c37189h@saha.hut.fi (Harri "Haba" Suomalainen) (01/24/91)
In article <1991Jan22.160249.5110@d.cs.okstate.edu> ong@d.cs.okstate.edu (ONG ENG TENG) writes: >Well, a certain Mr. M (thank you) from Finland told me that his friend >successfully sped his 16MHz 286 up to 25MHz with a small fan. Hmm.. I suggested something like that for someone. Can't recall mentioning a fan.. I was talking of 386SX.. Gotta be someone else... >If you are braver, and wanna to go for higher speed, > ..... It sure is worth trying! I saved a lot of $$$ by getting a 16 MHz 387 to my 25 MHz 386 machine. Now I'm thinking of trying to replace the xtal with a 64 MHz to get a 32 MHz machine. You can never have too much power. :-) I guess the 387/16 cannot take double frequency without a fan/heat sink. Gonna try it anyway.. >Could anyone define hot on a chip (that requires heatsink)? I haven't the data on 286/386/387 enclosure nor on the power dissipation of the chips. It should be easy to calculate. (Anyone got this data ?) I had a temperature element taped on my 387 as I tried it. My chip was heated to 50...55 degrees Celcius. I guess the silicon junction is something like 100 C or maybe a bit higher. As these chips usually can take something like 150..200 C, it should do no harm. (It has worked for 8 months now!) When I started testing I decided if enclosure heated to 65 C or more I heat sinked it. Any expert around here ? -hs -- Harri Suomalainen c37189h@saha.hut.fi haba@otax.tky.hut.fi