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First post, by Kahenraz

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Someone I purchased from recently sent me a photo of a bunch of processors that appear to be mostly 486 and early Pentium-class CPUs and asked if I was interested in any of them. I don't collect desktop parts earlier than ATX which leaves out the 486 processors. And none of the Pentium-class CPUs looked particularly interesting.

The only thing that stood out was the Pentium Overdrive but I don't think the ones here are anything special; it's hard to tell but I think they are meant for a 486 socket as well. There are some Cyrix processors but I can't see any reason to use one and I don't plan on ever collecting them.

Can anyone spot anything here that is worth buying?

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Reply 1 of 18, by Caluser2000

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Depends on what you are interested in. I'd personally grab all the overdrives, 200mmx +s, AMDs, and Cyrix cpus.

There's a glitch in the matrix.
A founding member of the 286 appreciation society.
Apparently 32-bit is dead and nobody likes P4s.
Of course, as always, I'm open to correction...😉

Reply 2 of 18, by Gmlb256

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Same as Caluser2000 said, Socket 7 is my favorite platform.

Also there is a P4 CPU for Socket 423 and two AMD K7-based CPUs in that collection.

VIA C3 Nehemiah 1.2A @ 1.46 GHz | ASUS P2-99 | 256 MB PC133 SDRAM | GeForce3 Ti 200 64 MB | Voodoo2 12 MB | SBLive! | AWE64 | SBPro2 | GUS

Reply 3 of 18, by BitWrangler

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At a buck each I'd take all of them, at $5 each I'd take the MII-366 and the two overdrives, but I ain't really motivated to buy otherwise, even though they all go for $15 and up on eBay these days. However if you're looking for things that could potentially go in ATX boards in future, row 1: 4 and 5 ... row 2 and 3: 2,3,4,5. though I guess the pentiums will work in those s7 ATX boards too, but *yawn*.

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Reply 4 of 18, by rmay635703

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Although of zero interest to you the DX50 is uncommon

That non bespoke 286 could be interesting depending on its speed grade (4mhz and 25mhz are the most interesting)

High clocking of Cyrix are uncommon
200mhz + Pentiums of any flavor are practical

The newer stuff is up to you, P4 is pretty worthless for me but if you have proper boards, etc why not.

Really depends what you are hoping to get out of this.

And chips don’t exactly take up loads of space so it comes down to cost, if they are almost free or very cheap your not out much.

If they are more expensive you got to figure out if you will use it and what the market value is.

Reply 5 of 18, by drosse1meyer

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I like the colored anodized heatsinks 😀

What is that tiny chip in the bottom row?

P1: Packard Bell - 233 MMX, Voodoo1, 64 MB, ALS100+
P2-V2: Dell Dimension - 400 Mhz, Voodoo2, 256 MB
P!!! Custom: 1 Ghz, GeForce2 Pro/64MB, 384 MB

Reply 6 of 18, by BitWrangler

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Might be a dustcap for a 387 socket.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 8 of 18, by retardware

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rmay635703 wrote on 2021-09-04, 19:52:

Although of zero interest to you the DX50 is uncommon

And useful!
If you have such one, keep it for mobo testing.

Reply 9 of 18, by Kahenraz

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I made an offer for these and they arrived a few days later. I only had a single K6 for my Socket 7 and decided that a few more plus some extras seemed reasonable.

The title of the listing makes me feel like an archeologist. "Ancient Bundle"?

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Last edited by Kahenraz on 2021-09-09, 05:31. Edited 2 times in total.

Reply 10 of 18, by drosse1meyer

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pretty good deal for $20

P1: Packard Bell - 233 MMX, Voodoo1, 64 MB, ALS100+
P2-V2: Dell Dimension - 400 Mhz, Voodoo2, 256 MB
P!!! Custom: 1 Ghz, GeForce2 Pro/64MB, 384 MB

Reply 11 of 18, by Kahenraz

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The tiny chip from the bottom row is a socketed 8 Mhz 286.

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Reply 13 of 18, by Kahenraz

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There is an Intel 486 DX2-66 Overdrive and a Socket 7 Pentiun Overdrive. The Pentium Overdrive is marked as a Pentium MMX SL24W.

What makes some Pentium Overdrives command a high list price on eBay? What makes an Overdrive desirable when there are plenty of other cheap Pentiums available for Socket 7? The integrated fan would be less desirable I think because it's not replaceable.

I think the Pentium Overdrive would be more interesting if it could be dropped into a 486. But for Socket 7 it doesn't seem very useful.

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Reply 14 of 18, by BitWrangler

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Possibly you can stick that Pentium overdrive in a socket 5 board that otherwise maxes out at 120, but you'd have to check it out. The DX2 overdrive, well, I never saw a point in those, every DX33 board I've met will take a 5V DX2, must be some reason for it's existence, easier for OEM systems? I dunno.

edit: oh yah, regulator should be on board that pentium OD, so it will upgrade single plane socket 7 boards to mmx that only take p54, like most 430FX and some early HX, VX and TX though all those are more likely overall to support MMX native.

edit2: Doh, today I am just remembering that boards with soldered down CPU exist with an upgrade socket that will only take an overdrive with it's extra "check max spend occurred" pin.

Last edited by BitWrangler on 2021-09-11, 11:53. Edited 2 times in total.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 15 of 18, by Gmlb256

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The Pentium MMX OverDrive CPU is only useful on early Pentium motherboards are unable to supply the necessary voltages for a non-OverDrive Pentium MMX. There are also Pentium OverDrive CPUs for 486 motherboards that can support this adequately.

VIA C3 Nehemiah 1.2A @ 1.46 GHz | ASUS P2-99 | 256 MB PC133 SDRAM | GeForce3 Ti 200 64 MB | Voodoo2 12 MB | SBLive! | AWE64 | SBPro2 | GUS

Reply 16 of 18, by Tetrium

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Gmlb256 wrote on 2021-09-09, 02:53:

The Pentium MMX OverDrive CPU is only useful on early Pentium motherboards are unable to supply the necessary voltages for a non-OverDrive Pentium MMX. There are also Pentium OverDrive CPUs for 486 motherboards that can support this adequately.

Could perhaps be interesting in some experiments using the disabled fan to underclock it?
Though I am unsure how the s5 PODs are affected.

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My retro rigs (old topic)
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Reply 17 of 18, by Gmlb256

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Tetrium wrote on 2021-09-09, 21:16:

Could perhaps be interesting in some experiments using the disabled fan to underclock it?
Though I am unsure how the s5 PODs are affected.

Sadly I don't have any OverDrive CPUs to do this experiment. 🙁

If the CPU has the multiplier unlocked downwards then it's possible to underclock it, even more with the FSB set to 50 MHz. The only Pentium CPU where I did underclocking was a normal P233MMX (1.5x multiplier not available due to being actually 3.5x) by changing the multipliers and FSB on a Socket 7 motherboard.

VIA C3 Nehemiah 1.2A @ 1.46 GHz | ASUS P2-99 | 256 MB PC133 SDRAM | GeForce3 Ti 200 64 MB | Voodoo2 12 MB | SBLive! | AWE64 | SBPro2 | GUS

Reply 18 of 18, by DJMadMax

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Uh, great find, great deal! Enjoy your stuff, there's definitely nothing "crappy" in it. Each of those processors tells its own story and has its own charme. Depending on it's task area there is not one useless processor in this lot. Kudos! 😀