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The rare / unusual CPU club - Page 11

post #101 of 368
Thread Starter 
Quote:
Originally Posted by TonyLee;13613069 
Did anyone here ever own a mobile Pentium (I) 266 or 300 mmx?

Regarding the 80186 in the op, wasn't that an embedded cpu? I have never heard of the 80188.

The 80186 was primarily designed to work as a microcontroller in embedded systems, but it did end up being sold as the main CPU in a few computers. Check the Wikipedia article for reference. The 80188 was basically the same chip, but with a cheaper to implement 8-bit external data bus, just like the 8088 was to the 8086.
Quote:
Originally Posted by Monocog007;13665639 
Intel i486 Dx2 is FTW. 33Mhz, and some computers supported "overclocking" by moving a jumper on the mobo to make it run at like 40Mhz.

Not quite right. The 486 DX2 was a clock doubled CPU. The previous 486DX ran at 33Mhz, with an external 33 Mhz bus. But since increasing the external bus speed was complicated, they decided to apply a multiplier and design a chip that would run at x times the speed of the external bus. At this time the L1 cache became important.

The 486 DX2 ran at twice the speed of the external bus (that is what the "2" in DX2 stands for), hence at 66 Mhz. Some PC's used a button to make the CPU run at it's full 66 Mhz speed or at 33 Mhz. It was not overclocking. You may be referring to some odd motherboards that supported non conventional bus speeds, like those that supported certain AMD and Cyrix CPU's. Those would actually run with a 40 Mhz bus speed as standard. You also had some expensive boards with a 50 Mhz bus speed, and a 486DX running at 50 Mhz to match.
Quote:
Originally Posted by HybridCore;13665661 
Would engineering samples be counted as rare? I don't have one but I know some people have a couple for Bulldozer. I'm pretty sure one of them is here on OCN.

I guess they would, but I would also guess the people you know won't come here showing them, otherwise they will be in trouble wink.gif
Edited by tpi2007 - 5/28/11 at 11:51am
 
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post #102 of 368
Quote:
Originally Posted by tpi2007;13667518 
Not quite right. The 486 DX2 was a clock doubled CPU. The previous 486DX ran at 33Mhz, with an external 33 Mhz bus. But since increasing the external bus speed was complicated, they decided to apply a multiplier and design a chip that would run at x times the speed of the external bus. At this time the L1 cache became important.

The 486 DX2 ran at twice the speed of the external bus (that is what the "2" in DX2 stands for), hence at 66 Mhz. Some PC's used a button to make the CPU run at it's full 66 Mhz speed or at 33 Mhz. It was not overclocking. You may be referring to some odd motherboards that supported non conventional bus speeds, like those that supported certain AMD and Cyrix CPU's. Those would actually run with a 40 Mhz bus speed as standard. You also had some expensive boards with a 50 Mhz bus speed, and a 486DX running at 50 Mhz to match.

My bad! I had found this thing in an old scrap equipment tool at my father's work that he had brought home in the back of his truck so we could take the aluminum. Being 16, i wasn't around when this thing was new (or even close to it) so i only did a small bit of research. I'm glad you corrected me though. wink.gif
post #103 of 368
Thread Starter 
Quote:
Originally Posted by Monocog007;13743240 
My bad! I had found this thing in an old scrap equipment tool at my father's work that he had brought home in the back of his truck so we could take the aluminum. Being 16, i wasn't around when this thing was new (or even close to it) so i only did a small bit of research. I'm glad you corrected me though. wink.gif


You're welcome!


By the way, to everybody: I just updated the CPU list with another unusual CPU example, Intel's fastest CPU to date:

- Xeon X5698 4.4 Ghz, 12Mb L3, 32nm, Dual Core w/HT, Socket 1366.


From what I've read, this is another built to specification CPU, much like the 2.8 Ghz Pentium 4 with 400 Mhz FSB. Some banks need a fast CPU for software optimized for 2 cores. Since these CPU's are going into mission critical operations, homemade overclocking is not an option, so the price they pay Intel includes the guarantee it works at that high clockspeed at stock.
 
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post #104 of 368
Will an Ahtlon Xp 3200+ with the FSB of 400 rare enough for you guys and gals. They was rare when AMD release them in the first place.
Edited by dixson01974 - 6/7/11 at 3:18am
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post #105 of 368
My rig laughs at all you puny x86 users!


...can I join the club with my PowerPC 7450? It's a fairly unusual CPU around here I'd say.
Just how to get a validation?
post #106 of 368
Quote:
Originally Posted by crust_cheese;13782097 
My rig laughs at all you puny x86 users!


...can I join the club with my PowerPC 7450? It's a fairly unusual CPU around here I'd say.
Just how to get a validation?

I had an AMD Phenom II X4 TWKR. That is about as rare that you can get. Now it has a new home.
Edited by dixson01974 - 6/7/11 at 3:28am
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post #107 of 368
Thread Starter 
Quote:
Originally Posted by dixson01974;13782088 
Will an Ahtlon Xp 3200+ with the FSB of 400 rare enough for you guys and gals. They was rare when AMD release them in the first place.

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 crust_cheese;13782097 
My rig laughs at all you puny x86 users!


...can I join the club with my PowerPC 7450? It's a fairly unusual CPU around here I'd say.
Just how to get a validation?

Hi! Hmm, a PowerMac G4 and corresponding CPU might have been expensive when new, but I don't think it qualifies as rare. Unless that CPU model in particular is rare. I'm not familiar with it, so any more info is welcome!
 
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post #108 of 368
Thread Starter 
Quote:
Originally Posted by dixson01974;13782116 
I had an AMD Phenom II X4 TWKR. That is about as rare that you can get. Now it has a new home.

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!
Edited by tpi2007 - 6/7/11 at 4:54am
 
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post #109 of 368
Quote:
Originally Posted by dixson01974;13782088 
Will an Ahtlon Xp 3200+ with the FSB of 400 rare enough for you guys and gals. They was rare when AMD release them in the first place.

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.
post #110 of 368
Thread Starter 
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.


Thanks for the info the_beast! It's great to have a guy who knows AMD history around thumb.gif
 
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