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The rare / unusual CPU club - Page 12

post #111 of 368
Thread Starter 
Ok, a little house cleaning and some updates.

I made a little logo for the club. Nothing too fancy, just a picture of CPU's, both old and new, along with the club name. Will do for now.

I'm also removing the picture of my CPU's from the first post, so the post becomes shorter and I get to be on equal terms with everybody. I will post the picture in here, along with a screenshot I took a few hours ago on the system I still have running the Cyrix 5x86 (100Mhz).

21022011732.jpg

From left to right: Pentium Overdrive 83 Mhz, Cyrix 5x86 120 Mhz, Cyrix 5x86 100 Mhz, AMD 5x86 133 Mhz ADZ model (there is also a more common ADW model).


Cyrix5x862.png


Actually, I hadn't turned it on for more than 700 days, and it still booted and showed the correct time - a few minutes off, that's all. I still don't understand how the lithium battery is holding up after 16 years! And the last 700 days it wasn't even plugged into the outlet! Not that it would make any difference I guess, since the power button is mechanical.

I tried CPU-Z for Windows 98, but unsurprisingly (I checked the supported CPU's list) the only thing it can detect is the fact it's a 1 core CPU and the amount of RAM.

Anyway, the system properties shows Cyrix's unique ID string: CyrixInstead
 
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post #112 of 368
I've got a chip with a missing pin that still works daily. I've also got an entire stack of Pentium II and IIIs, including two PIII 1.0ghz S370 examples.
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post #113 of 368
Thread Starter 
Quote:
Originally Posted by TestECull;13782357 
I've got a chip with a missing pin that still works daily. I've also got an entire stack of Pentium II and IIIs, including two PIII 1.0ghz S370 examples.

What chip is it ? I wonder what that missing pin was for thinking.gif

The PIII 1 Ghz S370 are very nice chips, but I doubt they are rare. I have one, and other users around the forum have one too.

As to the other PII and PIII's you might have something rare.

I wonder if a Pentium II 450 Mhz can be counted as rare ? I once bought one, but it was to actually put in a working system.
 
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post #114 of 368
Quote:
Originally Posted by tpi2007;13782451 
What chip is it ? I wonder what that missing pin was for thinking.gif

The PIII 1 Ghz S370 are very nice chips, but I doubt they are rare. I have one, and other users around the forum have one too.

As to the other PII and PIII's you might have something rare.

I wonder if a Pentium II 450 Mhz can be counted as rare ? I once bought one, but it was to actually put in a working system.

You can break off a fair number of pins on some CPUs and still have them work fine - a good number of them are either floating or grounded to indicate various settings between the CPU and mobo (hence why covering pins works when doing BSEL mods etc). The only difference between Intel's socket 604 & 603 CPUs is 1 dummy pin also - and 603 chips work fine in (most) 604 boards. It's pretty lucky to just have a random pin snap off and have the CPU still work though - should have bought a lottery ticket the day that happened...

The 1GHz chips definitely aren't rare - I have a couple of them, and know of many more systems with them. No idea about the 450MHz chips though.
post #115 of 368
Thread Starter 
Quote:
Originally Posted by the_beast;13782547 
You can break off a fair number of pins on some CPUs and still have them work fine - a good number of them are either floating or grounded to indicate various settings between the CPU and mobo (hence why covering pins works when doing BSEL mods etc). The only difference between Intel's socket 604 & 603 CPUs is 1 dummy pin also - and 603 chips work fine in (most) 604 boards. It's pretty lucky to just have a random pin snap off and have the CPU still work though - should have bought a lottery ticket the day that happened...

The 1GHz chips definitely aren't rare - I have a couple of them, and know of many more systems with them. No idea about the 450MHz chips though.


Yeah, I just wondered what the missing pin on his CPU was for - if it could run 100% or would be less stable under certain circumstances. I once bought a Cyrix 5x86 - the one with a green heatsink (didn't show it on the picture I took), and it had a missing, broken pin. Unfortunately it doesn't work without it.

Btw, thanks for the info on Intel's sockets 604 & 603! Rep+

By the way, I found these 2 interesting articles on Tom's Hardware from 2004, where they present a timeline (not complete, but interesting nonethelesss) of Intel and AMD CPU's.

