is DDR3-1066 simply TOO slow for some motherboards / APUs to manage?

giantbucket

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so i have this Kaveri board (GA-F2A88XM-D3H) and CPU (A8-7600) and i noticed in the spec sheet is says it'll do DDR3-1333 up to DDR3-2166 (and 2400 with OC), but what about the low end? is there any reason that DDR3-1066 won't work, or will it work but it's just so obscure that nobody bothers to list it?

thing is, i have some 1066 sticks, so i wonder if i can use them, or if Kaveri will explode.

i'm actually NOT going to use the built-in graphics anyways, cuz half way through assembling it i tore it all apart and changed my plans so it's going to get a GTX760 for graphics.

i know that mix-n-match RAM sticks is never guaranteed, so the question isn't about that. it's about the speed specs and if technically there is a lower limit to what a CPU can clock to.
 
Solution
Almost forgot to add, mixing two different RAM sets could cause stability issues. It's always recommended to buy all your RAM in one set to avoid any possible issues.

Samat

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There's two DDR3 1066 modules listed on the official memory support list so I'd guess they should work with it (assuming there are no other hiccupus as you mentioned). It could affect the performance a bit, but since you will be using a dedicated GPU the impact should be a lot less compared to using the IGP.
 

giantbucket

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i have 2x4G of 1600(1866) and the leftovers in question are 2x2G of 1066. so i'd potentially go from 8G to 12G of system RAM overall (and the GPU has 2G of its own)

there's already a 240G SSD set aside for the OSes (XP, 7, and Mint) and this'll be my main at-home do-anything machine (though mostly Steam games and other HTPC-type stuff). i have a separate at-work do-anything Z77/i5 machine that currently has 2x8G but i might bump that one too with extra 2x4G sticks.
 

Samat

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To add to all comments, since you already have the memory it shouldn't blow the system up to plug it in and see if it works. If it boots ok also run some test program that use a lot of ram to see that everything works ok. Some memory problems only occur when you actually utilize a lot/most/all of the memory available.