DarthSun wrote on 2024-11-09, 16:08:

feipoa wrote on 2024-11-09, 04:37:

DarthSun wrote on 2024-05-01, 14:35:

You need a good setup and you're near Intel or better ... […]
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You need a good setup and you're near Intel or better ...

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Nice! These belong in the 686 Benchmark thread. I also ended my testing at about 600 MHz.

Thanks!
The full test here.

I mean, you should post them in the 686 benchmark thread where the topic fits the contents.

feipoa wrote on 2024-11-10, 00:07:

DarthSun wrote on 2024-11-09, 16:08:

feipoa wrote on 2024-11-09, 04:37:

Nice! These belong in the 686 Benchmark thread. I also ended my testing at about 600 MHz.

Thanks!
The full test here.

I mean, you should post them in the 686 benchmark thread where the topic fits the contents.

I didn't know, I thought each Cyrix model could go here, sorry.

they can go in both places.

On ebay there is actually a very rare Cyrix M-II 333 2.2 volt with gold top for sell. I didn't know that this 4x66 Mhz versions were made with gold top. In the Internet i found only photos of 333GP 2.2V cpus with white aluminium heat spreader.
https://www.ebay.com/itm/267063937743?_trkpar … %3Avlp_homepage

Kinda funny to see "fan/heatsink required"

It's like seeing "petrol required" on a car.

It's just expected now.

You'd think it would be well enough known by Pentium class times, but you could just get away with running some of the slower 1.5 multi socket 5 intels with no sink, by the C0 and later steppings, so I guess the cheap builders did. Maybe the 6x86L could cope with it sometimes also.

elmatero wrote on 2024-12-06, 09:44:

On ebay there is actually a very rare Cyrix M-II 333 2.2 volt with gold top for sell. I didn't know that this 4x66 Mhz versions were made with gold top. In the Internet i found only photos of 333GP 2.2V cpus with white aluminium heat spreader.
https://www.ebay.com/itm/267063937743?_trkpar … %3Avlp_homepage

That “gold” mobile MIIv chip isn’t found on cpu-world or any of the usual suspects so it might be uncommon. (Examples I’ve seen are black or silver)

Gold tops are associated with a specific production fab and “era”. Black and Silver “cheap” flip chips later.
IBM made most of the late era cheaper silver flip chips as an example. 2.2v barely launched when National was making silicon and ST couldn’t handle the 2.2 volt process (from what I remember)

To know for sure the code on the bottom or back of the chip would need to be decoded, if the code doesn’t exist usually that meant a low production unit early in the process (Cyrix usually sold its engineering samples just like they did retail chips)

4x 66mhz was a strange setup for an MII to start with considering most Cyrix and Even IBM pr333s were always 83x3 and Cyrix would almost always choose 100x2.5x for pr366 considering how overhead constrained they were.

I can only imagine 4x 66 was chosen so builders could use up obsolete motherboards

This gold MIIv was made by VIA (v letter after MII), it's interesting if was made in Taiwan?
In year 2000 Via still advertised MII models MII- 300, MI- 333, MII- 400 and MII- 433 . Probably this 333 was this goldtop 4x66MHz.
https://web.archive.org/web/20010330152155/ht … roducts/mii.htm

rmay635703 wrote on 2024-12-06, 15:14:

I can only imagine 4x 66 was chosen so builders could use up obsolete motherboards

Cyrix mostly angled for the upgrade markets.
What do you upgrade your p100 to in the late 90s?
Pentiums weren't really available and AMD had moved on to ss7/462.

So Cyrix and a few others were the only options.

myne wrote on 2024-12-09, 00:53:

Cyrix mostly angled for the upgrade markets. What do you upgrade your p100 to in the late 90s? Pentiums weren't really availabl […]
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rmay635703 wrote on 2024-12-06, 15:14:

I can only imagine 4x 66 was chosen so builders could use up obsolete motherboards

Cyrix mostly angled for the upgrade markets.
What do you upgrade your p100 to in the late 90s?
Pentiums weren't really available and AMD had moved on to ss7/462.

So Cyrix and a few others were the only options.

