@wizard :-
When I inherited the old Compaq tower from my sister - like most non-techies, she upgraded from XP to Win7 by buying a new machine - it originally ran a single-core 3200+. I specifically went for, and tracked down, a dual-core X2 3800+; cache, bus and clock speed were all the same.....I wasn't after performance 'improvements' with regard to running faster (the 3200+ was plenty fast enough), I simply wanted to give Puppy a better ability to multitask with twice as many cores.
(Out of curiosity, I had a quick look to see if there were any 4800+ versions around, this being the fastest the 939 socket would support. They were like hen's teeth; rare as anything, and when one DID show up, invariably the seller was asking a ridiculous price for it. I decided I was quite happy with a "cooking" X2 3800+..!)
I tracked one down for around GBP £7.00 on eBay - in really nice condition, too. To accommodate the new CPU, a BIOS upgrade was required to handle the second core. Forum member Keisha, whom you may remember, helped me to do this under Puppy, using the native Linux "flashrom" utility, instructions for the use of which were sourced from the Arch Linux wiki.....an invaluable source for ALL things Linux-related. (I needed a helping hand, since like all of us I'd heard some right horror stories about BIOS upgrades going wrong and bricking your machine....and this was the first time I'd attempted such a thing under Linux.)
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We had to use the BIOS for an almost identical MSI mobo. The one in the HP was built under licence by MSI for HP; the newest HP BIOS didn't support the dual-core, and as far as MSI were concerned, the '7184' board simply didn't exist! Certainly nothing was available for it. So, Keisha performed some fairly exhaustive research, and discovered that the '7093' board from MSI looked identical, with the sole exception of having 4 SATA ports - the '7184' only had two - and more importantly, had the same CPU socket & used the exact same chipset combo.
So, heart in hand, we proceeded to flash the '7093' BIOS into the '7184' ROM chip. Wonder of wonders, it worked. I had a few interesting hours tracking down a BIOS password, since the 7093's download had been 'locked' (!).....and after a few hours with the fans running flat-out, all was serene again. That old Compaq ran like a champ for the next five years with an alien BIOS.....as far as all the system utilities were concerned, though, the Compaq had a '7093' board ever after.....
You can, if you like, read the whole saga here; it runs to around 13 pages, since Keisha and I were using the thread as a way of keeping in touch during the upgrade 'flash' process..!
https://oldforum.puppylinux.com/viewtop ... =98295#top
Ye anciente Dell lappie got quite a workout that evening, I can tell you!
Mike.