Name: jackbomb Date: September 7, 2007 at 23:18:54 Pacific Subject: Pentium Overdrive Woes OS: Vista and XP CPU/Ram: Various Model/Manufacturer: jackbomb
Comment:
I found a Pentium Overdrive 83MHz processor at the used electronics shop today.
It says on the box that it's designed to give "80486 systems with a 33MHz I/O bus and Type 3 PGA socket" a boost to near-Pentium performance. My 33MHz DX meets those requirements.
But when I put the processor in and turn it on, I get nothing except a really strange sound. Kinda like "AAARRRRRRR!". The noise starts off very loud, and gradually decreases until it can't be heard anymore. It's not even coming from the PC speaker (the PC speaker is disconnected).
I've got the bus speed jumper set to 33MHz, and the other jumper set so that the board will use the socketed CPU rather than the soldered CPU. Is there anything else I have to do? Possibly a BIOS update? All I get now is that very scary noise. It starts up normally when I remove the Overdrive CPU and reset the jumper to use the soldered CPU.
The system is an IBM Value Point 433DX/D. Where's jboy? lol
Super Pentium III: NOW WITH 7950GT AGP! PIII-S cpu overclocked to 1.66GHz--As fast as a 2.5GHz P4! 2GB of PC2700 memory QDI Advance 12T board Audigy 2 Vista Home Premium
JBoy - I believe has given up in frustration.... Though I feel your problem is using the proprietary IBM PC, use a "real AT 486 MoBo and it may be OK!!
aww, that's a shame! He really knew his Old PC stuff.
Indeed, this IBM PC's motherboard does look very non-standard. However, it says right on the socket itself "Intel Overdrive". So this Pentium Overdrive chip should work, shouldn't it?
Super Pentium III: NOW WITH 7950GT AGP! PIII-S cpu overclocked to 1.66GHz--As fast as a 2.5GHz P4! 2GB of PC2700 memory QDI Advance 12T board Audigy 2 Vista Home Premium
I looked at those two articles, and can't seem to grip on why my Pentium Overdrive won't work, lol.
The processor fits in the socket, and "Overdrive Ready" is printed on the socket. Was there more than one version of Socket 3?
I took a look at the BIOS today (with the 486 installed) and it seems that it's already running the latest BIOS.
Super Pentium III: NOW WITH 7950GT AGP! PIII-S cpu overclocked to 1.66GHz--As fast as a 2.5GHz P4! 2GB of PC2700 memory QDI Advance 12T board Audigy 2 Vista Home Premium
yes. The fan doesn't spin, though. I'm not sure if it's because the motor's broken or if the motherboard's not supplying power to it.
I think it's the motherboard, because when it makes that loud "AARRRR" sound, the hard drives and PSU fan also don't spin.
Super Pentium III: NOW WITH 7950GT AGP! PIII-S cpu overclocked to 1.66GHz--As fast as a 2.5GHz P4! 2GB of PC2700 memory QDI Advance 12T board Audigy 2 Vista Home Premium
I found some old "Byte Magazine" archived articles on the Pentium Overdrive 63 and 83. Apparently, if the fan slows down or stops spinning, the CPU will simply reduce the clock to 33MHz or 25MHz; it shouldn't prevent the mobo from POSTing.
Besides, judging from the very loud noise I'm getting, I'm pretty sure the problem's somewhere on the motherboard, and not because the fan won't spin.
Super Pentium III: NOW WITH 7950GT AGP! PIII-S cpu overclocked to 1.66GHz--As fast as a 2.5GHz P4! 2GB of PC2700 memory QDI Advance 12T board Audigy 2 Vista Home Premium
I have a few of these Overdrives. They are great for old 486 systems, if they are compatible. Alot of jumpers have to be changed in order for these CPU to function correctly. Do you have a 3.3V 486DX, or a 5V 486DX? Just because it says "Intel Overdrive ready" does not mean "Intel PENTIUM Overdrive ready". That use to mean the old 4/75 and 4/100 intel 486 overdrive CPU's.
I have a pci 486 motherboard and it requires a special jumper setup pattern totaly different from a 486 setup to even function with a pentium overdrive. BUT! I can get that P-83 overdrive to hit 100Mhz! It's pretty cool! 40mhz X 2.5times I think.
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