Right, is this when I'm supposed to smack myself in the forehead and go "D'oh!" ?
Put the DX2 chip in, and swapped the jumper I assumed was voltage, back to how it was when I got it. Cachechk froze... not a good sign. Speedsys on the other hand, reports L2 cache of 256KB.
Just to try out, I changed the jumper over again, with the DX2, and Speedsys again shows no cache.
Very strange. So that jumper... the only difference between my board when I got it with the DX2 and the single other pic I've found, with a DX4 (i.e. 3.3V part), seemd to have disabled cache.
Anyone got a piece of software that can tell you CPU voltage? 😁
Either this motherboard has been running the DX2 at too low voltage, the motherboard automatically adjust voltage depending on CPU (unlikely) or the DX4 has been happily running at too high voltage.
Just tried Speedsys with the DX4 with the cache jumper enabled. It reports cache naturally, although cachechk still says I've only got L1 cache. 3DBench scored increased by about 33% if my maths serves me right.
I'm just wondering now. Is the DX4 going to take long term damage, assuming it's running at 5V? The heatsink, nor the edge of the cpu sticking outside the heatsink, even gets warm. It's at a comfy room temperature, so overheating seems out of the question.
WinXP : PIII 1.4GHz, 512MB RAM, 73GB SCSI HDD, Matrox Parhelia, SB Audigy 2.
Win98se : K6-3+ 500MHz, 256MB RAM, 80GB HDD, Matrox Millennium G400 MAX, Voodoo 2, SW1000XG.
DOS6.22 : Intel DX4, 64MB RAM, 1.6GB HDD, Diamond Stealth64 DRAM, GUS 1MB, SB16.