they mean when they said that :

"Due to AMD CPU limitation, DDR2 1066 is supported by AM2+ / AM3 CPU for one DIMM per channel only."

i reckon they meant NO dual rank memory in one slot, see in order to cheaping the cost of RAM, manafacturers, used to pull of something similar to RAID 0 in ram, especially in current 8 GB of RAM, they would dual stack them, meaning the ram dimm is supposed to by defualt to be 4 GB but they added another 4 GB at the other side, thus its called Dual Rank, sometimes those rual rank RAM causes issues especially with Asrock mobo`s back in the day.

What you need is single rank RAM, which is more stable and faster, the limit for single rank today is 4 GB per RAM dimm anything higher is dual rank, however there is 4 GB dual rank

I did quick serach and sadly i am not able to find out easily single rank DDR2, you need to find them your sef sadly:


for ex this is dual rank L:

http://www.kingston.com/dataSheets/KVR800D2N6_2G.pdf

i recokn its not about the size and filling the 4 slots on the mobo, you can fill them all, just use single rank RAM

just my 2 cents

today iam sleep deprived so i am sorry for the typos

 

Legohouse

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May 13, 2013
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Yes, that's correct!! :sourire: Two 4GB modules - One DIMM per channel for speeds 1066MHz and above. It is really not worth 'the shot', i'd say go with DDR2-800MHz which is known to be very stable. Target getting a stable speed and more amount of memory. The difference b/w the speeds isn't noticeable so stick with DDR2-800MHz.

If you need DDR2-1066MHzmemory (specifically), then try Crucial or newegg else try this site!!!
 
Solution