Nice collection you have there Tetrium!

I forgot to post these few Cyrix beauties I got recently.

not really a Cyrix, it's a IDT "samuel" core, but still pretty unusual being 100MHz(all the ones I have seen online have been 133Mhz FSB in this speed grade) and no level 2 cache, must be a pretty early chip. It works fine in my ASUS CUSL2 motherboard, BIOS even recognizes it correctly,it's VERY slow about Celeron 300 Mhz performance. But cool none the less. I had kinda hoped this was a Cyrix core, but chances of finding one of those...........

Couple of nice MII 333's, nice to find some without the markings damaged and no bent pins either! both work fine, I seem to have rather a lot of 333's now, these seem to me to be the most common MII chips here in the UK today.

Finally this really clean 5x86 100 GP, it really is like new 😀 Planning a build with this one once the motherboard comes in from Bulgaria. These are not common here noe at all, was very happy to get this along with the others for a bundled price.
Best,
Chris

Tetrium - You have quite the load of the silver tops. What are their speed ratings?

Any MII-433GP chips in there?

When u boot up a pc with a ibm 6x86 cpu,what does it say in the post screen ibm or cyrix?

Good question. I don't recall. I know the IBM 5x86c chips read "Cyrix".

BSA Starfire wrote:

Nice collection you have there Tetrium! […]
Show full quote

Nice collection you have there Tetrium!

I forgot to post these few Cyrix beauties I got recently.

IMG_1148.JPG

not really a Cyrix, it's a IDT "samuel" core, but still pretty unusual being 100MHz(all the ones I have seen online have been 133Mhz FSB in this speed grade) and no level 2 cache, must be a pretty early chip. It works fine in my ASUS CUSL2 motherboard, BIOS even recognizes it correctly,it's VERY slow about Celeron 300 Mhz performance. But cool none the less. I had kinda hoped this was a Cyrix core, but chances of finding one of those...........

IMG_1151.JPG

Couple of nice MII 333's, nice to find some without the markings damaged and no bent pins either! both work fine, I seem to have rather a lot of 333's now, these seem to me to be the most common MII chips here in the UK today.

IMG_1152.JPG

Finally this really clean 5x86 100 GP, it really is like new 😀 Planning a build with this one once the motherboard comes in from Bulgaria. These are not common here noe at all, was very happy to get this along with the others for a bundled price.
Best,
Chris

That 5x86 that Phill thinks is too expensive is a really nice chip, I even scored one for $12 shipped last winter.

Cyrix 5x86 chips are still quite cheap on CPU-World compared to eBay, typically around $10-14 USD.

Nahkri wrote:

When u boot up a pc with a ibm 6x86 cpu,what does it say in the post screen ibm or cyrix?

The ECS motherboard I have one of my IBM 6x86MX's in right now says " IBM 6x86/Cyrix MII in the BIOS string.

feipoa wrote:

Cyrix 5x86 chips are still quite cheap on CPU-World compared to eBay, typically around $10-14 USD.

I got all four of the Cyrix chips seen above, plus a intel DX/4 with cooler, AMD DX/4 and a Copermine p3 733, 2 skt370 Mendocinos & a 1.6 northwood for £35 in a bundle, so that worked out at £3.50 each, a price I was very happy with. Cyrix 5x86 100's on ebay are a silly price in UK, £40-£45 each!!!

I installed the 5x86 100GP into the Tomato 4DPS motherboard that arrived from Bulgaria at the weekend, 32MB FPM RAM, SB16 & Diamond stealth S3 Trio. I'm really pleased with it as a pure DOS machine so far.

BSA Starfire wrote:

& Diamond stealth S3 Trio. I'm really pleased with it as a pure DOS machine so far.

Was it that PCI S3 I tossed in the box?

Sounds like a nice build... I find some interesting stuff in the likes of Bulgaria / Ukraine, it used to be a lot cheaper... but some of the guys there figured out they could get more and yanked up the prices.

BSA Starfire wrote:

Nice collection you have there Tetrium!

Cheers!
Took a while too. And I kept all of them, despite their very poor reputation compared to Pentium and Pentium MMX, because I thought they were cool in some way.

BSA Starfire wrote:

I forgot to post these few Cyrix beauties I got recently. […]
Show full quote

I forgot to post these few Cyrix beauties I got recently.

IMG_1148.JPG

not really a Cyrix, it's a IDT "samuel" core, but still pretty unusual being 100MHz(all the ones I have seen online have been 133Mhz FSB in this speed grade) and no level 2 cache, must be a pretty early chip. It works fine in my ASUS CUSL2 motherboard, BIOS even recognizes it correctly,it's VERY slow about Celeron 300 Mhz performance. But cool none the less. I had kinda hoped this was a Cyrix core, but chances of finding one of those...........

