6625 CPU operates on very low voltage

I've been tweaking and testing with the new RmClock, and I've managed to push down the voltages to this:

6.0x = 0.8500V
7.0x = 0.8875V
8.0x = 0.9125V
9.0x = 0.9500V
10x = 0.9750V
11x = 1.012V <- 23% OFF from original V!!!

And it's stable

I might go even further down, but that seems crazy... don't wanna test anymore today, i'll do that another day

 

sounds good, just means you have a pretty good cpu
won't hurt to have less heat too

 

Your first post, welcome

Yeah, I'm really surprised. It idles around 44-50 degrees celsius now, and maxing out at 77-80, but not very often it reaches those temps.

 

i've been stalking zepto notebooks secretly hoping for a 8800 notebook, guess it'll be out for new years rather than xmas...

 

Yeah around spring maybe, unfortunately. I think it will take a long time before it becomes mainstream. Right now it's only special manufacturers that are offering pre-sales/reservations.

But back to topic; I left the window open here in cold Denmark, and now min. temp dropped to 40

Gaahh, guess I reached the barrier, I dont think I will be able to undervolt more, if so, i'll post

 

I haven't gotten very far with testing, but here's my initial
set of numbers for my 6625wd (specs below).

6.0x = 1.025V
7.0x = 1.037V
8.0x = 1.050V
9.0x = 1.062V
10x = 1.075V
11x = 1.087V
12x = 1.100V

12x tested under stress for 41 minutes.
System stable for 1 hour (will update)
Will continue to drop #s when time to test.

Hope this helps!

 

My 11.0x is lower than your 6.0x, COME ON

 

have you done some sort of stress test? superpi wprime etc etc?

 

Each CPU is different and some undervolt better than others. You are very lucky. I am jealous but that won't make my CPU even offer to go below 0.9V.

John

 

Am starting the 2nd round of tests today, lowering a little
as I go so hopefully my numbers will start to look a little
better soon... (knocking on wood)...

2nd UPDATE: 2nd set of numbers, after 41 minutes of testing
using "Orthos."
ISSUE: RM CPU Clock utility didn't save settings, now seems
to have resolved itself.

6.0x = 1.987V
7.0x = 1.000V
8.0x = 1.012V
9.0x = 1.025V
10x = 1.037V
11x = 1.050V
12x = 1.062V

TEMP BEFORE UNDERVOLT AT MAX CPU: 89.9
TEMP WITH CURRENT VOLTS AT MAX CPU: 85.0
RESTING TEMP WITH CURRENT VOLTS: 45-48

 

Well you have 200MHz extra, maybe that's why you need more volt, possibly! But I still think you can lower 7.8.9x

 

Yeah, I'm sure you're right, but it's all I've had time for today to test...
hopefully I'll have more numbers in the next day or two.

 

Are you using the new BIOS (011) ? If so, the temperature drop you experience, do you see any positive effect on fan usage, now you've lowered the Volt?

I'm still using 008, and therefore I don't have SLFM or IDA

 

Using the newest bios, haven't noticed any effect on fan but probably
for 2 reasons. (1) I've not undervolted enough yet and (2) I've been
working on computer hard all day so cpu use has been high.

I hope to have more feedback and numbers soon, but wanted to post
something now for anyone else who might be thinking of doing the same.

More soon....

 

Talking bout low temperatures, i bet you can beat mine (the lowest temp I got was 20C but i didnt have rivatuner running at that moment

My current volts are:
0 SLFM 6.0x 0.8500V
1 Normal 6.0x 0.8500V
2 Normal 7.0x 0.9000V
3 Normal 8.0x 0.9500V
4 Normal 9.0x 1.0000V
5 IDA 10.0x 1.2750V (only option)

 

Can I find a howto to show me how to undervolt my processor on my 6625wd (t7700)? I'm really intrested in this but I have no experience with it... Or if you guys could give me some guidelines...

Thank you!

 

How come your HDD temp is as low as 10 ??? :O Last time I checked NHC my temp was 45-50!

Also, is RivaTuner capable of undervolting GPU?

 

rivatuner can only underclock the card, I dont think its even possible to undervolt the GPU, but Im no expert on GPUs

and my hdd was that cold becos the room (or in fact house) was about 10C when I started the lappy, so I had a hard time manouvering the mouse and typing

click http://forum.notebookreview.com/showthread.php?p=2637648#post2637648 for a undervolting sbs

 

It seems that I already hit the wall with my previous numbers (for 12x @ 1.062V). I start to run into errors any lower.

Having figured the top end, does anyone have suggestions for the bottom
end (6x, 7x, etc...)?

 

I would expect that the 6x to 8x will run at the lowest voltage you can get to. I did some short stress tests yesterday on my T7300 with 0.90V for 6x to 8x and hit no errors during those tests. However, beta 2 has given me 5 BSODs (in normal use, not stress testing) so I am now running beta 1 again.

John

 

Cheers, will test it over next 48 hours, thanks!

 

Weird! I've had no BSODs at all with it!

