I don't really collect Processors, but over time have obtained a few uncommon ones to play around with.

A 225MHz Winchip C6.
Two types of low voltage Cyrix 6x86/MII's.
VIA Socket 370-T C3 Ezra-T 1.0GHz, week 42 / 2002
VIA Socket 370-T C3 Nehemiah 1.2GHz, week 34 / 2006! (only special because of the year)
Intel Slot 1 QH31ES 750 MHz, unlocked multiplier
Intel Socket 370-T QEL8ES 1266 MHz, unlocked multiplier
Intel Socket 370-T QID2QS 1400 MHz, unlocked multiplier

Also I have here the weird Pentium III 533EB (4x133MHz) in both slot 1 and socket 370 form. (not pictured)

Still missing a few interesting ones, Like the Winchip 2, Rise MP6 and Cx5x86-120GP that Feipoa showed earlier....

I never thought about it, but some of my daily computers have some weird chips in them--I have a working Neoware thin client that uses the Via Eden at 1Ghz, I have an old HP system I'm using as a file server and it's a P2-300. I also have a 486sx laptop, some older Toshibas and a winbook xp5 that used to boot perfectly (can't find boot disk error) that has a pentium 90 in it.

The CPUs arrived today. 72 in all -- not all of them are CPUs, actually. They were about $1.40 apiece, so I couldn't really pass them up. Nothing too rare, I don't think, and they're kind of dirty. Nice to have such a variety, though. I'll probably keep one of each model and sell the rest. Lots of bent pins, however.

Nice haul!

Is the Pentium in the top photo, bottom row middle, a P60?

The 5x86 and Blue Lightning are also nice.

Samir wrote:

boxpressed wrote:

I just purchased a large lot of 70+ 386/486/586 class CPUs, mostly Intel, but some Cyrix and AMD.

Are some Intel 486 SX/DX/DX2 models more rare/collectable than others?

The 486dx-50 (not dx2-50) was quite rare. This is because the clock ran at 50Mhz rather than being 25Mhz and then doubled internally. It was on par with the performance of a 486dx2-66.

That's actually an urban legend.
I'll post my numbers this evening.

There's good stuff.
P60, 5x86, i486 without X or SX markings ...
Nice lot, really nice 😀

I do not consider these two as something super-rare or anything. They are just the two oldest in my collection.

Socket 3 IBM 5x86C 100 MHz - i think it could be considered pretty rare?

This thread has been so educational. IDT, RISE, and Eagle Memories are manufacturers I never knew existed. I also didn't know IBM had/has an x86 license. Imagine a world where there are more than just Intel, AMD, and VIA making competitive CPUs. Much innovation would happen!

These are my less common socket 7 chips, I REALLY want to get a RISE mP6 sometime soon, Winchip2 is also on the wants list 😀

boxpressed wrote:

I just purchased a large lot of 70+ 386/486/586 class CPUs, mostly Intel, but some Cyrix and AMD.

Are some Intel 486 SX/DX/DX2 models more rare/collectable than others?

486SX-16 is hard to find. The 80487 is also not too common. Most of the time when an 80487 comes up, it's sealed in box. I did see a loose one on ebay in the last year, but the seller wanted what a sealed box goes for.

BSA Starfire wrote:

cpu 002.jpg

These are my less common socket 7 chips, I REALLY want to get a RISE mP6 sometime soon, Winchip2 is also on the wants list 😀

Those 200mhz Winchips seem to be falling in price on ebay lately. I've seen them for $12-$13 with shipping already. I guess there's a lot more of them out there than people originally thought. If you should see a 225 or 240mhz version, for the same price or just slightly more than the 200mhz, I'd grab as many as the seller has. Those seem to be a bit more scarce. Winchip2 is definitely one to grab, too. There was a seller who had a 233mhz for sale for $50 for the longest time, and then everyone who had one started listing them for $50 but I don't think any of them actually sold for that much. Winchip and WInchip2 are found in Evergreen upgrades but it's hard to spot them sometimes because they usually have a socket interposer and fan mounted on them. If it says something like 200MX or MX200 on the fan, then that's a Winchip.

Nowhere near as exotic as some of the chips you guys have been posting, but I have an Athlon XP 3100+. It runs at 2.2GHz (11x200), so it's basically a 3200+ with only half the L2 cache.

I also have a Core 2 Quad Q6400 running at a mere 2.13GHz.

Not rare but of mine I like: Am386DX-40 best cpu ever 😁, Overdrive DX2 66Mhz with heatsink, Overdrive DX4 100Mhz 5v with heatsink/regulator, the K6-233 3.2v, K62-300/66Mhz, the usual Barton 3200+/400.

When Intel needs to relabel because flaws were found...

Don't know how rare it is, but I just bought a Kendall Square Research KSR1 (64-bit RISC 20MHz)

feipoa wrote:

Attached are some less common, harder to find, or rare chips in my collection.

