Rarest CPUs?

Discussion about old PC hardware.

Rarest CPUs?

Postby harddrivespin » 2017-12-17 @ 16:27

Just something interesting to think about- I know that the Cx5x86 120mhz is fairly rare, and that the Cx5x86 133mhz is far rarer (not sure if it made it out of the prototype stage) and the Intel TQ80486DX4100, which was a i486DX4-100 made for the military and one is known to exist. Any thoughts/ideas?
User avatar
harddrivespin
Member
 
Posts: 122
Joined: 2017-8-16 @ 20:36

Re: Rarest CPUs?

Postby Koltoroc » 2017-12-17 @ 18:45

The UMC 486 with FPU and the clock doubled versions are exceedingly rare, the clock doubled is rare enough to be a contender for rarest CPU.
Koltoroc
Member
 
Posts: 194
Joined: 2016-10-07 @ 23:21

Re: Rarest CPUs?

Postby BeginnerGuy » 2017-12-17 @ 19:20

AMD K5-200 remains at the top of my list :blah:
Sup. I like computers. Are you a computer?
User avatar
BeginnerGuy
Oldbie
 
Posts: 520
Joined: 2016-12-19 @ 08:32
Location: North Carolina, US

Re: Rarest CPUs?

Postby elianda » 2017-12-17 @ 20:49

How about Nx686 ?
Retronn.de - Vintage Hardware Gallery, Drivers, Guides, HQ Videos.
Youtube Channel
FTP Server - Driver Archive and more
DVI2PCIe alignment and 2D image quality measurement tool
User avatar
elianda
l33t
 
Posts: 2215
Joined: 2006-4-21 @ 16:56
Location: Halle / Germany

Re: Rarest CPUs?

Postby Koltoroc » 2017-12-17 @ 21:23

elianda wrote:How about Nx686 ?


That is actually a really common CPU. It is also called the AMD K6. Nexgen was in the design process when AMD bought them.
Koltoroc
Member
 
Posts: 194
Joined: 2016-10-07 @ 23:21

Re: Rarest CPUs?

Postby JidaiGeki » 2017-12-17 @ 23:19

Is the withdrawn PIII-1.13 Coppermine rare, or did a lot of them stay out there in the wild?
JidaiGeki
Member
 
Posts: 389
Joined: 2010-12-22 @ 14:11

Re: Rarest CPUs?

Postby noshutdown » 2017-12-18 @ 07:16

JidaiGeki wrote:Is the withdrawn PIII-1.13 Coppermine rare, or did a lot of them stay out there in the wild?


i think they are extremely rare. they were supplied to oem only, so they were easily recalled without leaking, save for a few test samples given to media which they kept as evidence and denied to return.
noshutdown
Oldbie
 
Posts: 947
Joined: 2010-7-23 @ 17:04
Location: China

Re: Rarest CPUs?

Postby noshutdown » 2017-12-18 @ 07:19

BeginnerGuy wrote:AMD K5-200 remains at the top of my list :blah:

k5-pr200 may be difficult for some people to obtain, but at least it did hit the market in some places, so its not going very high on the rank.
noshutdown
Oldbie
 
Posts: 947
Joined: 2010-7-23 @ 17:04
Location: China

Re: Rarest CPUs?

Postby jesolo » 2017-12-18 @ 07:21

Koltoroc wrote:
elianda wrote:How about Nx686 ?


That is actually a really common CPU. It is also called the AMD K6. Nexgen was in the design process when AMD bought them.

I think that elianda probably meant Nx586. There never was a Nexgen 686 CPU.
Another CPU that comes to mind is the Cyrix 486DRu2 & 486DRx2 and also the TI486SXL2.
User avatar
jesolo
Oldbie
 
Posts: 1331
Joined: 2014-6-24 @ 19:04
Location: South Africa

Re: Rarest CPUs?

Postby elianda » 2017-12-18 @ 08:00

I actually meant the Nx686: Image
Retronn.de - Vintage Hardware Gallery, Drivers, Guides, HQ Videos.
Youtube Channel
FTP Server - Driver Archive and more
DVI2PCIe alignment and 2D image quality measurement tool
User avatar
elianda
l33t
 
Posts: 2215
Joined: 2006-4-21 @ 16:56
Location: Halle / Germany

Re: Rarest CPUs?

