I was discussing with Joe "RETRO Hardware" about the 6200/64bit being or not heavily held back by highly clocked Tualatins in the comment section of he's last video
To be precise my argument was independent of how much socket 370 is holding back the 6200/64, I just thought that since he's testing Tualatins at around 2GHz would be much more interesting pair them with something better that can be compared also with later platforms, but anyway, since he confidently stated that "any 6200 is triple overpowered for s370 system" I took the opportunity to test one of my 6200 with slightly overclocked Pentium III-S and a 3.20GHz Prescott

So, I don't know if anyone would care about the results, but since I already have them I thought to post, maybe in future somebody would find them useful for any reason

These are the systems I put together for the tests

• Pentium III-S 1.40@1.54GHz (147x105)
• ASUS TUSL2-C
• MSI 6200 clocked at 350/200 w/ 256MB DDR at 64bit
• 2x256MB PC133@147MHz CL2-2-2-7
• Clean WinXP sp3 on 8GB SLC CF (IDE)

• Pentium IV "Prescott 1M" 3.20GHz
• ASUS P4C800 DELUXE
• MSI 6200 clocked at 350/200 w/ 256MB DDR at 64bit
• 2x 512MB DDR400 CL2-3-3-6
• Clean WinXP sp3 on 8GB SLC CF (IDE)

Results

3DMark 2001SE

• Tualatin: 5970 pts
• Prescott: 7974 pts

With the 6200 overclocked @400/250

• Tualatin: 6423 pts
• Prescott: 9534 pts

Quake3 1.32c HQ 1024x768 demo "four"

• Tualatin: 140.5 fps
• Prescott: 147.3 fps

With the 6200 overclocked @400/250

• Tualatin: 159.9 fps
• Prescott: 184.2 fps

Quake3 1.32c HQ 1280x1024 demo "four"

• Tualatin: 93.3 fps
• Prescott: 94.5 fps

With the 6200 overclocked @400/250

• Tualatin: 117.3 fps
• Prescott: 120.0 fps

Serious Sam The First Encounter 1.05 D3D Normal 1024x768 demo "mp0002"

• Tualatin: 63.6 fps
• Prescott: 77.3 fps

With the 6200 overclocked @400/250

• Tualatin: 70.7 fps
• Prescott: 91.7 fps

Serious Sam The First Encounter 1.05 D3D Normal 1280x1024 demo "mp0002"

• Tualatin: 43.3 fps
• Prescott: 49.3 fps

With the 6200 overclocked @400/250

• Tualatin: 52.2 fps
• Prescott: 61.8.7 fps

* for those wondering how are performances using OpenGL, the answer is: always few fps slower on average but with less excursion both for lows and highs

So my conclusion is that with the Tualatin @1.54GHz the 6200 is a little slower, especially in 1024x768 but nothing too unexpected or dramatic, since the 6200 with such low memory bandwidth is struggling to push enough pixels on screen.
The story starts to change even with a little overclock of 50Mhz on GPU and RAM (I did not cross tested this, but I can bet almost all the performance gain comes from the RAM) and here we can see that although the Tualatin is still able to allow some performance increase, the Prescott allows now higher margins, sign that the card was really held back at 350/200 and can now benefit from more CPU power.

Will attach the 3Dmark screenshots for reference

Cheers