A really really quick undervolting question (or two)

Hi all!

I'm not really very active in the forums (but I plan to be once I get my new lappie, not only asking questions ) and I've been reading through a lot of things. One thing I came across is "undervolting", both flipfire's and the one from here.

Both use the tool RMclock, and I have two questions regarding this process:

1. If I set a "minimal" state and a "maximal" state i.e. 6x and 10x (only for example), would I have to manually choose which to use or does the program automatically switch depending on the loads? If it automatically does, do I have to set increments for everything in between (7x, 8x, 9x) so that they'd all be undervolted at those speeds?

2. I've heard about Intel's SpeedStep, in that it automatically throttles CPU clock to suit the demand of the computer. Would using RMclock and undervolting somewhat disable this function or something?

As I've said it'll only be quick, so thanks to the people here, I hope I put this in the proper thread.

Jb.

 

1. If I set a "minimal" state and a "maximal" state i.e. 6x and 10x (only for example), would I have to manually choose which to use or does the program automatically switch depending on the loads? If it automatically does, do I have to set increments for everything in between (7x, 8x, 9x) so that they'd all be undervolted at those speeds?


I believe you need to set the voltage for every multiplier, certainly if you want the optimum voltage setting you will.


2. I've heard about Intel's SpeedStep, in that it automatically throttles CPU clock to suit the demand of the computer. Would using RMclock and undervolting somewhat disable this function or something?

No.

 

I think RMClock only supports full digit multipliers (e.g. 9x, 10x) while some Intel CPU's have half digit multipliers (e.g. 9x, 9.5x 10x 10.5x). So if you use RMClock you will lose the half digit, which should only amout to 200Mhz or so.

Other than that it doesn't hinder SpeedStep's performance in any way.

 

1) Some people actually say it's better to use just the minimal state and maximal state and scrap everything in between. I forget the exact reasoning behind this, but in the end I don't think it makes a huge difference. Personally I use every state.

2) The relationship between SpeedStep and RMClock is that SpeedStep lowers the clock speed your processor by adjusting the multiplier and RMClock allows you adjust the voltage at every one of those clock speeds. So the two really go hand in hand.

 

Thanks for everyone who repped.

Now I have a real undervolting question.

I'm currently trying to undervolt my laptop, a Lenovo 3000 N100 with a C2D T5200 processor, runs at 1.60Ghz. Now I'm trying to follow verbatim flipfire's guide, but waaaait! When I try to first do a stress test with the default settings, the computer restarts. I tried to skip that first process altogether (got an 82C temp before it restarted) but when I tried to deduct 0.100v from the highest multiplier (12x, all the while following the guide exactly), it would be stable under the stress test for about 5 minutes (about 81C here, though I think this is too little an improvement) and then it restarts again!

What am I doing wrong? Oooh. The good thing is, when I use the default voltages (the lowest multiplier having I think 0.950v), my idle temp goes down from about 55C to 45C, but when I commence the stress test, with my 12x multiplier at about 1.0750v, (0.100v less than the default) the laptop restarts. Is my processor not capable of undervolting? Again, thanks to everyone.