bloodem wrote on 2025-02-10, 18:11:

I don't usually like doing this to retro parts but, in my defence, I was having a lazy day when I did it 😅 ).

You can always drill the board

PS. The Vtt voltage is often made by a regulator, independent of the core voltage
For example, LT1086.
Therefore, it is easier to connect VttPwrGD with Vcc.
DynOE must be powered from Vtt.
Otherwise, the CPU will not set the BSEL (bus frequency selection) and ViD (voltage selection) status.
Otherwise, get ready for surprises - for example, an attempt to start on bus 133MHz with a voltage of 1.3 Volts.

bloodem wrote on 2025-02-02, 13:12:

I got my hands on yet another MSI 6905 ver 2.3 slotket (as if I didn't already have enough of these 😅 ).

I have seen you over on the AmiBay forum where you seem to have gotten your hands on an MS-6905 V2.4 Slotket.
Since I am still new to this forum (at least I still can't send PMs), could you please contact me? I have a few questions if you don't mind.

Thanks!

BitsUndBolts wrote on 2025-02-17, 08:47:

I have seen you over on the AmiBay forum where you seem to have gotten your hands on an MS-6905 V2.4 Slotket.
Since I am still new to this forum (at least I still can't send PMs), could you please contact me? I have a few questions if you don't mind.

Thanks!

Sure, PM sent! 😀

bloodem wrote on 2025-02-17, 12:59:

Sure, PM sent! 😀

Does a Ver 2.4 exist ?

PARKE wrote on 2025-02-17, 13:28:

Does a Ver 2.4 exist ?

No, I think BitsUndBolts confused the version number, I don't think there ever was a 2.4 version.

Ok, thanks. I try to keep my info up to date.

bloodem wrote on 2025-02-17, 13:31:

No, I think BitsUndBolts confused the version number, I don't think there ever was a 2.4 version.

I guess I got confused with version 2.4 - this version was mentioned in a thread on AmiBay.
That doesn't exist apparently 😀

I got your PM, unfortunately, I am too new and cannot answer directly.
Could you send me another message and include an email I could reach you?
Alternatively, you can send a message to my email bitsundbolts at gmail dot com.

Thanks,
Alex

BitsUndBolts wrote on 2025-02-17, 17:24:

Alternatively, you can send a message to my email bitsundbolts at gmail dot com.

Will do. 😀

I just wanted to provide a final update - my Nehemiah is perfectly stable (12 x 100Mhz FSB) with my new slotket. I ended up using an FX5200, and I made sure to disable SBA and FW (that is buggy even on other BX systems). With this combo I can run 3DMark 2000 forever and it will not crash to desktop.

So my conclusion is that the Abit Slotket iii is not a good choice for Nehemiah. You speculated that the reason could be because Nehemiah has newer features like SSE (and CMOV) that are placing extra stress on the slotket and require better voltage stability -- that could very well be the case. I have not tested with an older GeForce and older drivers, maybe it would be stable on those, but newer generation cards run much cooler and perform better.

I'm glad I was able to find a decent slotket.

I also have a MS-6905 with that cap fitted from factory. I'll have to get a pic.

mockingbird wrote on 2025-02-20, 14:06:

So my conclusion is that the Abit Slotket iii is not a good choice for Nehemiah.

Can you post a close up photo of that Abit slotket ? Thanks in advance.

PARKE wrote on 2025-02-20, 14:25:

Can you post a close up photo of that Abit slotket ? Thanks in advance.

Certainly.

My AA370TS arrived today and I'll be testing that with Nehemiah too if my second CPU ever arrives in the mail. It's currently running a sanity check with a Coppermine P3 at 6.5 x 100.

Wonder how (if at all) the GTL2000 differs from the TVC16222 /16222A (that's the clamp IC on all my SlotKET !!!s)

mockingbird wrote on 2025-02-21, 03:35:

My AA370TS arrived today and I'll be testing that with Nehemiah too if my second CPU ever arrives in the mail. It's currently running a sanity check with a Coppermine P3 at 6.5 x 100.

I've been busy and forgot to post an update.

I've also tested this slotket extensively with a Coppermine 900 MHz (FSB100) and a Coppermine 1 GHz (FSB133), and I was about to declare it stable (it passes every test, including hours upon hours of Prime95 and 3DMark2000), however, the system completely freezes in Quake 3 if... I bring down the console (this also happens right after launching the game, when accessing the console in the main menu). 😁

I can play Quake 3 for hours and it will work fine, but if I bring down the console, it usually freezes within the first minute (most of the times within the first 10 seconds). If I use the same CPUs with a different slotket, everything works fine, no console freezes. I even recapped it (though the original caps were still quite OK), but the behavior persists. I did not test the Nehemiah with it yet.

I'm curious if you will see the same behavior with your particular slotket + the P3 650.

bloodem wrote on 2025-02-21, 16:50:

I can play Quake 3 for hours and it will work fine, but if I bring down the console, it usually freezes within the first minute (most of the times within the first 10 seconds). If I use the same CPUs with a different slotket, everything works fine, no console freezes. I even recapped it (though the original caps were still quite OK), but the behavior persists. I did not test the Nehemiah with it yet.

What did you use? Originals were 33uF, I put in 47uF.

Ok, I'll update you... For the AA370TS, I'm switching my testing from my FX cards back to the GeForce 4 MX440 (but still 45.23 drivers). Platform is P2B modded to get 3.3V for the AGP straight from the PSU. I want to rule out any issues I was having with the FX as the fault of the slotket.

mockingbird wrote on 2025-02-21, 19:21:

What did you use? Originals were 33uF, I put in 47uF.

Same. 😀 Panasonic 47uF / 25V / Low ESR (EEUFR1E470).

bloodem wrote on 2025-02-22, 05:29:

Same. 😀 Panasonic 47uF / 25V / Low ESR (EEUFR1E470).

Well, my AA370TS is definitely unstable (Coppermine 6.5 x 100)... I tested with my Abit slotket for over 24 hours in 3DMark and that was perfectly stable, so it's definitely the slotket.

I have an AA370TS too if there's need for help. Mine ran a Coppermine 1GHz (7.5 x 133) over an ABIT BE6-II last time I used it and it was perfectly stable.

Don't think I have any VIA CPUs left unfortunately, but for Coppermine I do have some chips. (Celeron 1100, P3 733, 866 so far)

bloodem wrote on 2025-02-22, 05:29:

mockingbird wrote on 2025-02-21, 19:21:

What did you use? Originals were 33uF, I put in 47uF.

Same. 😀 Panasonic 47uF / 25V / Low ESR (EEUFR1E470).

Look at the socket on Intel's D815ee.
Inside there are many large ceramic capacitors of 4.7-10 uf.
Electrolytic capacitors with such an ESR (0.3 Ohm) will not give anything.
With such a socket PCB routing, you need something like 330uF * 6.3V up to 30-50mOhm.
Or polymer ones, of approximately the same value.

shevalier wrote on 2025-02-24, 05:15:

Look at the socket on Intel's D815ee. Inside there are many large ceramic capacitors of 4.7-10 uf. Electrolytic capacitors with […]
Show full quote

Look at the socket on Intel's D815ee.
Inside there are many large ceramic capacitors of 4.7-10 uf.
Electrolytic capacitors with such an ESR (0.3 Ohm) will not give anything.
With such a socket PCB routing, you need something like 330uF * 6.3V up to 30-50mOhm.
Or polymer ones, of approximately the same value.

Interesting suggestion, but if that's the case, then the slotket should also have these types of low-esr caps, and I don't know of a single one that does. I'd love to see someone design a new one.