Originally posted by: hiroy2020
We currently have two servers that have AMD Opteron processors.
The older one has AMD:
Opteron 2384 C2 2.7 GHz 4x 512 KB 6 MB 1 GHz 13.5x 1.35 75 W 115 W Socket F
The newer one has AMD:
Opteron 6172 D1 12 2.1 GHz 12x 512 KB 2x 6 MB 3.2 GHz 10.5x 1.1875 80 W 115 W Socket G34
And the next one that may be purchased TBD/TBP is AMD:
Opteron 6282 SE B2 16 2.6 GHz 3.0 GHz 3.3 GHz 8 × 2 MB 2 × 8 MB 3.2 GHz 13-17.5× 105 W 140 W Socket G34
My question is for the older vs. newer one because the GHz is lower on the newer at 2.1 vs. 2.7 that there is some question regarding performence.
There is a question to whether or not the older AMD is much faster in processing and performence than the newer one which has lower GHz and as well the one yet to be purchased with it only 2.6 GHz vs. 2.7 older but faster than the 2.1 GHz newer server.
To satistify the questions from users and developers can someone explain this to be true or point to a document or location that does?
Any help is appreciated = Thanks...
The Opteron 2384 and 6172 are fairly similar, they differ mainly in numer of cores, the amount of RAM they can support, and clock speed. They are essentially equal in performance per core and per GHz. The 2384 has higher per-core performance than the 6172 because the 2384's cores are clocked at 2.7 GHz rather than 2.1 GHz. However, you can probably only run 8-10 VMs on the dual 2384 server before it starts to get bogged down because two 2384s only have 8 cores between them. You can run a couple dozen VMs on a dual 6172 server because two 6127s have 24 cores. Each VM will have a little less performance than a VM on the 2384s, but you can run a ton more of them on the 6172 server because you have a lot more cores.
As far as the 6282 SEs, the 6282 SEs are a completely different animal than the 2384/6174s and their performance depends a lot on the particular loading and workload. The 2384 cannot run any faster than 2.70 GHz no matter what, and the 6174 maxes out at 2.1 GHz. The 6282 SE is rated at 2.6 GHz but can increase its clock speed to 3.0-3.3 GHz depending on how much it is being stressed. Granted 3.0 GHz on a 6282 is more like 2.7 GHz on a 2384/6172 because the 6200s are a little slower per clock, but you get the point. If you have only 1-4 VMs stressing the CPU, the 6282 SE can run at 3.3 GHz and will give those VMs more performance than any of the other CPUs could. If all VMs are heavily loaded, you'll get the 6282 SEs to run at 2.6-3.0 GHz depending on cooling. Performance will overall be better than a 6174 and per-VM performance will be roughly on par with the 2384s, just that you can handle a lot more of them than you can handle with the 2384s.