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You can change the NB multi in the pci register F3xD4 bits 4:0 (see pg 240 BKDG) after you changed those bits with baredit you must reboot before the value applies.Quote:
Originally Posted by Particle
http://www.abload.de/img/beditycqm.jpg
http://www.tweakers.fr/baredit.html
Can you be a little more specific on how to tell where to edit?
Exactly the last five bits as shown in above screenshot. I tested that yesterday with an Athlon XII here changed the last three bits from 110 to 100 rebooted and had an NB speed of 1600MHz instead of 2000MHz.Quote:
Originally Posted by Particle
With the new baredit version you must select "Configuration Space" in the first drop down, "Bus 0, Dev 24, Fct 3" in the second one and 32bit in the third one.
Then select row "D0" column "04" and last five bits should be 00111 change em to 00110 for 2GHz or 00101 for 1.8GHz or 00100 for 1.6GHz. Click write and reboot.
Excellent! Just regular big endian then. :up: I'll try this when I get home. Sorry for dragging this out, but as I've not been into the raw side of my computer before I didn't want to risk changing the wrong bits. My guess is that I'd just crash, but who knows? Maybe I'd flip the bool bit from 0 to 1 for the self destruct device? :D That would be just my luck.Quote:
Originally Posted by justapost
NP, I think you'll have to change it for both chips. The other one should be accessible via B0 D25 F3.Quote:
Originally Posted by Particle
NB FID seems to take effect without a reboot. (I rebooted anyway but couldn't tell a difference in benchmarks between 1600 and 2200 MHz.) No appreciable difference in overclocking. Thanks for the help though, justapost. Looks like I'm in need of some vcore.
Particle: "I have a fever and the only prescription is more vcore"
Get the circuit diagram for your mobo and get to volt modding! I think we have an entire forum for that here at XS :D.
More RAM is on the way! Single rank stuff this time...costs more, but it's all about getting the best (or: Newegg quit selling the cheaper stuff so this was my only choice. You decide. ;) )
Gom, sorry it took so long to do your request:
wPrime 1024M
http://www.pcrpg.org/pics/computer/o...wprime1024.png
why so i see 1.504v, did you get to overvolt it?
I think CpuZ is not showing the vcore correctly.
It doesn't. We're still at default vCore (1.225V).
any news?
Well if you are all up and running now, could you run some benches on this program and post your scores?
http://www.xtremesystems.org/forums/...d.php?t=221773
See how you compare to those high speed (some dual socket setups) Intel CPUs...
I'd really love to see that bench run too!Quote:
Originally Posted by EniGmA1987
+1 :up:Quote:
Originally Posted by Mechromancer
PPD for Folding would be nice as well. Specifically under Linux because the client is running the new A2 core which can handle more threads than Window's A1 based client.
After last night, I'm pretty well convinced that what is holding me back is the motherboard itself. Reminds me of the old days when overclocking HTT was tough because the boards just couldn't go that far.
HTT multi down from 5x to 4x.
CPU multi down from 11x to 9x.
NB multi down from 11x to 8x.
NB voltage up from 1.175 to 1.225V.
CPU voltage stock at 1.225V.
RAM timings at maximum board supports, DDR2-400 (physical memory is DDR2-800 spec).
PowerNow off.
I crash randomly when HTT is in the 230 range even when the above settings are active. Sample speeds versus stock at crash:
HT Ref: 235 [200]
HT Link: 940 [1000]
CPU: 2115 [2200]
NB: 1880 [2200]
RAM: DDR2-470 @ timings more relaxed than spec for DDR2-800.
The only thing overclocked at this point is the HT reference clock itself, and it's still crashing. As such, I don't think vcore is going to save me. I've got a fever, and the only cure is not just more vcore but a new RS800 motherboard this fall. It's too bad I can't just blow and trace bridges these days on the CPUs to get the multiplier I'm after. I wonder if it's possible to do a pin mod.
Of course its the Motherboard:) After all its a server motherboard and the Bios are locked for overclocking features and its not supposed to be overclocked at all:p:
Talk to Movieman he can help you overclock that thing I think he uses Systool that was developed by Wizard.
Also go to 2CPU Forum you can find out much about overclocking server boards on that forum.
Oh, I think I wasn't clear. I mean I think the board is physically incapable of generating an HT reference clock exceeding about 230 MHz with stability. It won't matter what software I use to attempt it. As for 2CPU, I don't think they're interested. My "planning a dual istanbul" thread over there went over like a lead balloon. No posts after two weeks.
You've got me wondering... I actually considered bringing out the multimeter, before I realised I wasn't really up to testing 1456849 combinations on at least 2 processors :rolleyes:Quote:
Originally Posted by Particle
Bet there's some help to narrow it down in the tech docs from AMD though..
if he tells amd he plans to have the fastest 2P system in the world, they might just send him unlocked CPUs
Hehe--good idea.
http://support.amd.com/us/Processor_TechDocs/31412.pdf
Look at page 22, karbon!
Is it possible to increase the chipset voltage? Maybe some water cooling and more voltage will do the trick. Chances are you've already gone down this obvious path so this post is probably in vain.
PS: Please give y-cruncher a try and let us know your scores. All us geeks want to know.
Y-Cruncher x64 SSE3:
12 x 2508 MHz
1M: 1.061s
2M: 1.761s
4M: 2.981s
8M: 5.184s
16M: 9.278s
32M: 16.710s
64M: 33.620s
My times hardly look competitive with anything.
Edit: Looks like y-cruncher doesn't hit all cores very well. It's often only using 40-60% CPU time.
hmm, disappointing :(
Wonder what is wrong with it that the program isn't hitting all 12 cores