There's a thread on Vogons with a pdf that includes photos of about 50-60 different slotkets from various manufacturers with some notes about compatibility with coppermine and tualatin CPUs. I don't want to dig it up right now, but here are what I remember of those

1. Not sure about the S370-L. I have the plain vanilla S370 rev 1.01. It's just a celeron card with no voltage clamp
2. and 3. (S370-DL and S370-133) both support coppermines with the same voltage range and have voltage clamp

Edit: Also, those things go fast on eBay. There was a DL on ebay last month. I went to put in an offer on it and someone bought it now while I was typing in my offer 😁

all 3 models have the same cpus support, voltages, multipliers.

133 is considered high-profile because of the additional bracket.
L stands for low profile. identical to 133 otherwise.
D in the DL model stands for dual processors support.

DL is supposed to be the latest variant, but i cannot confirm or disprove if 133 really is a single processor only adapter.
Even if it is, a minor mod will probably be enough to dual-enable it.

I own a NOS s370-L and a s370-133. Unfortunately, no paperwork with them...only the boxes (maybe they never came with paperwork?).

Anyhow, the only differences that I can see is that the 133 has an extra a jumper for "cu-mine" or "celeron" and has the additional plastic surround on it. It also lists on the pcb a much greater range of voltage adjustments (although both have the same amount of voltage jumpers, 5).

Unfortunately, no DL to compare them with.

Both of the boxes are identical, besides a sticker of what's inside them. What confuses me is that the 133 says it supports 133fsb...but that's already stated in the fourth bullet point on the box (pic attached).

Physically, the 133 has three capacitors on that the L does not.

Pic of both cards.

Naming wise it would make sense that the 133 is the only one officially supporting 133 MHz FSB.

I have a paper manual that covers the 3 adapter models.

Visual reference for DL:

I added the fat brackets. Originally the adapters came with small brackets like the L version above.
4 locations for capacitors, unpopulated.
8 jumpers.

According to manual the order of the models is like this: 133, L, DL.
All of them support coppermine and 133mhz fsb officially. In fact the ones here handle 150mhz just fine.
Same 1.5-2.6 voltage settings for all of them.
133 does not have auto detection for coppermine. Requires jumper to be configured manually.
L has auto detection.
DL has auto detection and dual cpu support.

As far as I understand there were two 'generations'.
The S370, S370L and the S370D represent the oldest and were meant for Mendocino Celeron - their voltage jumpers adressed the 1.8v to 3.5v range.

Yes, there is a previous generation mendocino only models, but we are not discussing them here.

Look at the photo of the two slotkets above your post. The bottom one has only 5 voltage jumpers and is imo from the first (Mendocino) generation. It is not that straightforward to identify between the two geneations. Here another example of an early version: green pcb with desoldered jumpers - probably issued somewhere first half of 1999.

To clarify again:
We are discussing here only the latest generation of the adapters. The ones with voltage clamp (that chip on the left side).
According to the manual - the 133 model does not have auto-detection for Coppermine. That must to be configured with jumpers instead. That's why there are more jumpers on the 133 model than the L one.

pshipkov wrote on 2022-11-17, 16:16:

To clarify again:
We are discussing here only the latest generation of the adapters. The ones with voltage clamp (that chip on the left side).
According to the manual - the 133 model does not have auto-detection for Coppermine. That must to be configured with jumpers instead. That's why there are more jumpers on the 133 model than the L one.

This is correct. The 133 has a coppermine/celeron jumper, giving it six. The 133 also lists far more voltage ranges than the L does (even though both have the same number of voltage jumpers).

It seems odd that Asus would make basically redundant slockets so something must be different (functionality/compatibility) between them. Why specify that the 133 does 133FSB when it literally says a few lines above that the L runs 100/133 FSB as well? Clearly the 133 does both FSB frequencies as well.

_tk wrote on 2022-11-17, 19:06:

pshipkov wrote on 2022-11-17, 16:16:

To clarify again:
We are discussing here only the latest generation of the adapters. The ones with voltage clamp (that chip on the left side).
According to the manual - the 133 model does not have auto-detection for Coppermine. That must to be configured with jumpers instead. That's why there are more jumpers on the 133 model than the L one.

This is correct. The 133 has a coppermine/celeron jumper, giving it six. The 133 also lists far more voltage ranges than the L does (even though both have the same number of voltage jumpers).

It seems odd that Asus would make basically redundant slockets so something must be different (functionality/compatibility) between them. Why specify that the 133 does 133FSB when it literally says a few lines above that the L runs 100/133 FSB as well? Clearly the 133 does both FSB frequencies as well.

These are the latest (?) docs I have for my Asus Slot 1 adapters

So...

133 = "Better support with full retainer"

L = "Low Profile"

Otherwise they seem to function identical per that pdf. Still not sure why my 133 has the extra capacitors though.

The answer to your question according to Douglas Adams is 42.
Not sure what is not clear here. : )

Joking aside.
Here is a scenario that sounds plausible to me:
The first model (S370-133) of the second generation adapters has bigger bracket and capacitors.
Later on it was determined that capacitors can be removed (or worked around with different electrical schema), the big bracket can be replaced with small one under the low-profile formula. That is the L variant. I suspect that at least to a point this was based on cost optimization factors.

As a person who owns more than 10 slockets I must say the extra height and bracket of the S370-133 makes it way easier to remove as the others can be very difficult to remove from the slot sometimes.

S370-133 works flawlessly with my pin modified Tualatin 1400-S or with my Lin-Lin adapter and normal Tualatin 1400-S on over 15 different 440BX boards. The default auto CPU voltage setting works well in every occasions. That makes it my favourite slocket even on top of my MSI MS-6905 Ver 2.3 as it is easier to install/remove.

Share the sentiment.
These Asus S370-# guys are easily the best adapters out there.

Btw, did you try the 133 variant in a dual CPU system ?

I personally have no dual boards but it's nice to see how S370-133 does in dual board setup.

Appreciate the replies. Seems like both will do what I need (likely use a Celeron 1100 on an Asus P3B).

Just purchased an ASUS P2B-D and can test dual S370-133's on it once it arrives in the next few weeks. I don't have the plan to mod the P2B-D to accept 133FSB for now but I can test it with 1400MHz 100FSB Tualatin Celerons.