2.2 volt and 4x multiplier was't an upgrade part for obsolete mothetboards 😉 . It was rather part for embeded computers.

elmatero wrote on 2024-12-09, 09:29:

myne wrote on 2024-12-09, 00:53:

Cyrix mostly angled for the upgrade markets. What do you upgrade your p100 to in the late 90s? Pentiums weren't really availabl […]
Show full quote

rmay635703 wrote on 2024-12-06, 15:14:

I can only imagine 4x 66 was chosen so builders could use up obsolete motherboards

Cyrix mostly angled for the upgrade markets.
What do you upgrade your p100 to in the late 90s?
Pentiums weren't really available and AMD had moved on to ss7/462.

So Cyrix and a few others were the only options.

2.2 volt and 4x multiplier was't an upgrade part for obsolete mothetboards 😉 . It was rather part for embeded computers.

That makes sense considering how rare a laptop MII was.

I had obsolete motherboards (from circa 1996) that didn’t support PC100 but did support 2.2/2.4/ or 2.5 volts.
They always supported 75mhz FSB if not 83mhz which meant better options existed for overdrives.

I was guilty of running many. K6-2’s at 2.5 volts and using the 6x multiplier at max FSB

elmatero wrote on 2024-12-08, 21:35:

This gold MIIv was made by VIA (v letter after MII), it's interesting if was made in Taiwan?
In year 2000 Via still advertised MII models MII- 300, MI- 333, MII- 400 and MII- 433 . Probably this 333 was this goldtop 4x66MHz.
https://web.archive.org/web/20010330152155/ht … roducts/mii.htm

I had forgotten the VIA chips went back to gold, I could swear the pr433 I had was a black top, ah well

rmay635703 wrote on 2024-12-09, 15:26:

I had obsolete motherboards (from circa 1996) that didn’t support PC100 but did support 2.2/2.4/ or 2.5 volts.
They always supported 75mhz FSB if not 83mhz which meant better options existed for overdrives.

Lucky you i have motherboard from late 1997 that has minimum volatage of 2.8 , 3,5 multiplier (max) and maximum fsb of 75 mhz 🙁

I was literally just digging through some boxes of tech stuff that was donated to me, I found this single poor little CPU sitting on the bottom... undamaged, no bent pins!

It will be given a proper home until it can be tested ! 😀

Odd 208MHz i like it 😀 I have the same PR 266 but from IBM. In my case 83 MHz bus cause problem with buildin IDE controller (registry error afer reboot of windows) on my Via MPV3 board. Even with the proper PCI divider set i have to insert Adaptec IDE card to solve this Issue.

elmatero wrote on 2024-12-10, 07:38:

Odd 208MHz i like it 😀 I have the same PR 266 but from IBM. In my case 83 MHz bus cause problem with buildin IDE controller (registry error afer reboot of windows) on my Via MPV3 board. Even with the proper PCI divider set i have to insert Adaptec IDE card to solve this Issue.

Just glad it survived in the bottom of that box. Thankfully it was mostly cables and adapters.

I have an IBM branded PR166+ in my current DOS build, may drop this one in there to test it, and if it works, it's a bit faster. Though for most DOS games I play, the current PR166 (133MHz) is good enough. 😜

DOS Build: https://theclassicgeek.blogspot.com/2024/02/a … s-3x-retro.html

elmatero wrote on 2024-12-10, 07:38:

Odd 208MHz i like it 😀 I have the same PR 266 but from IBM.

I was just eyeballing my IBM PR266 wondering what to do with it also. Does anyone know anything about the letters at the end of the product code? GD, GE, GF? Only the gold ones of IBM seem to have Gx, the blacktop gets Hx designations.

G- gold top
H- Black aluminium top
-A -B -C-D -E -F its IBM chip revision info

GF and HF Are the newest one's made in 0,25 um.

Oh nice, thanks, mine is a GF, I was hoping that meant it was latest revision.

Full identification guide is here https://www.cpushack.com/CyrixID.html

Awesome thanks, I forgot that site existed, years since I've been there. I guess google doesn't like it much or something when I'm looking up CPUs, would rather send me to the, relatively informationless for non-intel parts, cpu-world.. another thing with them yesterday, looking up AMD CPCC 286es and they only show the ceramic top with the date codes, WTF all the info is on the bottom you numskulls.