When they talk about the Pentium 3, they say the following:
Quote:
Still, to use the Tualatin CPUs, a new chipset with so-called T-stepping was necessary. But it gets even easier: With some skill, a modification can be made so that the CPU can also be used in a conventional BX board. It looks like this in detail: Pins AN3, AK4 and AJ3 are isolated so that they have no electrical connection to the socket. In most motherboards it is necessary to connect Pin AK4 with AK26; a simple jumper does this with just a few motions. Now only pins AM34, AL35 and AL37 as well as AK36 are connected to one another.
Source.

eek.gif

How about that ?
Edited by tpi2007 - 6/7/11 at 5:24am
 
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post #116 of 368
yeah, the p3 1.0's aren't rare by any means. In fact, there were a lot produced because that was the fastest pentium 3 coppermine that most motherboards would accept, and would be the best upgrade for those boards. There were a couple different pentium 3 1.0's produced. There was a coppermine without an IHS, then the Coppermine-T which had the electrical pinouts of the tualatins and had the tualatin IHS, but they were the old coppermine cores that would run on both tualatin and coppermine boards. I have three of the 1.0 Coppermine-T processors, and a coppermine.

As for pinouts, I've heard of a bunch of mods for these. I have tried my hand at a few, but have been pretty unsuccessful.
Edited by slngsht - 6/7/11 at 5:35am
post #117 of 368
Quote:
Originally Posted by tpi2007;13782173 
Hi there! Hmmm, it was expensive at launch, but there are quite a few for sale on ebay, and not for rare prices. I have my doubts that it qualifies as rare. But it's the best CPU for socket A, that is a fact!
Quote:
Originally Posted by the_beast;13782224 
That 3200+ would only count as rare on overclocking websites - because no serious overclocker would ever buy one. Everyone just bought the 2500 with the same core but crippled on a 333MHz (effective) bus, and overclocked it to run the same as the 3200 for a fraction of the price...

The 2500 sold so well as a result AMD (allegedly) started re-binning many of the chips to match demand, meaning the 2.2GHz clock of the 3200 was all but guaranteed on the Barton core.
Quote:
Originally Posted by tpi2007;13782272 
Thanks for the info the_beast! It's great to have a guy who knows AMD history around thumb.gif

Barton core that does 400 FSB was one of the hardest cpu you could find when it was release. Barton core that does 333 FSB was common and still common today. Look for Barton core that 400 FSB is still hard to find today.
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post #118 of 368
Quote:
Originally Posted by tpi2007;13782201 
Now THAT is rare!

I'm going to add it to the examples list. But... did you sell it ? I can't add you as an owner then frown.gif

But thanks for the info, that is one prime example of a rare CPU!

Edit: added your name to the OP and a link to this post to thank you for the reminder!

Chill.ʇɔǝɟɟ3 has it now and she is on OCN.
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post #119 of 368
Quote:
Originally Posted by dixson01974;13783549 
Barton core that does 400 FSB was one of the hardest cpu you could find when it was release. Barton core that does 333 FSB was common and still common today. Look for Barton core that 400 FSB is still hard to find today.

Not in the UK - it was harder to get hold of the 2500 with the 333MHz bus.

I know, because I built 7 or 8 systems with them for friends/relatives and OC'ed them all to 3200 quite. Took a bit of hunting to get hold of the 2500 for decent prices, but the 3200 straight was in stock all over the place because nobody bought it.
post #120 of 368
Quote:
Originally Posted by the_beast;13783614 
Not in the UK - it was harder to get hold of the 2500 with the 333MHz bus.

I know, because I built 7 or 8 systems with them for friends/relatives and OC'ed them all to 3200 quite. Took a bit of hunting to get hold of the 2500 for decent prices, but the 3200 straight was in stock all over the place because nobody bought it.

Ok. It was hard to find any Socket A 400 FSB cpus in the US and easier to find any Socket A any 266 and 333 FSB cpus. I own both 2500 (333FSB) and 3200(400FSB). Which I still have the 3200(400FSB).
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