Dell D-series AC Adapter and E6400?

D series also have this "intelligence".

 

Side topic: Are you using Vista 64bit by any chance? RMClock is finicky on mine, and CPUz says that it lies. I've looked around the net for getting it to work, but it appears that RMClock is a dead project. Know of any alternatives?

 

CPU-z newer than about 1.42 and RMClock disagree on voltages. However, there is strong evidence that RMClock works since the full load temperatures go down. However, it's not a big difference this time around. RMClock's main job is over-riding Dell's clock throtting when using the 65W PSU.

I'm using 32 bit XP Pro. I used Vista for a year and decided to treat myself to fewer compatibility problems this time around. You need the right driver for RMClock and 64-bit Vista. The link should be in the undervolting guide.

John

 

Thank you so very much! I've been fighting with RMClock to get it to work on 64 bit for a while now. One interesting thing: I can set all my voltages down to the lowest setting and run stressing software without a softlock (freeze). Is that normal?

Now to find my D adapter and see what happens.

EDIT: 2.7 Wh charge rate...estimated time from 66% charged is 10 hours...

 

Does that mean you needed the signed driver, which you now have?

Check the monitoring screen of RMClock to make sure that it is running at that low voltage (what voltage is that?). If it is, then I'm jealous: My P8600 crashes at 1.025V (RMClock voltage) at full speed. The 6x voltage is 0.925V.

Slightly more than mine - i get around 2.4W. I once it promising 24 hours to charge. However, you will find that the charge rate goes up to the normal ~40W when the computer is off.

John

 

RMClock and CPUz conflict with information. I checked Intel's site and discovered RMClock is wrong while CPUz is correct on voltages. I'll show both, incase yours is wrong also:

Intel lists the op voltage of this CPU as 1.063v to 1.263v. CPUz confirms this. RMClock lists the op voltages as 0.95 to 1.15. The different is ~0.11v.

All the settings in RMClock are set to 0.95v. The monitor tab confirms that the voltage is at 0.95v. Furthermore, CPU shows 1.063v, which I trust. I did a stress test for about 20 minutes on both cores at 2.4ghz (2.53 is a half-multi, which RMClock doesn't support) without a glitch. The lowest multi was 6x SLFM, which was already set at 0.95v. On transitions between states, the voltage jumps to 1.0v (RMClock), but then returns to 0.95v.

In reality, this isn't much of a savings, only 0.2v. It does mean that I can run the CPU wide open without using as much battery, but the low end can't be undervolted any more. I'm not sure if this is a limitation of RMClock or the BIOS/Motherboard. Is there any documentation on setting the CPU voltages from windows? I looked at using nTune (in addition to underclocking the GPU) to lower the voltage, but it crashes when trying to load the control panel. If it isn't too difficult, I may try writing a little C++ program that just handles the cpu voltage.

EDIT: I needed a signed driver for RMClock. I tried using different ways of installing it, but they were all hacks. Thanks for the link!

 

The E-series to D-series power compatibility was mentioned on one of Dell's releases, engadget maybe? The 65W from the old I8600s will not charge quickly if at all, but the higher wattage 90 and 135 from other models will.

I posted on dell's ideastorm to offer an upgrade option from the 90W to 135W, but it hasn't appeared on the configuration page yet.

Geoff