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New Crazy Idea: Build a slot1 pcb for 2 cpus

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First post, by Alahndro

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OK. About 3 years ago I came around with the thought of trying to run newer CPUs on an older P3-Boards. Sadly It turned out not to be possible.
Introduction and CPU Adapter Idea

The last days I was searching around the internet for quad-cpu boards of that era and could not find one
Then I remembered my analysis from this older idea and the fact that the p3 FSB is a purely passive bus and all CPUs run parallel on it.
The only important signals are the bp0/1 that get twisted from one cpu to the next and manage which one can access the bus.
I've read about these signals from talks about slotket adapters, some are smp-capable and some are not.

Idea: Build a slot1-pcb that hold 2 cpus!
I'd take upga ones, they are smaller and have a lower power consumption (the onboard dc/dc converter must supply both)

And if you have a dual slot1 board like my asus p2b-ds you can equip it with a second board, making it a quad-cpu system
But why stop there? Maybe a quad-slot1 pcb is possible too resulting in a octa system.
I don't know the limit for the cpu count on the p3-fsb and for this it would need a dedicated power converter.

Is that idea too crazy or not?

Reply 1 of 23, by leonardo

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Alahndro wrote on 2022-10-22, 09:38:

...
Is that idea too crazy or not?

Uhhh... given that period operating systems (even Windows 2K/XP) support multi-core / multi-CPU systems rather poorly, I'd ask what the ultimate purpose of such a system would be?

If the answer was supposed to be 'but it would be fun/cool!' I apologize. 😁

[Install Win95 like you were born in 1985!] on systems like this or this.

Reply 2 of 23, by the3dfxdude

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Should he run Vista?

Reply 4 of 23, by luckybob

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I love your spirit!

however the reasons this would not work could fill a book.

Short answer, if you are dead set on quad cpu, you need to do some research on Xeon setups.

It is a mistake to think you can solve any major problems just with potatoes.

Reply 5 of 23, by Sphere478

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There is a user around here who has been working on something like this.

Slot 1 to dual 370 or socket 8 adapter.

They seem convinced that it is possible but there is a catch according to them when we spoke. Lines must be ran from the new pcb to isa and pci to pickup the interruption signals. I haven’t looked into this myself so I only have what they said to go on

Sphere's PCB projects.
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Sphere’s socket 5/7 cpu collection.
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SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod
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Tyan S1564S to S1564D single to dual processor conversion (also s1563 and s1562)

Reply 6 of 23, by BitWrangler

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No! This will hold up vital work on a triple SLI bridge for Trident TVGA9000 cards, you don't understand, it's imperative to be able to use 3 together to get the video up to a speed equivalent to other SuperVGA cards. 😉

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 7 of 23, by Kreshna Aryaguna Nurzaman

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leonardo wrote on 2022-10-22, 17:41:
Alahndro wrote on 2022-10-22, 09:38:

...
Is that idea too crazy or not?

Uhhh... given that period operating systems (even Windows 2K/XP) support multi-core / multi-CPU systems rather poorly, I'd ask what the ultimate purpose of such a system would be?

If the answer was supposed to be 'but it would be fun/cool!' I apologize. 😁

The only thing comes to mind is Falcon 4.0, which already supports multi CPU in 1998. But since the game can be installed on modern systems, then why bother.

Never thought this thread would be that long, but now, for something different.....
Kreshna Aryaguna Nurzaman.

Reply 8 of 23, by luckybob

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leonardo wrote on 2022-10-22, 17:41:

Uhhh... given that period operating systems (even Windows 2K/XP) support multi-core / multi-CPU systems rather poorly, I'd ask what the ultimate purpose of such a system would be?

If the answer was supposed to be 'but it would be fun/cool!' I apologize. 😁

yea, the official reason for multi-cpu and/or multi-gpu is dick waving.

in 2000/xp it does give a *SLIGHT* performance gain, even with single-threaded games. however the improvement is entirely dependent on how many background tasks the 2nd cpu can take off the first.

It is a mistake to think you can solve any major problems just with potatoes.

Reply 9 of 23, by Sphere478

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luckybob wrote on 2022-10-23, 16:48:
leonardo wrote on 2022-10-22, 17:41:

Uhhh... given that period operating systems (even Windows 2K/XP) support multi-core / multi-CPU systems rather poorly, I'd ask what the ultimate purpose of such a system would be?

If the answer was supposed to be 'but it would be fun/cool!' I apologize. 😁

yea, the official reason for multi-cpu and/or multi-gpu is dick waving.

in 2000/xp it does give a *SLIGHT* performance gain, even with single-threaded games. however the improvement is entirely dependent on how many background tasks the 2nd cpu can take off the first.

Probably more performance gain by rolling back to 9x 🤣 for single thread games

But multi tasking. ZOOM!

