AMD: the world's first 12-core processor has begun shipping

[duploxxx]

How much memory can you link to a socket for MC ?

For Beckton you can link up to 32 memory DIMMs without loss of speed.

You can use 3 dimms / MC so you end up with 12 dimms/socket. And if you compare the MC of Nehal against Magny you will see that the Magny is able to sustain a bit faster memory speeds when using 2 dimms/MC and 3 dimms/MC Nehalem will drop to 1066 with 2 and 3 dimms/MC in both SR/DR while Magny will only drop to 1066 when using 3 dimms DR

again Beckton is a different price range.

I thing MC's can use around 64GB's of ram in a 8P setup '48core" i could be wrong

Magny is only up to 4P so that is 48 cores and also 48 dimms so it should give a total of 384GB ram with DR 8GB dimms but those are very expensive......

Opteron 6xxx series pricing -- source

Type Clock L2 cache L3 cache Cons. (ACP - TDP) List price
Opteron 6128 1,5 GHz 8 x 512 kB 2 x 6 MB 75 - 115 W €254
Opteron 6134 1,7 GHz 8 x 512 kB 2 x 6 MB 75 - 115 W €489
Opteron 6136 2,4 GHz 8 x 512 kB 2 x 6 MB 75 - 115 W €692
Opteron 6168 1,9 GHz 12 x 512 kB 2 x 6 MB 75 - 115 W €692
Opteron 6172 2,1 GHz 12 x 512 kB 2 x 6 MB 75 - 115 W €917
Opteron 6174 2,2 GHz 12 x 512 kB 2 x 6 MB 75 - 115 W €1078

8 cores for €254
Even the highest-end 12-core seems more than reasonable at €1078

funny as usual a list from a certain source is going around as the final. Well I can tell you some speed allocations are wrong and are actually based on an old doc

DDR3 vs. DDR2?

4/5 instructions per cycle vs 3?

3.3GHz vs. 2.2GHz?

Mangy Cours might match Westmere in FP, but I would be surprised if it surpasses it. i7 currently spanks Opteron 2400/8400 series in FP workloads. I see AMD just fusing two Istanbul cores together as a stop-gap measure to compete at the high-end until Buldozer cores are available. And even then, Intel has Beckton to counter with (8 cores, 16 threads), due out in 1-2 months.


Oh, and for the record, I run a server farm with mostly Istanbul CPUs, so please don't brand me as an Intel "fanboi".

westmere x5680 is a 130W tdp part so you will have to compare against the 6176SE part so it's 2.3 ghz

Magny match Westmere in FP is not fusing just 2 istanbul it will more then tripple the memory bandwith of an istanbul