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May 22, 2013, 07:41:10 AM
Sudhian > SFF Tech > Shuttle XPC and Legacy Barebones > Crystal CPUID - multiplier adjustment on the fly
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Author Topic: Crystal CPUID - multiplier adjustment on the fly  (Read 2782 times)
bpowell556
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« on: January 18, 2006, 11:54:18 AM »
Opteron power management isn't supported by the Bios Geniuses at shuttle. No surprise there you might say, but wait, there's hope.

Crystal CPUID seems to be able to do this from the desktop - I tweaked successfully down to 4x last night.

Does anyone have the voltage tables for the 165 at each frequency or know where I can get them?

Has anyone tried to boost the multiplier on a locked chip?

Can you get Crystal to mimmick CnQ? i.e. with quick flicks between on and off depending on CPU use?

Cheers!




edit: and what exactly are the risks of coasterisation?
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bpowell556
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« Reply #1 on: January 18, 2006, 11:54:18 AM »
Crystal CPUID - multiplier adjustment on the fly
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mikevalla
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« Reply #2 on: January 18, 2006, 12:37:59 PM »
Yes, CrystalCPU can mimick CnQ, but needs to run in the background to do so.  Just set up the Multiplier Managment, and use the (I can't quite remember, but it should be) /q when starting CCPU from a command line.  It's in the readme provided with the program, so check there to make sure.  BTW, you can't change the multiplier on a locked chip- and yes, I have tried. No changes are applied, in effect.

I'm not sure what you mean by coasterization.  Do you mean what are the chances of frying your CPU?  If so, it's very easy once you start overvolting.  If you take everything in little steps, and check for stability often enough between steps, you should be quite fine.  If you want to reduce your chances of frying even more, however, you should consider undervolting.
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d4n13l
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« Reply #3 on: January 18, 2006, 01:18:04 PM »
CrystalCPUID is working fine with my Opteron 165, 9x276MHz @ 1,35V at load and 4x267MHz @ 0,875V IDLE. I used it also with my old Winchester, it's better than C&Q, because I can set lower voltages.
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bpowell556
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« Reply #4 on: January 19, 2006, 08:01:25 AM »
Originally posted by: d4n13l

CrystalCPUID is working fine with my Opteron 165, 9x276MHz @ 1,35V at load and 4x267MHz @ 0,875V IDLE. I used it also with my old Winchester, it's better than C&Q, because I can set lower voltages.


Cheers for the replies dudes.

Re the overclock on stock volts, that's the sort of performance I'd like to switch on when say ripping or similar. I already know it'll run ok to 2.5 but my ram gets a bit flaky. 2.4 as I remember was solid on stock volts.

How does the multiplier ramp? If it idles at 4x267MHz @ 0,875V then that is really cool. Does it watch the CPU utilisation?

Muchos gracias. I came close to selling this as I have the BOM issue but if I can get this working then I figure I can stomach the odd bios reset. I do it on automatic these days




edit: thanks also re upping the mult. Was considering it with my old winnie 3200, but I guess nada was the most likely outcome - shame, would have liked an FX
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bpowell556
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« Reply #5 on: January 19, 2006, 08:03:04 AM »
coasterisation: to turn into a coaster

Agreed under-volting seems to be a good thing. I tend to stop the overclock when I need to turn the volts up on a cpu...
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bpowell556
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« Reply #6 on: January 19, 2006, 08:05:39 AM »
BTW checked cpu temp with xpc tools using dvd shrink and it was at 38 degrees both cores 100% - sweet! (1.8ghz 1.2v) (ambient 20 degrees)
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bpowell556
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« Reply #7 on: January 19, 2006, 09:34:10 AM »
Here's an example voltage table, would seem to tie in with d4N:

9   1.325   1.250
8   1.250   1.175
7   1.175   1.100
6   1.100   1.025
5   1.025   0.950
4   0.950   0.875


Running a 267 htt - 4800 speeds lol - could some corsair PC4000 take the heat without dropping the mm? or would it need 4400? (250 & 275mhz)...

(dreams on)...
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d4n13l
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« Reply #8 on: January 19, 2006, 02:26:03 PM »
The voltages reported by CPU-Z are 0,832V with 4x 267MHz and 1,296V with 9x 267MHz. I set 50% in the Multiplier Management settings, so I'm sure that the higher clock speed is used also if an application is able to use only one core. For the memory I'm using the 166Mhz divider, so my memory is running at 218MHz.
@bpowell556
Feel free to contact me: ICQ# 106361623 (for a german explanation)
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bpowell556
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« Reply #9 on: January 20, 2006, 08:37:46 AM »
Originally posted by: d4n13l

The voltages reported by CPU-Z are 0,832V with 4x 267MHz and 1,296V with 9x 267MHz. I set 50% in the Multiplier Management settings, so I'm sure that the higher clock speed is used also if an application is able to use only one core. For the memory I'm using the 166Mhz divider, so my memory is running at 218MHz.

@bpowell556

Feel free to contact me: ICQ# 106361623 (for a german explanation)


Cool, I'll give it a go over the weekend I hope
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