VOGONS


First post, by feipoa

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1) What is rarer? Rank them in order of rarity and note why you chose this ordering. [Marked chips only, not overclocked units.]

Cyrix 5x86-133GP
AMD K5-PR200
Cyrix MII-433GP
AMD X5-160 ADZ

2) Assuming you do not own any these, which chip would you want the most and why?

3) How much do you think each chip is worth? Meaning, if you tried to sell each chip online for a 2 year period, what is the maximum amount you think someone might pay?

Plan your life wisely, you'll be dead before you know it.

Reply 1 of 58, by nemesis

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From my observations it would be:
cyrix 133
amd 160
cyrix 433
amd 200

Cyrix 5x86 133GP... just to see how it would stack up against my Cyrix 5x86 150.

As far as prices, I've only seen one Cyrix 133 sell and that was for 50usd iirc and it came with a motherboard and ram.
Doubt I'll ever see that at that price ever again though...
The others I've seen vary from 69usd to 191usd.

(Rarity based on my observations on ebay, ebid, and private listings).

Reply 3 of 58, by feipoa

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Yes. They were probably released to markets which were thought to not interfere with AMD K5 sales, the logic being that such markets (typically those with a low GDP) could never afford an AMD K5 anyway.

AMD X5-160
http://www.chipdb.org/cat-160-24.htm

AMD X5-150
http://www.chipdb.org/cat-150-23.htm

There have been reports of users stably overclocking an officially marked X5-160 to 200 MHz, which according to U4BC, is like a P110.

Plan your life wisely, you'll be dead before you know it.

Reply 4 of 58, by noshutdown

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yeah whatever, i still wonder whether they are just remarked ones instead of being officially released by amd. cause the PR rating standard is 5x86-133=p75, so 160(20% higher) would be comparable to p90.
and for the two "5x86-160" cpus, one is still rated as p75, while the other is rated as p100, which appears really unreasonable. the printed fonts of "160" digits may seem a bit odd to me, too.
and you havn't explained, how amd could guarantee this cpu to run on most motherboards that didn't support fsb above 33, while x5-133 never needed to concern about this.

Last edited by noshutdown on 2011-12-12, 06:34. Edited 1 time in total.

Reply 5 of 58, by feipoa

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I don't think AMD did guarantee that the 160 MHz version would run at this speed in a non-33MHz-supporting motherboard. Most 486 motherboards made from 1994-1997 support a 40 MHz FSB. These chips were probably intended for new systems.

There were other AMD chips which were officially released that run on a 40 MHz FSB. To name a few: AMD DX2-80, AMD DX4-120.

You could also add a custom PLL circuit on a socket3 adapter (such as in an upgrade kit) to run close to 160 MHz on a non 40 MHz FSB system.

Plan your life wisely, you'll be dead before you know it.

Reply 6 of 58, by iguana_kiev

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Hi 😀

1) 5x86-133GP and MII-433GP are really rare
AMD K5-PR200 is just uncommon
AMD X5-160 ADZ - I believe it's a fake but rare too.

2)I'd buy both 5x86-133GP and MII-433GP...
and X5-160 ADZ too because all fakes (if they were made at that time to cheat a byer but not today to cheat a collector) are interesting too.
Already have. K5-PR200

3) imho K5-PR200 and X5-160 ADZ $25 each
Cyrix 5x86-133GP and Cyrix MII-433GP $50... $120 each

Reply 7 of 58, by Tetrium

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I only have the Cyrix-133. Never seen any of these 4 in the wild. The Cyrix MII-400 is relatively easy to get though, I got 3 of those and only 15Mhz slower then the 433 one. I reckon the 400 can be overclocked to 433 levels with relative ease (I'm working on such a rig right now though progress is very slow)

Whats missing in your collections?
My retro rigs (old topic)
Interesting Vogons threads (links to Vogonswiki)
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Reply 8 of 58, by feipoa

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I am in agreement with iguana_kiev about the rarity order, from most rare to least.

1) Cyrix 5x86-133GP (only ever seen 1 of these on eBay plus the 1 group buy)
2) Cyrix MII-433GP (I've actually seen two of these on eBay, but at the time, I felt $30 was too much)
3) AMD X5-160 (Never seen one of these on eBay or CPUWorld, but there seem to be quite a few reports of people using them)
4) AMD K5-PR200 (It used to be a lot easier to find these on eBay back in 1999)

My order of most desirable
1) Cyrix 5x86-133GP because it is the fastest stock socket 3 ever made.
2) Cyrix MII-433GP because it is that last real Cyrix CPU and may be more overclockable than the more common MII-400GP.
3) AMD K5-PR200. These chips don't OC well, so this little deal is the fastest of the K5 line before AMD switched architecture directions entirely. It was quite an amazing little CPU for its time.
4) Not terribly excited about an officially marked X5-160 as it is not the fasest socket 3 available, and the X5-133's with CPUID 04F4 can almost always be upclocked to 160 MHz.

I really like the prices iguana_kiev posted. That is a really good attempt to keep these CPU's priced low, however I'm not sure how realistic it is. Tetrium, would you sell your Cyrix 5x86-133GP for $120? hahaha, you, you don't have to answer that. Since I don't want this post to influence collector prices, I'll just rank them in terms of which I feel is the most cost valuable.

1) Cyrix 5x86-133GP $10
2) Cyrix MII-433 $9
3) AMD K5-PR220 $7
4) AMD X5-160 $6

I once had a Cyrix MII-400 rig at 300 MHz in a case. It was in one of those problematic FIC Super7 boards. It was significantly slower than an AMD K6-III+ at 450 MHz. I am also planning on rebuilding this rig for MII - 333 MHz (83 MHz x 4.0) operation,

Plan your life wisely, you'll be dead before you know it.

