VOGONS


Pentium 66 MHz socket 4 system

Topic actions

First post, by mpe

User metadata
Rank Oldbie
Rank
Oldbie

I thought I'll put my favourite parts together and build a Socket 4 system..

Briefly considered Batman's Revenge motherboard . However, my tuned ECS SI5PI which I recently upgraded to 2MB of L2 cache is probably even better option.

DSC_5741.jpeg
Filename
DSC_5741.jpeg
File size
584.35 KiB
Views
1404 views
File license
CC-BY-4.0

As for CPU. I'ld like to have two options. I'll start with SX837 P66 CPU -a classic choice with the original Pentium logo and even has the FDIV bug. However, I am keeping my SU082 Pentium Overdrive as alternative when I need the ultimate Socket 4 performance:

DSC_5728.jpeg
Filename
DSC_5728.jpeg
File size
298.72 KiB
Views
1404 views
File license
CC-BY-4.0
DSC_5729.jpeg
Filename
DSC_5729.jpeg
File size
394.77 KiB
Views
1400 views
File license
CC-BY-4.0

Given the motherboard integrates the infamous CMD640 IDE chip I thought I'd be happier with going SCSI as the main storage. Adaptec AHA-2940-S76 PCI card:

DSC_4237.jpeg
Filename
DSC_4237.jpeg
File size
448.74 KiB
Views
1404 views
File license
CC-BY-4.0

Which will be maxed out by SD2SCSI v 6.0 with a fast SD card as the backing storage:

DSC_4662.jpeg
Filename
DSC_4662.jpeg
File size
332.44 KiB
Views
1404 views
File license
CC-BY-4.0
Last edited by mpe on 2020-03-08, 23:31. Edited 7 times in total.

Blog||486DX-50|NexGen 586|S4

Reply 1 of 30, by mpe

User metadata
Rank Oldbie
Rank
Oldbie

This Diamond Stealth 64 VRAM which looks like one big cache of VRAM chips will be handling DOS/Windows 3.1 graphics.

DSC_4409.jpeg
Filename
DSC_4409.jpeg
File size
458.65 KiB
Views
1402 views
File license
CC-BY-4.0

And the sound will be provided by this Gravis Ultrasound P&P Pro (also with maxed RAM).

DSC_5379.jpeg
Filename
DSC_5379.jpeg
File size
459.25 KiB
Views
1402 views
File license
CC-BY-4.0

And I’ll put everything into this Dan PC desktop case I salvaged from another PC of that era.

DSC_5721.jpeg
Filename
DSC_5721.jpeg
File size
166.69 KiB
Views
1402 views
File license
CC-BY-4.0

Blog||486DX-50|NexGen 586|S4

Reply 3 of 30, by mpe

User metadata
Rank Oldbie
Rank
Oldbie

Makes sense. GUS SB emulation sucks. Let's put in this Sound Blaster Pro 2.0 for SB compatibility.

DSC_5341.jpeg
Filename
DSC_5341.jpeg
File size
338.33 KiB
Views
1358 views
File license
CC-BY-4.0

Blog||486DX-50|NexGen 586|S4

Reply 7 of 30, by mpe

User metadata
Rank Oldbie
Rank
Oldbie
Intel486dx33 wrote on 2020-03-09, 10:21:

The SB AWE64 has better sound quality than the SB Pro 2.0 in my opinion.

Yes could be an option. I expect newer stuff to be using the GUS which plays just as well in many games.

The purpose of SB Pro 2.0 is just to have compatibility. Unlike SB16/AWE32/AWE64 can do stereo in SB Pro mode and has true OPL3 😀

Blog||486DX-50|NexGen 586|S4

Reply 8 of 30, by root42

User metadata
Rank Oldbie
Rank
Oldbie

Wow. You are throwing rare hardware into this build like it’s nothing. 😀
Hope you will show it off when the build is finished!

YouTube and Bonus
80486DX@33 MHz, 16 MiB RAM, Tseng ET4000 1 MiB, SnarkBarker & GUSar Lite, PC MIDI Card+X2+SC55+MT32, OSSC

Reply 9 of 30, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

Nice Pentium. That's a pretty rare chip. It's a P66 which is way less common than the P60, plus it's in mint condition, and it says "Processor" which I believe makes it somewhat more collectible.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 10 of 30, by jheronimus

User metadata
Rank Oldbie
Rank
Oldbie

Just wanted give a heads up — a Soc4 Pentium really needs at least a heatsink. Better yet, some active cooling — this is definitely one of the hotter chips of the era. You probably just wanted to make some beauty shots to show off the golden cap, but better safe than sorry 😀

Looks like this will be a pretty cool system! SB Pro 2 is indeed a nice companion for a GUS. Not a lot of games actually need an SB16, and out of those that do, most will be much better with a GUS.

My Telegram blog about retro hardware (in Russian)

Pentium 133, 32 MB RAM, S3 Trio64V+, Crystal 4232, Dreamblaster X2 and Roland MT-32
Pentium III 1000, 512 MB RAM, Voodoo 5 5500 AGP, SB Live 5.1, SB32 CT3930, Gravis Ultrasound Max rev2.1

Reply 11 of 30, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

I would use a beat up P66, and put this nice one in display case.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 12 of 30, by mpe

User metadata
Rank Oldbie
Rank
Oldbie

Sure. The above CPU will remain on display. For the actual use I always use another P66 with stock heatsink/fan glued in. I hate scratching these CPUs too.

Talking about putting rare S4 CPUs on display. I also have this early all-ceramic P60 part that is perhaps even more collectable. I never mount a heatsink on that one. Although it does seem to have some thermal pad marks from its past life.

DSC_5746.jpeg
Filename
DSC_5746.jpeg
File size
222.63 KiB
Views
1289 views
File license
CC-BY-4.0

Blog||486DX-50|NexGen 586|S4

Reply 13 of 30, by matze79

User metadata
Rank l33t
Rank
l33t

i searching a 66Mhz Pentium for ages.. i only find the 60Mhz parts, are the 66Mhz parts so rare ?

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 14 of 30, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

Yeah, the 66MHz parts were far less common for a couple of reasons. Intel had problems producing enough of them initially. Then there were stability issues, so they had to increase the recommended voltage from 5.0V to 5.15V. Plus not all socket4 boards were up to the task of offering a 66MHz FSB...and even when 66MHz was an option, it was often not faster than a well tuned 60MHz system. My guess is that all the extra wait states to the RAM and cache memory killed any potential performance gain (10% at most).

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 16 of 30, by matze79

User metadata
Rank l33t
Rank
l33t

yeah, but overclocking is not the same as having real 66Mhz part 😉
at least it feels like cheating.

I had a Escom P60, which ran passiv cooled, Stock!
it ran for years in a lawyer's bureau.
they must had climate control because it constantly freezed when under load.
until i added a fan.
no idea how they worked with this machine 😀

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 17 of 30, by chinny22

User metadata
Rank l33t
Rank
l33t

Gus, SD2SCSI, sexy desktop case, not only do I approve but I'm also jealous (FDIV bug is pretty cool as well)

Reply 18 of 30, by amadeus777999

User metadata
Rank Oldbie
Rank
Oldbie

Sweet system - fine as heck components!
I had a ceramic P60 in my Vobis system. All other Pentiums I have come across thus far are gold top. As already stated the P66 parts are pretty rare.

p.s.: thanks again for helping out with the BIOS image.

Reply 19 of 30, by Ponjiayulady

User metadata
Rank Newbie
Rank
Newbie

Pentium 60Mhz real performance

Attachments