Originally posted by: SAREQ
I buy 2 prosessor from two month and i want to know why WINDOWS 8 assigned thread to this prosessor 16 cor -16 threads
also i want to know if ECC DDRM3 1333 8 GB suitable for this prosessore or i should get 1600 or 1866
I think I can help:
1. Each 6282SE has 8 CPU modules (two 4-module chips.) Each module has 2 threads. So, each chip has 8 modules with 16 threads. The Bulldozer microarchitecture used in the 6282SEs is unlike any previous AMD or Intel CPU and is based on modules that each handle two threads. The performance of a module is somewhere in between Intel's two-thread HyperThreading cores (which are about 10-15% faster on average than running only one thread on the core) and two cores on previous AMD chips (where two cores were right around twice as fast as one core.) Thus the "16-core" 6282 SE is not quite as fast as a 16-core chip made from previous Opteron cores clocked at the same clockspeeds the 6282SE is (AMD actually couldn't do that with the old cores, which is why they made these new ones), but it is much faster than a 16-thread (8-core) Intel HyperThreaded chip. The fact that running two threads on one module decreases performance slightly compared to running two threads on two different modules led AMD and MS to revise how the CPUs are represented to the OS. The "16-core" 6282 SE is thus seen as an "8-core, 16-thread" CPU in order to have each module load up with one thread before assigning more than one thread to any module. It's a hack that was put in place until Windows 8 properly addresses these considerably different CPUs.
2. From what I have heard, DDR3-1600 gives about a 5% performance boost over using DDR3-1333. DDR3-1866 is supposed to work with this CPU but with a bunch of restrictions. There is also no server-grade DDR3-1866 out there yet, so you're really looking at 1333 vs. 1600. If you have a bunch of 1333, use it. If you are buying all new RAM, go with the 1600 stuff as it is about the same price as 1333.
You probably also should get more than 8 GB if you are building a new system. You will want four memory modules per CPU, and 4 GB modules cost little more than 2 GB ones. You will thus want at least 16 GB (four 4 GB modules) per CPU.