Pentium 3's didnt really make a huge amount of heat to warrant exotic cooling.

that said, these are my secret favorites: https://www.alphanovatech.com/en/cat_pfe.html#spec_pal

luckybob wrote on 2020-12-29, 01:45:

Pentium 3's didnt really make a huge amount of heat to warrant exotic cooling.

that said, these are my secret favorites: https://www.alphanovatech.com/en/cat_pfe.html#spec_pal

Thanks for this heatsink suggestion! I'll take note of these coolers. Do you know of any heatsink with a screw attachment clip? It's been long since i don't build a P III/P IV rig, and i remember that with these heatsinks i used to do some pressure in order to install it.

The screw attachment method was for certain socket A/462 and pentium 4's.

Afaik, no pentium 3 used a screw method

You will need a SECC2 heatsink+fan such as this one.
I have a very similar one on my Pentium 3 1 GHz CPUs and it works fine. As someone mentioned in an earlier post, Pentium 3 CPUs don't really require any special, exotic cooling.

OP mentioned the "CMV12" heatsink, and that looked like a socket 370/462 heatsink. not a slot-1.

True, just saw that it's a socket 370 motherboard. Scratch my previous post 😀

Yes, sorry i should have clarified that i do have a socket 370 setup in mind with the d815eea motherboard. I'll have the first post edited.

Regarding my current options i currently have the CVM 12 but i think it's the fan name actually, and along with the heatsing the model i do have is the Cooler Master DP5-6I31D-01

and the other one is the stock intel a28837.

I'll check out the heatsink and fan from https://www.alphanovatech.com/en/c_pale.html as the ones i have are actually pretty old by now. Also these fans and the motherboard actually was given by a neighbour who didn't want these parts anymore. I'll probably do a log of this build in another topic.

I mean, the one you pictured will work great. You can just replace that fan with anything you want.

In fact, i'm like 95% sure I have one of those exact coolers.

I would get a fan speed controller along with it so you can adjust the speed of the fan to quiet it.
Most fans speed at full speed and are loud. You don’t need the fan to spin at full speed to cool the CPU.
Also check the temp with a temp-gun.
Check you recommended CPU temp on “CPU world.com”.

Be careful when mounting larger heatsinks if you're using a Coppermine without a heatspreader.

A lot of later heatsinks that also advertise Socket A compatibility can be pretty tight and put a lot of force on the CPU die. Since Pentium IIIs don't have pads in the corners like Socket A chips do, it's very easy for the heatsink to tip slightly when mounting which can crack the corners off of the die pretty easily. Doesn't happen all the time, but it's something to watch out for.

Ozzuneoj wrote on 2020-12-30, 20:44:

Be careful when mounting larger heatsinks if you're using a Coppermine without a heatspreader.

Sometimes I play with the idea of getting some common trash bottom shelf Tualatin Celeron, maybe a dead one, removing the heat spreader and putting it on a Coppermine.
Or maybe even a P4 or a Core2 heat spreader if the thickness allows for it. There are a lot of Celeron Ds in office PCs and the only use for them is to make hit piece videos and articles about how trash they were.

Would that work? I think there were some Coppermines manufactured with heat spreader.

Not a bad idea, but it would depend on the height of the chip under the heat spreader. I know a p3 doesn't put out a ton of heat compared to later chips, but heat spreader contact (and the TIM used) has proven to be a pretty big deal over the past 10 years or so.

If you can easily delid a bunch of newer chips that no one cares about, I think it'd be worth experimenting with.
You'd want to test it using a motherboard that can (accurately) read your CPU's thermal sensor as well, because not all can.

Ozzuneoj wrote on 2020-12-30, 20:44:

Be careful when mounting larger heatsinks if you're using a Coppermine without a heatspreader.

A lot of later heatsinks that also advertise Socket A compatibility can be pretty tight and put a lot of force on the CPU die. Since Pentium IIIs don't have pads in the corners like Socket A chips do, it's very easy for the heatsink to tip slightly when mounting which can crack the corners off of the die pretty easily. Doesn't happen all the time, but it's something to watch out for.

Hi, do you know of any heatspreader for a Coppermine CPU? I was about to start building this rig up on this week but if i can get something to prevent the die from possible break that's probably better. The heatsink i've got it's kinda large for this CPU. So i'm figuring out if just going with the stock heatsink and fan is not in fact a bad idea.

I think also the pads that are present on some of the socket a processors could work on a coppermine one, as i think the problem is with the pressure the heatsink does against the CPU die.

I guess otherwise i'll try to reduce the pressure that the heatsink bar does by bending it a bit more and be more careful when installing it.

There are late Coppermine CPU's that have same heat spreader as Tualatins.