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Ok...well here it is...my first AMD/Opeteron overclock. I still need to set up my mobo a bit more I think (so many options). ALso, I didn't want my ram to get in the way but I think I way overdid it, or underdid...whatever. I'm a n00b so let me know what you think im effing up.....
Your memory divider must be set at the very lowest setting - 127.5Mhz!? Try setting the divider to 166 to get the memory up to 200mhz (as long as you have PC3200) and set the HTT multi to 3.0. Keep your CPU's multi and HTT (FSB) the same.Quote:
Originally Posted by foofreaknfighte
Yeah....I shortchanged my memory a LITTLE too much. I have my HTT multi at 4.0 right now...is that ok?
as long as the final ht link speed doesn't get much over 1ghz, it's fine ;)Quote:
Originally Posted by foofreaknfighte
Set it the HTT multi to 3.0, otherwise you run the risk of going over 1000mhz with it. There's no performance hit.
You could leave htt multi on auto with dfi as it auto adjusts. You should probably set you multi at 10 with no divider and see how high the mem will go now.
Burn in seemed to have helped a little, OCCT stable at 3GHz now with just 1.4V watercooled 20C ambient.
http://www.xtremesystems.org/forums/...id=38760&stc=1
Haven't tried with lower voltage yet. :)
Test the memory now? Don't think I should try and go any farther? Also, what are the max temps for these CPU's? So far my temps have maxed out at 36c under load.
most impressive zeus :toast:
though, how long did you run occt?
You can't leave your divider at 127. From what I can tell your ram is only running at 161 mhz. somebody correct me if I'm wrong. Your bandwidth is bupkis at that speed.
36c is fine. You still have plenty of headroom. Crank it up... :banana:Quote:
Originally Posted by foofreaknfighte
Did you get your memory up to default speed yet?
Set the divider at auto or 200 and then the multi at 10. Then go up 10mhz at a time on htt speed until you know how fast your ram can go. Then you'll know what combination of multi/div will give you the most from ram and cpu. You want your cpu as high as possible and ram as high as possible but secondary to the cpu speed. You might want to download this if the math confuses you.
amd memfreq by goddh0r--- http://www.forumdeluxx.de/forum/atta...6&d=1103300738
It's like a calculator for bus speeds dividers and all that.
I ran "test" which takes up half an hour but is very very hard on your system.Quote:
Originally Posted by ozzimark
If it's not stable it will for sure fail in OCCT.
It's about the same as something like 2hours+ Prime95 large FFTs.
Ok. I guess I will do that next. In the meantime I brought it up a little more. I had to bump the Vcore to 4.75 to get it to get through pi though.
4.75Vcore?
I hope you mean 1.475? :p:
Hah! Thank god...
Looking pretty sweet. Your ram is at 208 now so it's officially oc'd too.
Knew I should've got one of those cabye's. Hope mine does as well.
Do the 150's Opterons OC just as well ? That's the only Opterson s939 CPU's one can get a hand of in Norway.
Should I still be testing my ram max with pi?
I'd use memtest but you can use pi. Often a 1m pi will find errors so it's kind of quick and dirty method rather than a whole half hour. Clockgen and pi is a quick way to find a rough ram limit. Emphasis on rough but you'll have to lower your multi or just run 1-1 and lower the bus to start.
Of course, i agree with you, i know about statistical analysis (i'm engineering student) but i like to see A64MaxTCase just as a reference, but not how the plain truth about overclocking.Quote:
Originally Posted by dinos22
Yes, very interesting.Quote:
Originally Posted by gbomb944
My DFI NF4 overvolt very little, actually the value that i set in Bios is almost the real value (0.005V extra). For example, if i set 1.250V in Bios, measuring with DMM i get 1.255 and 1.260 with load (running OCCT, Prime Small FFTs)
Well this is kinda confusing. I know on my p4 system my memory would do FSB 245 but now It wont even boot up past 225. Does that seem strange to anyone else?
What values are you using in MAL and RPT? You can try relaxing those parameters.
I am using 7ns for Max A Latency and 4 for row precharge time. I can get it to pass pi at 2.8v now, buts thats as far as it will go. What should I relax those to? I hope I don't need to get new ram for this Opteron to rock.
Edit: I relaxed those to 9ns and 5. No luck. This is confusing. I wonder if some of my other mem settings need to be tweaked.
Opteron is a very strange animal with MAL (Max Async Latency) and RPT (Read Preamble Time). Maybe you need to use 8ns or 9ns for MAL and 6.5ns or 7ns for Preamble. If don't work maybe use Auto for MAL and 7.5 for Preamble.