D600 BIOS upgrade causes temp. problems.

I've got a Latitude D600 with 1.3Ghz PentiumM, 1024Mb Crucial RAM and a 80Gb 5400rpm hdd, I'm currently running BIOS A06.

I use the laptop primarily for work running Office and VMWare and it's fine, but like most others I also do some gaming. Playing Neverwinter Nights at 800x600 is ok and I waste many an hour fighting evil and doing good deads.

I recently decided to refresh the installation of XP SP1 on my Laptop so I proceeded to download the latest drivers from the Dell site. I also noticed that the BIOS has reached A11 so I downloaded this too. I Ghost'ed my old installation just in case and proceeded to install the new BIOS then rebuild XP with the new drivers.

Everything ran fine until I tried some gaming, after a while (between 10 - 30 minutes) of gaming the framerate dropped massively and became unplayable, upon exiting the game the properties box of my computer reported that the current processor speed was anything between 300 & 600mhz rather than the 1300mhz it's capable of. I also noticed that the bottom of the laptop, by the memory hatch, is REALLY hot, unbearably hot to the touch.

I installed the "Fan Control" program by C Diefer and this reports the CPU temp at about 51C but the RAM temp at 57 - 58C! This program appears unable to control the fan speeds so I have set it in observer mode to monitor temps.

I Ghost'ed this installation of XP, 80gb hdd in a laptop is real useful, and restored my previous XP installation including the old drivers. The problem remained.

I then downgraded the BIOS back to A06 and tried again, now not only is the game running fine for 3 hours+ but the maximum temps reported by "Fan Control" are much lower, around 5C lower for both the CPU and RAM temps.

I noticed in the BIOS notes something about adjusting the thermal reporting algorithyms... you sure your BIOS guys improved things??