The PIII-S without the HS should be the same height as the Coppermine, so IMO the same cooler should fit.
Anyway you can easily check with the thermal paste that the contact is done correctly.

Ordered it for 29€ with shipping. Will do some feedback when I get it, thanks!

The heatspreader is mostly there (I think) to protect the core during installation. As long as you're careful it should be fine.

Maybe you could use some of those pads like Athlon CPUs from the time had on each corner.

Thermalwrong wrote:

Maybe you could use some of those pads like Athlon CPUs from the time had on each corner.

Not familiar with this. Any pic?

they were like the little rubber circles under some mice but smaller.

Sure it will be fine, and there's certainly no problem de-lidding Tualatins - https://forums.overclockers.com.au/threads/pe … -delid.1136735/ - but it's maybe not the cleanest effort I've seen removing this particular IHS (the deformed bottom left gasket compound looks like they used the lever rather than the slice method which can risk damage to the board package surface) and I'd be double-checking the arrowed marks aren't exposed copper traces.

Thermalwrong wrote:

The heatspreader is mostly there (I think) to protect the core during installation. As long as you're careful it should be fine.

Maybe you could use some of those pads like Athlon CPUs from the time had on each corner.

Warlord wrote:

they were like the little rubber circles under some mice but smaller.

Those are easy enough to DIY too. Just stick some double sided tape on something suitable (used 1 or 2 mm gasket rubber sheet myself) and punch as many pads as you need with a hole punch, or simply cut them out with a knife or scissors.

Didn't some coolers come with a metal shim?

Thanks for the input, hopefully the cpu works and I won't have to return it. My main concern was if the cpu overheats without the IHS, using a normal stock cooler but I rewatched Phil's review and came to the conclusion that it is more power efficient than the coppermine chips and thus gets less heated.

Update: The cpu works without a problem. Today I completed benchmarking and didn't occur any issue. Performance has increased significanlty as shown in the results:

Windows 98se Benchmarks: Coppermine 1000EB Tualatin 1.4GHz

3D Mark 99 Max (default resolution)........... 7018...................... 10004
3D Mark 2000 (default resolution)............... 6671...................... 7768
GLQuake timedemo (1280x1024x32).......... 108,3..................... 109,2
Quake II timedemo (1024x768).................. 179,4..................... 265,4
Quake 3 timedemo (1024x768x32).............. 98,3..................... 110,6
Unreal castle fly timedemo (1024x768x32)..... 70,3..................... 78,2
MDK2 (1024x768x32) ................................ 101,7..................... 99,8 (the only strange result; I assume it's because of the gpu bottleneck)
Expendable timedemo (1280x1024x32)............ 62,1..................... 69,6


MS-DOS 7.1 Benchmarks:

3D Bench 1.0c ............................... 658,4 ...................... 1000+ (maxed it only dials 0.00)
Chris's 3D Benchmark ..................... 454,2 ..................... 858,5
Chris's 3D Benchmark (640x480)........ 149,1 ..................... 300,5
PC Player Benchmark........................ 235,5 ..................... 374,9
PC Player Benchmark (640x480)........ 181,8 ..................... 233,3
Doom timedemo (max details)........... 121,4 ..................... 126,4
Quake timedemo(640x480)................ 56,5 ..................... 63,9

I'll continue benchmariking with an FX5900XT.

cooling without a IHS is better than with an IHs, it's no wonder why de-lidding is so popular nowadays.

cooling without a IHS is better than with an IHs

It doesn't matter for Tualatin though. TDP is too low.