 

I'm sorry for the n00b-question but where can I find
the voltages in RMClock? I can't find it anywhere so.. :-s

 

Profiles main page

 

After some more tests it was apparent I wasn't going to get
better numbers. So I decided to remove the program and
give NHC Laptop Control a go again (used it on old Znote 4200).

I've noticed something I can't explain, when using the monitor,
it shows my CPU Clock at around 2400 but never below.

UPDATE: Looks like I jumped the gun, found in another thread
the current version of NHC has this issue in Vista. Woops!

Windows Vista power plan is set to balanced so shouldn't the
clock cycle down after little or no use?

Thoughts welcome!

 

NHC is not yet Santa Rosa compatible

 

Wow using the new version of RMclock and 600mhz at 0,9v setting my CPU runs at 42c when the internal fan is completely shut off! Only my zalman notebook cooler is needed to cool the whole laptop!

 

Looks like a cooler actually cools the lappy quite much, maby I should get one, my idling temps at 600MHz and 0.850V is still needing the fan (or very light usage: browsing), temps climb very slowly from 51C to 58C.

Using vista

 

0.850V ?!?! damn... i just updated my bios on my 6324w and atm im running 1.125 i think. my old 6214w runs at 1.050. but now after updating my bios i get lower options aswell on my 6324w, so i think ill test it out too

 

remeber to check that RMClock recognises your processor as mobile, not desktop

 

Yeah, sometimes it doesn't detect whether its mobile or desktop.

 

What difference does it do ?! Min runs great at 1.0875V now, detected as desktop though...

 

If you select mobile you can set the V even lower.
You should be able to change to at least 1.012V, that's what I have set my max. V to, and I have 2.2GHz. Your CPU is 2.0, so you should be able to undervolt even more !

 

your right.. right now im running at 0.9750V at 10x and its lovely ill test a bit more and see where it dies.

 

Well you can test as much as you want, it's not dangerous. If you set the V too low it will hang, and you'll have to restart, that's it No explosions or busted cpus

 

Heh i was too fast... 0.9750V wasnt all stable... but im running 1.000V right now, seems to be fine.

 

I'm running 0.975V at 10x, but thats on "performance on demand" so it never stays on that V for a very long time, and therefore wont hang, even if V is too low

My max (11.0x) is 1.012V though, and that's stable

 

Normal states on my 1.83 T7100:
6.0x 0.8500V
7.0x 0.8875V
8.0x 0.9250V
9.0x 0.9875V (highest multiplier)

Tested with a few hour of gaming, so its stable to me. Gaming temps now at 78-80C. Thats 10C lower than with normal volts.

 

I've just had 2 BSODs in FEAR, so now I know for sure that my Vs aren't stable. Damnit I thought I had a golden cpu with superb undervolting abilities, I was wrong!

 

Proper stability tests involve fully loading both cores (eg 2 separate instances of the Prime95 torture test), running for several hours and then using a voltage a couple of steps above whatever is the limit. You can select a single speed index in the RMClock profile and do a torture test at that speed.

However, I am concerned that there are some speed / state switching bugs since I have had BSODs when the CPU is not heavy loaded.

John

 

I havent had ANY crashes caused by low voltages, and Iv just moved the voltages around a bit, then testing with gaming xD

 

Check this out. With the Vista SP1 installed, which reduces unnecesarry CPU usage, I can now manage to hit 40c on "power saving"

 

Vista SP1??? Is it out?? How come I havent got any notifies bout this

 

Oh, sorry, I mean SP1 RC1 ? But it's only ONE step before the final release, and it's pretty stable. Check out the OS forum, there's a thread on it with links

 

Like wtf? SP1 RC1????

Ur talking bout RMClock, yes?

type out the full name pls

 

No no Service Pack 1, Release Candidate
It's almost as good as the final product, just need final bug fixes, nothing else

Here's the thread

 

Just installed the new BIOS. According to RmClock my temp is much higher, it never goes below 50, which I could easily reach with BIOS 008.
EVEN at SLFM, I don't get below 50. How come @ 1195MHz Idle at 43-44c, and 798MHz idle at 56c ?

I dont get it???

Something is SERIOUSLY wrong with BIOS-011.

Once again, I'm rolling back to 008 !

 

Rly? I think Ill install the 008 if thats the case (as I jumped sraight from using 004 to 011 )

 

Forgive the ignorance,

What do I lose if I roll back to 008 from 011?
Also, it seems like a new version should come
out in the next 2-4 weeks, so would it be
prudent to just wait?

Thoughts welcome!

 

You'll lose SLFM (Super Low Frequency Mode), so you won't able to clock down to 800MHz, only about 1200MHz.
You'll also lose IDA (Intel Dynamic Acceleration), the acceleration of one core. In your case from 2.40 -> 2.60 GHz
But that IDA doesn't work very well, because the other core never really is idle.
Maybe with the new bios, it'll work. Rene said that they're going to fix some latency issues, which will lower the min. CPU usage

IDA: