This has turned into a bit of an 'overclocking adventure' thread for me and I am not sure if I should start a new one, but I've had some considerable success with this setup over the last few days.
I was playing about with the PCChips
M571 board I mentioned earlier to compare how badly the i430VX system was being bottlenecked running a much slower CPU, with a view to maybe putting the M571 board into the rig instead, even though I hate it for the reasons I mentioned in my previous post.
The multiplier setting details for the M571 revealed some interesting info, the 1.5x multiplier is interpreted as 3.5x with some CPUs and the 2x multiplier is interpreted as 6x with the K6-2. I tried the 1.5x setting on my i430VX board with the Pentium 233MMX cpu an hey presto! 233MHz
I then thought I'd try a spare K6-2 450 I had in there, even though it should not work at all (K6-2 was never supported by intel chipsets) And it works!! at 400MHz!!
Bios reports it as a 486 at 66MHz
but sandra/CPU-Z etc correctly identifies it as a K6-2 @ 400MHz with a 6x multi and with the appropriate speed boost.
Only slight issue is the voltage is a bit high (2.5 vs stock of 2.4) but I've managed to fit a socket A cooler on it, which should provide more than enough cooling. The TDP for it is around the same as it is for the 233MMX, so I'm hoping it won't put too much strain on the boards antiquated PWM circuits. Time will tell.
In other news, my new graphics card for it arrived today.
So more benching tonight.
Only thing I've had no luck with is the USB card I bought for it which refuses to detect anything without a system restart. Plug 'n' Play bios my eye!
I've been keeping an eye on AWE32/AWE64 prices on ebay lately, an AWE32 sold yesterday for £47!
Need to get mine on there, AWE64s can be had for a fraction of that.
I love my classic rig!