Wow I thought the last Cyrix MII was the 366. There actually were 433MHz models made in tiny numbers? The Red Hill Tech website said the 433 was never made. 😕

http://www.redhill.net.au/c/c-c.html

As for my own rare cpus, I have an Athlon XP 1500+ (said to be mainly just a paper part)
and I have Cyrix MII at 366 and I once owned a MII 300. I also have an AMD 486DX 40. I don't know if any of these cpus I own are actually rare or not. Oh, and I also own two Pentium III Katmai 600's which I think are rare too. Personally, I don't collect cpus if I don't intend on using them. That's what Ebays for. I still have a bunch of computers to get rid of that I don't use.

gerwin wrote:

I don't really collect Processors, but over time have obtained a few uncommon ones to play around with. […]
Show full quote

I don't really collect Processors, but over time have obtained a few uncommon ones to play around with.

A 225MHz Winchip C6.
Two types of low voltage Cyrix 6x86/MII's.
VIA Socket 370-T C3 Ezra-T 1.0GHz, week 42 / 2002
VIA Socket 370-T C3 Nehemiah 1.2GHz, week 34 / 2006! (only special because of the year)
Intel Slot 1 QH31ES 750 MHz, unlocked multiplier
Intel Socket 370-T QEL8ES 1266 MHz, unlocked multiplier
Intel Socket 370-T QID2QS 1400 MHz, unlocked multiplier

Also I have here the weird Pentium III 533EB (4x133MHz) in both slot 1 and socket 370 form. (not pictured)

Still missing a few interesting ones, Like the Winchip 2, Rise MP6 and Cx5x86-120GP that Feipoa showed earlier....

You know what they say: The faster a cpu runs, the longer it has to wait for the main memory. So your Pentium III 533 must have been super fast clock per clock due to it's 133mhz bus speed!

Never heard of the Blue Lightning before or the i960 part - that one's got an interesting place in history.

Are we going to see an epic benchmark project out of this?

computergeek92 wrote:

gerwin wrote:

Also I have here the weird Pentium III 533EB (4x133MHz) in both slot 1 and socket 370 form.

You know what they say: The faster a cpu runs, the longer it has to wait for the main memory. So your Pentium III 533 must have been super fast clock per clock due to it's 133mhz bus speed!

Supposedly yes. I tested it before in Quake 640x480: 4x133=533MHz gives 67,5 FPS, whereas another CPU at 8x66=533MHz would give 55,7 FPS. Mainly the 533EB is a cheap CPU to run fanless. Once undervolted to 1,3V it should not get hot, especially with a lower Bus speed of 100MHz.

BSA Starfire wrote:

These are my less common socket 7 chips, I REALLY want to get a RISE mP6 sometime soon, Winchip2 is also on the wants list 😀

In appearance GoldCap CPUs are beautiful things. 😀 Especially the Cyrix ones and the Pentium Classic.

Rise mP6 is dog though, cannot really convince myself to pay much for a CPU that does not have anything going for it, besides its obscurity.

elianda wrote:

When Intel needs to relabel because flaws were found...

That one has a nice background story. Good find.

computergeek92 wrote:

Wow I thought the last Cyrix MII was the 366. There actually were 433MHz models made in tiny numbers? The Red Hill Tech website […]
Show full quote

feipoa wrote:

Attached are some less common, harder to find, or rare chips in my collection.

Wow I thought the last Cyrix MII was the 366. There actually were 433MHz models made in tiny numbers? The Red Hill Tech website said the 433 was never made. 😕

http://www.redhill.net.au/c/c-c.html

As for my own rare cpus, I have an Athlon XP 1500+ (said to be mainly just a paper part)
and I have Cyrix MII at 366 and I once owned a MII 300. I also have an AMD 486DX 40. I don't know if any of these cpus I own are actually rare or not. Oh, and I also own two Pentium III Katmai 600's which I think are rare too. Personally, I don't collect cpus if I don't intend on using them. That's what Ebays for. I still have a bunch of computers to get rid of that I don't use.

I have two of the 400GP, haven't seen a 433GP for sale anywhere yet. They don't actually run at that speed, though. That's a P-rating but even using a P-rating it still doesn't come close to running at the speed they claim. A 433mhz Celeron would probably be about 1.8x faster than a MII 433GP from the integer tests I've seen and forget about floating point.

gerwin wrote:

Rise mP6 is dog though, cannot really convince myself to pay much for a CPU that does not have anything going for it, besides its obscurity.

Rise MP6 isn't quite as bad as some other budget chips. It actually has three MMX execution units, so it can burn through those instructions really fast which helps to somewhat offset the weak FPU in games. The fastest one was 250mhz actual with a 366 P-rating but, as with Cyrix MII, don't take the P-rating too literally.