IMG_1151.JPG

Couple of nice MII 333's, nice to find some without the markings damaged and no bent pins either! both work fine, I seem to have rather a lot of 333's now, these seem to me to be the most common MII chips here in the UK today.

IMG_1152.JPG

Finally this really clean 5x86 100 GP, it really is like new 😀 Planning a build with this one once the motherboard comes in from Bulgaria. These are not common here noe at all, was very happy to get this along with the others for a bundled price.
Best,
Chris

The only 100MHz FSB C3 part I have, is a 700MHz chip and last time I checked, it wouldn't post (though that might've been an issue with the motherboard).
And in The Netherlands, the most common part I found, was the MII-300 2.9v gold-top chip running at 233MHz.

The 5x86 does seem to at one time have a small fan screwed to its green heatsink. This was fairly common back in those days though, I have one or a couple chips with marks on their integrated heatsink as well.

feipoa wrote:

Tetrium - You have quite the load of the silver tops. What are their speed ratings?

Any MII-433GP chips in there?

All of the silver top chips are 4x66MHz with a 333-rating iirc (I'm fairly sure they have a 4x multi with 66MHz FSB).

And alas, no 433-rated MII in there, only a couple of the less uncommon 400 ones.

Bought an ECS UC-4913 v1.1 socket 3 board with a Cyrix Cx486S-40 FasCache CPU. It's rather peculiar as the Cyrix is attached to what appears to be a socket 3 voltage adapter. You can't see it from the seller's photo unfortunately. Both board and CPU should be running at 5V, so I don't know what the adapter is for?

Image is from the seller's listing.

386_junkie wrote:

BSA Starfire wrote:

& Diamond stealth S3 Trio. I'm really pleased with it as a pure DOS machine so far.

Was it that PCI S3 I tossed in the box?

Sounds like a nice build... I find some interesting stuff in the likes of Bulgaria / Ukraine, it used to be a lot cheaper... but some of the guys there figured out they could get more and yanked up the prices.

Yes it is chap, and the soundblaster 16 from the same package is in there too.
The Amstrad DX/2 is still working away happily, set up and used a few times a week.
Best,
Chris

BSA Starfire wrote:

Yes it is chap, and the soundblaster 16 from the same package is in there too. The Amstrad DX/2 is still working away happily, s […]
Show full quote

386_junkie wrote:

BSA Starfire wrote:

& Diamond stealth S3 Trio. I'm really pleased with it as a pure DOS machine so far.

Was it that PCI S3 I tossed in the box?

Sounds like a nice build... I find some interesting stuff in the likes of Bulgaria / Ukraine, it used to be a lot cheaper... but some of the guys there figured out they could get more and yanked up the prices.

Yes it is chap, and the soundblaster 16 from the same package is in there too.
The Amstrad DX/2 is still working away happily, set up and used a few times a week.
Best,
Chris

Glad to hear, she deserves it.

Regards,

So what's the "official", if there is such a thing, FSB frequency of a 6x86L PR200?

Is it 60 x 2.5 or 75 x 2?

Or is it more a case of what the boards supports?

I think the official frequency is 2 x 75MHz.

http://www.cpu-collection.de/?tn=0&l0=co&l1=C … #6x86L-PR200+GP

F2bnp wrote:

I think the official frequency is 2 x 75MHz.

http://www.cpu-collection.de/?tn=0&l0=co&l1=C … #6x86L-PR200+GP

Good enough for me 😀

I had an 6x86L PR200, it was an 2x 75MHz part. I ran it on a TX chipset board, so it was out of spec officially for the motherboard. I'm still looking for one of those CPU's.

PhilsComputerLab wrote:

So what's the "official", if there is such a thing, FSB frequency of a 6x86L PR200?

Is it 60 x 2.5 or 75 x 2?

Or is it more a case of what the boards supports?

If the 75 MHz gives me trouble I'll just go with 60 MHz. The board supports up to 83 MHz though, so I think I'll be fine.

I think you mean 66 MHz (multiplier 2.5x). Many boards will overclock the PCI bus when the FSB is over 66MHz, so it will depend on you PCI cards as well.

PhilsComputerLab wrote:

If the 75 MHz gives me trouble I'll just go with 60 MHz. The board supports up to 83 MHz though, so I think I'll be fine.

66 x 2.5 is 165, so yea, the 60 x 2.5 gives you the 150 MHz.

Do you have a special 6x86L? I am pretty sure that all Cyrix 6x86 CPUs prior to the 6x86MX series only supported integer multipliers.

EDIT: I am pretty sure the 6x86L-200PR was intended for 75x2.0 systems.