Postby jesolo » 2017-12-18 @ 08:12

elianda wrote:I actually meant the Nx686: Image

I wasn't aware that this CPU was actually available. Always thought that this was just in the development stages when AMD acquired NexGen but, quite interesting.
User avatar
jesolo
Oldbie
 
Posts: 1331
Joined: 2014-6-24 @ 19:04
Location: South Africa

Re: Rarest CPUs?

Postby havli » 2017-12-18 @ 13:12

How about Cyrix III with Joshua core?
Also Socket A Athlon Thunderbird built on OPGA package (instead of CPGA) is quite rare.
HW museum.cz - my collection of PC hardware
User avatar
havli
Oldbie
 
Posts: 662
Joined: 2014-11-07 @ 16:51
Location: Czech Republic

Re: Rarest CPUs?

Postby Anonymous Coward » 2017-12-18 @ 13:22

Cyrix 486DRu2 & 486DRx2 and also the TI486SXL2.


DRx2 and SXL2 are uncommon, not rare.

The DRu2 might be rare though. It's actually not a CPU, but a kit that consists of a regular 486DLC and a clock doubling interposer that fits underneath.
Will the highways on the internets become more few?
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium
User avatar
Anonymous Coward
l33t
 
Posts: 2670
Joined: 2008-3-20 @ 05:37
Location: Shandong, China

Re: Rarest CPUs?

Postby BeginnerGuy » 2017-12-18 @ 13:37

noshutdown wrote:
BeginnerGuy wrote:AMD K5-200 remains at the top of my list :blah:

k5-pr200 may be difficult for some people to obtain, but at least it did hit the market in some places, so its not going very high on the rank.


My line of thinking is ultra rare cpu that I'm sure exists. I'm not sure what would be the rarest cpu that someone, somewhere has that us mortals will never see.
Sup. I like computers. Are you a computer?
User avatar
BeginnerGuy
Oldbie
 
Posts: 520
Joined: 2016-12-19 @ 08:32
Location: North Carolina, US

Re: Rarest CPUs?

Postby Koltoroc » 2017-12-18 @ 15:29

jesolo wrote:
elianda wrote:I actually meant the Nx686: Image

I wasn't aware that this CPU was actually available. Always thought that this was just in the development stages when AMD acquired NexGen but, quite interesting.


It was never produced. There may be a handful of engineering samples or mockups, not sure which, but they were never sold as the NX686.
Koltoroc
Member
 
Posts: 194
Joined: 2016-10-07 @ 23:21

Re: Rarest CPUs?

Postby Jo22 » 2017-12-18 @ 18:23

"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//
User avatar
Jo22
l33t
 
Posts: 2454
Joined: 2009-12-13 @ 07:06
Location: Europe

Re: Rarest CPUs?

Postby harddrivespin » 2017-12-22 @ 12:35

Well, this website: http://rarecpus.com/ is certainly useful by the looks of it.
User avatar
harddrivespin
Member
 
Posts: 122
Joined: 2017-8-16 @ 20:36

Re: Rarest CPUs?

Postby p24t » 2017-12-22 @ 12:39

I think the 486/Pentium overdrive processors are fairly rare. I believe there were 63 and 83MHz versions to upgrade certain 486 systems.
p24t
Newbie
 
Posts: 25
Joined: 2016-2-23 @ 19:49

Re: Rarest CPUs?

Postby elianda » 2017-12-22 @ 12:48

harddrivespin wrote:Well, this website: http://rarecpus.com/ is certainly useful by the looks of it.


Except that 90% of the rare CPUs listed there are engineering or qualification samples.
Retronn.de - Vintage Hardware Gallery, Drivers, Guides, HQ Videos.
Youtube Channel
FTP Server - Driver Archive and more
DVI2PCIe alignment and 2D image quality measurement tool
User avatar
elianda
l33t
 
Posts: 2215
Joined: 2006-4-21 @ 16:56
Location: Halle / Germany

Re: Rarest CPUs?

Postby harddrivespin » 2017-12-22 @ 21:17

-_-
User avatar
harddrivespin
Member
 
Posts: 122
Joined: 2017-8-16 @ 20:36

Next

Return to General Old Hardware

Who is online

Users browsing this forum: cxm717, tayyare and 9 guests