what runs hotter k62 or cyrix MII

[rnimz]

ok heres the deal I have this old motherboard that was running a cyrix MII 300 and after 2 days of bios flashes it is finally running a k62 500 at 500, this machine is always on performing some sort of task, I am just wondering if a k62 500 runs much hotter than the crappy cyrix, or is it the other way around. The chip has a decent heatsink/fan on it and a case fan blowing on it, so I souldn't be to worried, just wondering I guess. Thanks.

 

I went from a MII 333 (250MHz) to a K6-2 500MHz and the Cyrix was hotter. They're both hot compared to what's on the market now, but they're made to run that hot, so big deal. Not like you can O/C either worth anything.

A 486 DX2 could run without a fan on its tiny little heatsink and run HOTTTTTTT. Like burn your finger hot. And they're still around today.

They can take the heat. I think Tom's or somebody a K6-2 kill test and had to run it at 70 Celsius to destroy the core. I think he put a peltier on it backwards to do that. So unless you're under extreme conditions, don't worry about it

 

[rnimz]

cool thanks, though it looks like I may have asked premature, I am having hugh stabilty issues, like it sometimes boots into windows, and something is always screwy, looks like it just ain't gunna work in this board.

 

[Peter]

Some electrical data to start with (maximum power drawn in Ampères, maximum heat dissipation in Watts):

MII-300 (225/75 rev. 08h): 8.58 Amperes, 24.9 Watts.
MII-300 (225/75 rev. 14h): 7.48 Amperes, 20.7 Watts.

MII-300 (233/66 rev. 08h): 8.80 Amperes, 25.5 Watts.
MII-300 (233/66 rev. 14h): 7.74 Amperes, 21.6 Watts.

K6-2/500: 12.5 Amperes, 20.25 Watts.

(MII at 2.9V, K6-2/500 at 2.2V)

Now what does that mean? The fan/heatsink now has slightly less work to do, but the mainboard's CPU voltage regulators have to feed a much more demanding beast. This is an excellent source for reliability problems.

Regards, Peter

 

[Fish54]

Yeah, that K6-2 is going to be drawing a bit more current, so it may be benificial for you to increase the voltage a bit to attain more stability. Good luck
-Fish