G.Skill memory kit compatibility question

[Furieux]

Hi guys,

I just bought 2x4gb of F3-8500CL7D-8GBRL and I already have 3x2gb of F3-10666CL7T-6GBPK. My motherboard is an ASUS M4A89GTD PRO/USB3 and my processor is an AMD Phenom II X6 1055T. What I will do is remove one stick of 2gb and put the 8gb kit in the remaining mobo slot.

My question are : Will both kit of memory will be compatible in dual-channel operation, is it ok to mix these two kits (they both have the same timing) ? And also, could you let me know which BIOS settings would be the best to run both kit together ?

[Furieux]

I would also like to know which arrangement would be better :

My slot are like this : A1-A2-B1-B2

should I put the memory like this 2-2-4-4 or like this 2-4-2-4 ???

[Tradesman]

you've got a mix of 1066 and 1333 sticks that run on different timings with both sets based on CL7, you can experiment but not thinking you'll have a lot of luck, even if you had bought 2x4GB of 1333/CL7 sticks would prob have a hard time. Would if you want to try to add additional sticks to what you have, return the 1066 sticks and get a set of 2x4GB 1333/CL7 sticks. You might be able to get one of these sets to work:

http://www.newegg.com/Product/Produc...odeId=1&name=7

but I wouldn't count on it.

[Furieux]

you've got a mix of 1066 and 1333 sticks that run on different timings with both sets based on CL7, you can experiment but not thinking you'll have a lot of luck, even if you had bought 2x4GB of 1333/CL7 sticks would prob have a hard time. Would if you want to try to add additional sticks to what you have, return the 1066 sticks and get a set of 2x4GB 1333/CL7 sticks. You might be able to get one of these sets to work:

http://www.newegg.com/Product/Produc...odeId=1&name=7

but I wouldn't count on it.

I thought they both had the same timing of 7-7-7-18 ??? I thought having the same timing was enough to have a good compatibility ??

If I experiment, which arrangement should I try ?? 2-4-2-4 or 2-2-4-4 ?? Also, could you point me out which BIOS settings should I use with this combination ??

[Tradesman]

Problem is you'll want the same timings and base freq, instead of having bases of 1066 and 1333. Typically if you have 1333 sticks set for 9-9-9-27 and want to run them at say 1066 you'll set the timings down to 8-8-8-24 or so. If this was Intel I'd suggest going 1-3 with the 4 GB sticks and put the 1066 sticks in 2-4, but w/AMD no telling where to even begin to start with the mixed sticks