Undervolting Acer Aspire 1810TZ

Hi, Im a newcomer to both laptops and this forum. I found your ultimate 1410/1810 thread and I was redirected to these two threads:

Undervolting guide and 1810T undervolting guide

I managed to get up the profile for the RMClock but somehow the program showed me only one mutliplier, 6X. The CPU ran at 0.9V, but at 1,2GHz, while it should do 1,3GHz under load. I uninstalled the program and the CPU ran at 1,3GHz once again. I cant seem to find out where to get the second 6,5X multiplier so I was hoping if you could help me out here

Thank you in advance.

 

RM Clock does not correctly support the newer 45nm CPUs with their half multipliers. You will need to edit the registry to get RMC to use a 6.5 multiplier.

Here are some details:

http://forum.notebookreview.com/6130270-post4855.html

Post a screen shot of the registry if you need some help.

What CPU model do you have so I can add support to ThrottleStop for your CPU? Hardly any Intel CPUs can use a 6.5 multiplier. SU9300 perhaps?

 

My processor is SU4100. And Im not really sure what this throttlestop means in this situation, could you explain

Here are pics from CPU-Z:



Oh, and thank you

Edit:

I just realized that if I did that, I would lose my powersaving clocks AKA 1,2GHz at 6X multiplier. However I tried messing with the registry markings but didnt get it to work. Heres a pic from RMClock and regedit:

 

We've got a problem here.

RM Clock does not correctly support 45nm CPUs with their 0.5 half multipliers. Because of this, it only gives you the choice of one VID/FID setting so my RM Clock half multiplier fix won't work for you.

ThrottleStop is a similar program that can be used to adjust your VID/FID. For your CPU, it should work better for you than RMC.

The only problem is that at the moment, ThrottleStop does not support the 6.5 multiplier. I left that one out since most CPUs can't use it. I'll go add that feature to ThrottleStop for your CPU and post a version that you can try.

Here are the Intel specs for a SU4100:
http://processorfinder.intel.com/details.aspx?sSpec=SLGS4

 

Thank you very much. Where will I be able to download this fixed ThrottleStop?

Edit: Oh.. Should have read it more carefully. Thanks

 

ThrottleStop 2.00 Build 20
http://www.fileden.com/files/2008/3/3/1794507/ThrottleStop.zip

I added support for the 6.5 multiplier to this version. When this is selected on a CPU that does not support 6.5, it will ignore this request and use the 6.0 multiplier instead.

It should work correctly on the SU4100 so let me know how it works for you.

ThrottleStop works differently than RMClock but should let you accomplish the same thing. Set the appropriate voltage for the 6.5 multiplier and then select the Power Saver option so it can use the minimum voltage and 6.0 multiplier when idle. I'm not sure if SLFM (Super Low Frequency Mode) is supported on your CPU. It doesn't look like it.

You can also enable the C States option to try and save some power. On a 10 watt processor, saving half a watt would be big.

 

It drops to 6X and 0,9V while idle and at full load it jumps up to 6,5X and 1,1V. I dont know about SLFM. Gonna try the program now. Will post up results.

Edit: Works like a charm, big thanks to you buddy. I really appreciate this. Going to run few rounds of LinX to see if it is stable at 0.9V

 

Just make sure that the Control Panel -> Power Options -> Minimum processor state is set to 100%. This will allow ThrottleStop to control your multi without having to fight with the OS. When TS is minimized to the system tray, it is very efficient and won't put any significant load on your CPU.

Is the SLFM option grayed out? My code to determine if a CPU supports SLFM isn't great so if this option is grayed out then I'll send you a version that lets you adjust this to see if it does anything. I'll also try to look through the documentation to see what I can find out about an SU4100. The Intel documentation leaves out a few details on some CPUs.

Edit: The Intel docs show that the SU3300 and SU3500 both support SLFM. They are rated at 1.2 GHz and 1.4 GHz. They have a couple of engineering sample CPUs listed at 1.3 GHz but they don't show SLFM support. The SU4100 is not in the docs I've found so far. They have docs for the newer 5000 series Pentium chips and the SU3000 series but nothing for the SU4000. Typical.

 

It isnt greyed out. Also, should I use the Clock Modulation and Chipset Mod options in TS? It ran 20 rounds of LinX with problem size over 10000 without problems with 0.9V This is great.

 

Clock Modulation can slow your CPU down but at idle it doesn't save any power. It actually increases power consumption so I'd avoid it. Some Dell laptops have been secretly using / misusing this "feature" to control power consumption at full load which really kills performance, especially when the bios forgets to turn it off for 5 or 10 minutes. I'd keep those locked at 100.0%.

If your laptop doesn't use these evil slow down features then there's no need to have them checked.

I couldn't find any official documentation about the SU4100 but one user in a forum said that the SU4100 does not support SLFM mode. Maybe monitor with CPU-Z and see if enabling SLFM changes the reported MHz or VID voltage. Minimize TS to the system tray after adjusting SLFM when testing and have it just in monitoring mode. It probably won't make any difference so you can leave SLFM disabled. If your CPU does support SLFM then you should see the VID drop another notch in CPU-Z at idle as well as the MHz.

That would be nice but there's nothing wrong with LinX stable at 0.9V.

 

The SLFM doesnt work, but its ok for me. Also SU4100 doesnt support anything below 0,9V and it ran at 1,1V. 0,2V makes all the difference at least on desktop computers. But thank you once again for editing that program so I got extra battery life and cooler laptop And for all the useful info you gave me.