Im trying to install a 486 intel overdrive DX2ODPR66 into a GA-5486AL motherboard as the manual for the motherboard says overdrives are supported but the manual here:
http://www.motherboards.org/files/manuals/47/5486al.pdf
says on page 9 and 10:
P) 5V INTEL DX-33 / DX2-66 S-CPU
Q) 5V INTEL P24D / DX2-66 WB S-CPU
Should I use "P" or "Q" and what is "S-CPU"?
Neither, you want P4T. And S is low-power:
http://www.x86-guide.net/en/cpu/Intel-486.html
Intel Overdrive 486DX2-66 (PGA168) P4T 66 MHz 33 MHz 8 KB/-/- ??? Intel Overdrive 486DX2-66 (PGA169) P4T 66 MHz […]
Intel Overdrive 486DX2-66 (PGA168)
P4T
66 MHz
33 MHz
8 KB/-/-
???
Intel Overdrive 486DX2-66 (PGA169)
P4T
66 MHz
33 MHz
8 KB/-/-
???
I have a DX2ODPR (dark brown HeatSink no fan) and it requires 3v or a socket adapter, says 3.0v right near the ODPR marking. On my board I set it to standard Intel DX2-66 S but voltage is set to 3.0 NOT 5.0v. Like "P" in your manual but the voltage JP14 on your board, is set like "M". the other Intel Overdrive 486's have a fan and voltage regulator and are set at 5v.
Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun
Dionb before asking this post I looked up the DX2ODPR66 and mine is version 4.0 and from here:
http://www.cpu-world.com/CPUs/80486u/Intel-DX2ODPR66.html
and here:
http://www.cpu-collection.de/?l0=co&l1=Intel& … 486%20OverDrive
they both say the cpu is 5 volts. P4T is not in the manual setup but P24T is on page 6 as:
J) 5V INTEL P24T 63 WB
K) 5V INTEL P24T 83 WB
Out of the manual selections from "A" to "Q" which one should I use as now im a bit confused, and since this was a replacement CPU where you just had to take out the old one and put the new one in, the wiki on this cpu says it was made to be replaceable so there was no jumper settings to change but I think that was for a 486SX 33.
Anyone know as I'm itching to put this build together
486ODPR66 (P4T) and PODP66 (P24T) are totally different beasts, the one basically a regular DX2-66 with a heatsink and different name, the other a Pentium with onboard voltage regulator and only 32b of the 64b bus connected. Also the ODPR66 has WT cache and the PODP66 has WB cache. So a whole host of jumpers need to be set differently. *Don't* use the P24T settings.
As for what you should use, see your own link:
There is not much difference between an DX2ODPR66 and a standard 486DX2-66
So just use the regular i486DX2-66 settings as with option P, as Horun already stated.
Must say that this is one fancy board - possibly one of the highest-specced 486 boards out there, with some of the simplest, most intuitive jumper settings too - that really deserves a Cx5x86 and EDO, not an ODPR that could run in some old 1993-era thing just as well.
Thank you dionb, I had this board with an am5x86 p75 at 133mhz but this build is for my mt32 as my 450mhz p3 is to fast and I don't have a heat sink and fan for the 5x86 at the moment so later when I get one I will use it.