Reply 9 of 58, by GXL750

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From personal experience, I find the 6x86MX/MII chips to be an odd device. They'll load the OS fast enough and the OS itself as well as some simple programs will run quite well but beyond that and for most tasks, you're really better off with a K6-2 or a 233mhz Pentium MMX.

I consider the MII and 6x86 CPUs to have no value outside collector's value.

Reply 10 of 58, by Tetrium

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GXL750 wrote:

From personal experience, I find the 6x86MX/MII chips to be an odd device. They'll load the OS fast enough and the OS itself as well as some simple programs will run quite well but beyond that and for most tasks, you're really better off with a K6-2 or a 233mhz Pentium MMX.

I consider the MII and 6x86 CPUs to have no value outside collector's value.

The 2.2v MII's are somewhat interesting though. They are fast OS CPU's for their speed, produce little heat (in contrary to the older 2.9v MII's which ran quite hot) and "I guess" could be considered to be of about equal speed to a Pentium non-mmx.

Whats missing in your collections?
My retro rigs (old topic)
Interesting Vogons threads (links to Vogonswiki)
Report spammers here!

Reply 11 of 58, by feipoa

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I really would be curious to know just how the MII-433 @ 300 MHz compares up to the Pentiums. One day I'll get around to the ultimate socket 7 comparison. My gut feeling is that it is somewhere between a P233MMX and a P266MMX, perhaps even a slow slot1 celeron.

Plan your life wisely, you'll be dead before you know it.

Reply 12 of 58, by sliderider

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Seeing as there is a AMD K5 PR200 on ebay right now, it seemed like a good time to necro this thread. In answer to the OP's question, I have now seen every one of the chips mentioned on the list for sale in the last 5 years EXCEPT for the AMD 5x86 160, so that probably makes it the rarest (or at least the hardest to get since nobody who has one seems to have been in a selling mood for quite some time.)

Reply 14 of 58, by F2bnp

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vmunix wrote:

No chip can beat the Cyrix 6x86 PR80 (80Mhz , 40Mhz fsb) 🤣
http://www.cpu-museum.de/?m=Cyrix&f=6x86#cpu0184

Holy crap, taking slow to a new level. How did they achieve 40MHz FSB on socket 5 boards? Isn't 50 the lowest possible?

Reply 15 of 58, by vetz

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F2bnp wrote:
vmunix wrote:

No chip can beat the Cyrix 6x86 PR80 (80Mhz , 40Mhz fsb) 🤣
http://www.cpu-museum.de/?m=Cyrix&f=6x86#cpu0184

Holy crap, taking slow to a new level. How did they achieve 40MHz FSB on socket 5 boards? Isn't 50 the lowest possible?

I have no clue how they got 40mhz FSB, and god damn that CPU must have been slow! I want to see some comparison benchmarks just for lolz!

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Reply 16 of 58, by nforce4max

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Well I have seen most of these on eBay but that was years ago and did see one MII-433GP but that was back in like 05 or 06.

On a far away planet reading your posts in the year 10,191.

Reply 17 of 58, by vmunix

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nforce4max wrote:

Well I have seen most of these on eBay but that was years ago and did see one MII-433GP but that was back in like 05 or 06.

Totally, i remember the 433 part around 2003 in ebay and they were not that rare or expensive, a couple of years later I tried again and there were none, never seen them again.
I also remember how a Japanese guy won the auction for two Joshua core C3 I had little idea they were so rare back then.

Trailing edge computing.

Reply 18 of 58, by feipoa

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vetz wrote:

I have no clue how they got 40mhz FSB, and god damn that CPU must have been slow! I want to see some comparison benchmarks just for lolz!

While I did benchmark an actual Cyrix 6x86-P90+GP (80 MHz) for the U6BC, the closest to 80 MHz I could get it was 1.0 x 83 MHz, which is not quite the same. I think there were a few socket 5 boards with a 40 MHz FSB option.

Plan your life wisely, you'll be dead before you know it.

Reply 19 of 58, by Gona

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feipoa wrote:
vetz wrote:

I have no clue how they got 40mhz FSB, and god damn that CPU must have been slow! I want to see some comparison benchmarks just for lolz!

While I did benchmark an actual Cyrix 6x86-P90+GP (80 MHz) for the U6BC, the closest to 80 MHz I could get it was 1.0 x 83 MHz, which is not quite the same. I think there were a few socket 5 boards with a 40 MHz FSB option.

Some OPTi chipset support fsb lower than 50MHz. I have a Socket 5 board with OPTi 82C596/82C597/82C822 chipset (TMC PCI54PV) what I can boot with 1.5 * 26.7MHz = 40MHz. There is also 1.5 * 22MHz = 33MHz but freezes at second bios screen.
Some weeks ago my Cyrix 6x86 PR80 has arrived. Almost all pins was bent but no-one is missing, I have played a day to fix all of the pins.
I have tried the Cyrix 6x86 PR80 with the TMC PCI54PV board but it seems to me the CPU has killed my board. Now I have put back the P100 CPU and I have put a PC analyser to an ISA slot, but writes nothing...
My CPU has printed "016" on it so it is 3.3V according to:
http://www.pc-atrium.de/html/cyrix6x86.html
I don't thing that the 3.3V is too low for a 3.5V board.
Now I have found on the net ASUS Socket 7 boards where manual writes only 6x86-PR166+ and later Cyrix CPUs and for 166+ they writes:
"The only IBM or Cyrix 6x86(L) (or M1) that is supported on this motherboard is revision 2.7 or later".
Why is this?

Last edited by Gona on 2017-10-01, 06:31. Edited 2 times in total.

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