Timeline for AMD 24 core server memory bandwidth
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 27, 2012 at 14:02 | comment | added | ntherning | Well, your're probably right. But the nerd in me just can't let this be! :-) If you're not already tired of me please help me explain this: They have now added back the 4GB modules that were taken out before making it 40GB in total again and 5-5. stream again gives poor results. But I just tried to remove the numa=off boot option and after a reboot stream gives me close to the excellent results I saw with 32GB in my last update. | |
| Sep 27, 2012 at 13:33 | comment | added | chx | Because it's extremely unlikely you will be memory bandwidth constrained. You are fretting over the wrong thing. | |
| Sep 27, 2012 at 13:31 | vote | accept | ntherning | ||
| Sep 27, 2012 at 13:31 | comment | added | ntherning | Ok, that's what I feared. I don't understand why they let me buy 40 GB if that's not going to work optimally. :-( Thanks for all help! | |
| Sep 27, 2012 at 13:18 | comment | added | chx | You need four identical modules per channel, end of story. And because it's dual CPU, actually you need eight to get both of them running in quad channel mode. So either 32GB or 64GB. There's no middle ground. | |
| Sep 27, 2012 at 11:40 | comment | added | ntherning | @chx - it seems like you're were right with the single channel mode. Please see my last update. | |
| Sep 26, 2012 at 5:25 | comment | added | ntherning | The hosting company which I rent it from has changed the layout of the modules to slots 1-4-7-10-3 which is what HP says in the manual. No noticeable difference though in my tests. I have now asked them to remove that last 4GB module on each side. | |
| Sep 25, 2012 at 21:42 | comment | added | ewwhite | Good catch on the DIMM population! :) | |
| Sep 25, 2012 at 21:37 | history | answered | chx | CC BY-SA 3.0 |