Sphere's PCB projects.
-
Sphere’s socket 5/7 cpu collection.
-
SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod
-
Tyan S1564S to S1564D single to dual processor conversion (also s1563 and s1562)

Reply 10 of 23, by leonardo

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luckybob wrote on 2022-10-23, 16:48:
leonardo wrote on 2022-10-22, 17:41:

Uhhh... given that period operating systems (even Windows 2K/XP) support multi-core / multi-CPU systems rather poorly, I'd ask what the ultimate purpose of such a system would be?

If the answer was supposed to be 'but it would be fun/cool!' I apologize. 😁

yea, the official reason for multi-cpu and/or multi-gpu is dick waving.

in 2000/xp it does give a *SLIGHT* performance gain, even with single-threaded games. however the improvement is entirely dependent on how many background tasks the 2nd cpu can take off the first.

Let's all smile and wave then, l o l.

[Install Win95 like you were born in 1985!] on systems like this or this.

Reply 11 of 23, by luckybob

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Not to de-rail the thread buuuuuuuuuutttttttttt......

https://imgur.com/gallery/4B6GUsp

It is a mistake to think you can solve any major problems just with potatoes.

Reply 12 of 23, by PARKE

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And here another one:

The attachment GA-6RD7.jpg is no longer available

Reply 14 of 23, by BitWrangler

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PARKE wrote on 2022-10-24, 00:53:

And here another one:GA-6RD7.jpg

Did that ever get shipped? All I get on it is Comdex teaser pics then crickets.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 16 of 23, by CwF

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luckybob wrote on 2022-10-23, 16:48:
leonardo wrote on 2022-10-22, 17:41:

Uhhh... given that period operating systems (even Windows 2K/XP) support multi-core / multi-CPU systems rather poorly, I'd ask what the ultimate purpose of such a system would be?

If the answer was supposed to be 'but it would be fun/cool!' I apologize. 😁

yea, the official reason for multi-cpu and/or multi-gpu is dick waving.

in 2000/xp it does give a *SLIGHT* performance gain, even with single-threaded games. however the improvement is entirely dependent on how many background tasks the 2nd cpu can take off the first.

*SLIGHT* is simply wrong, it depends on many things.
SimCity4, Pacific Fighters, MechWarrior4, and more very much use not just 2, but touch 3-4 cores or cpus easily and were never claimed to be smp games AFAIK. Load times are much much better. What's interesting is games that will run on the second socket, now with extra cores. My current dual X5687 XP is clocked DOWN since these old games will melt the thing without need. Even back in my dual slot days it wasn't a brag, it's simply better.

I used to know what I was doing...

Reply 17 of 23, by the3dfxdude

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Back in the Windows 2000 days I was running a dual slot 1 board (or was it NT4.0?) I noticed how the slower slot 1 clocked processors actually felt faster than higher clocked single CPU P3/P4, which to me then, was a reason to go to NT and use this system as a daily driver, as NT supported this and it was much more smooth over the typical consumer system. There is a point however, that it is hard to measure the benefit of multiple processor cores, and possibly could see no benefit when it comes to running most games by themselves. So rigging up a single slot to do the same is just a nice to have, but maybe not needed for that era, not based on OS, but on the games themselves, and to what end? Just smoothness for the ones that can do it?

So I don't think there is an OS fault here, but that one of multiple factors in play, one that it was too expensive option then to really consider for consumer games. Multiple processors systems were forward thinking systems, and had all the capabilities then, but the benefits are hard to state, and that's even so today. You kind of need a hog of an OS to start pushing the limits, and games that assume that you do have that kind of platform to get away with hogging the extra CPU.

Reply 18 of 23, by Alahndro

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Sphere478 wrote on 2022-10-23, 02:59:

There is a user around here who has been working on something like this.

Slot 1 to dual 370 or socket 8 adapter.

They seem convinced that it is possible but there is a catch according to them when we spoke. Lines must be ran from the new pcb to isa and pci to pickup the interruption signals. I haven’t looked into this myself so I only have what they said to go on

Can you pleased Tell me WHO that ist? I'd Like to get in Touch with him about this Idea.

I'm already dreaming about a hex-cpu Monster and later trying it with more modern CPUs...

Reply 19 of 23, by Alahndro

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Sphere478 wrote on 2022-10-23, 02:59:

There is a user around here who has been working on something like this.

Slot 1 to dual 370 or socket 8 adapter.

They seem convinced that it is possible but there is a catch according to them when we spoke. Lines must be ran from the new pcb to isa and pci to pickup the interruption signals. I haven’t looked into this myself so I only have what they said to go on

Can you pleased Tell me WHO that ist? I'd Like to get in Touch with him about this Idea.

I'm already dreaming about a hex-cpu Monster and later trying it with more modern CPUs...