Fastest Cyrix socket 7 CPU?

Discussion relating to Socket 7 hardware.
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Uranium235
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Fastest Cyrix socket 7 CPU?

Post by Uranium235 »

Does anyone know what was the fastest Cyrix socket 7 CPU produced?
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kalabok
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Post by kalabok »

i allready tried to get an answer on that question. i guess we are talking about the m2 series.
the fastest i have seen as picture is a 433gp. 100*3, 300mhz. there is a site claiming that even the 550gp is existing. i think it was a 400mhz cyrix cpu! i wouldnt be surprised if it appears somewhere.
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KachiWachi
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Post by KachiWachi »

AFAIK, it was the MIIv 433GP (and I have one too! :P )
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PC #1 - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128 MB EDO. BIOS patched by Jan Steunebrink.
PC #2 - Amptron PM-7900 (M520), i200 non-MMX, 128 MB EDO
PC #3 - HP8766C, PIII-667, 768 MB SDRAM
PC #4 - ASUS P3V4X, PIII-733, 256 MB SDRAM
PC #5 - Gateway 700X, P4-2.0 GHz, 768 MB PC800 RDRAM
PC #6 - COMPAQ Evo N1020v laptop, P4-2.4 GHz, 1 GB PC2700 DDR
PC #7 - Dell Dimension 4600i, P4-2.8 GHz, 512 MB PC2700 DDR
PC #8 - Acer EeePC netbook, Atom N270 @ 1.60 GHz, 1 GB RAM
PC #9 - ??? ;)
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Uranium235
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Post by Uranium235 »

Thanks. :)
KachiWachi, have you ever compared the performance of your MII433 with an equally clocked K6-2? How about overclocking, can it run at 333Mhz?
I'd like to get one of those to experiment with but the 433 appears to be very rare. I've seen alot of MII350's and some MII366's but that's about it.
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kalabok
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Post by kalabok »

go to ebay.pl (poland),
there a seller offers the 400gp for 10 euros. with low shipping costs.
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KachiWachi
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Post by KachiWachi »

@Uranium235 -

I did way back when, but I have no idea where my personal copy of that data is.

I have some of it posted at the PCChips Lottery (now gone :( ) and at Wim's...take a look there.

Thanks.
Moderator - Wim's BIOS

PC #1 - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128 MB EDO. BIOS patched by Jan Steunebrink.
PC #2 - Amptron PM-7900 (M520), i200 non-MMX, 128 MB EDO
PC #3 - HP8766C, PIII-667, 768 MB SDRAM
PC #4 - ASUS P3V4X, PIII-733, 256 MB SDRAM
PC #5 - Gateway 700X, P4-2.0 GHz, 768 MB PC800 RDRAM
PC #6 - COMPAQ Evo N1020v laptop, P4-2.4 GHz, 1 GB PC2700 DDR
PC #7 - Dell Dimension 4600i, P4-2.8 GHz, 512 MB PC2700 DDR
PC #8 - Acer EeePC netbook, Atom N270 @ 1.60 GHz, 1 GB RAM
PC #9 - ??? ;)
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jsc1973
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Post by jsc1973 »

The 433 was the fastest they actually released. It didn't stay on the market long, because by the time it came out (spring 2000), there were far faster CPUs available in the budget CPU market. VIA was also about to come out with the Cyrix III and wanted to focus on that.

The PR433 had a die shrink to .18 microns, and was actually overclockable, the only Cyrix CPU of that generation that was. Many of them would hit 400 MHz with decent cooling. That said, the PR rating is bogus. An MII-433 was about even with a Celeron 333 in integer applications, much slower in FPU.

The PR550 Cyrix you heard of was probably a "Joshua" core Cyrix III. This was scheduled to be released in 2000, at clock speeds in the 400-500 MHz range with a slightly higher PR rating. It was released to hardware review sites and was ready to come out when the nearly the whole Cyrix team quit. VIA killed the Joshua and released the WinChip 4 as the Cyrix III instead, even though it had nothing to do with Cyrix. An improved version of this chip later became the C3.

Cyrix actually lives on today, in a sense, at AMD. The AMD Geode GX and LX processors are improved versions of the old Cyrix MediaGX chip.
FIC VA-503+, Rev. 1.2, AMD K6-III+ 450@550MHz, 80GB Seagate ATA-100, 3dfx Voodoo3 3500 TV, TB Montego II Quadzilla, Win98se, 384MB PC100

Compaq Presario 1273, AMD K6-III+ 450@400MHz 1.8v, 40GB Samsung 5400RPM, extremely hacked Win98SE, 288 (yes, 288!) MB RAM
(Also an AMD FX-8350, which does the heavy lifting these days...)
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theEMP
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Post by theEMP »

so did Cyrix get borged by AMD? I thought they became part of VIA?
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jsc1973
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Post by jsc1973 »

Actually, Cyrix was purchased by National Semiconductor in 1997, because National wanted the MediaGX design for itself. They were the ones who renamed it the Geode.

Two years later, National Semi sold off all of Cyrix, except for the Geode, to VIA. National had mismanaged Cyrix, and VIA continued to do so, all the way to the point where the Cyrix team quit en masse in 2000. VIA still holds the rights to the Cyrix name, but don't use it.

The Geode was later sold by National Semi to AMD, who use the name to sell a modified version of the original Cyrix design (Geode GX and LX), and for a super low-power version of the Athlon XP (Geode NX).
FIC VA-503+, Rev. 1.2, AMD K6-III+ 450@550MHz, 80GB Seagate ATA-100, 3dfx Voodoo3 3500 TV, TB Montego II Quadzilla, Win98se, 384MB PC100

Compaq Presario 1273, AMD K6-III+ 450@400MHz 1.8v, 40GB Samsung 5400RPM, extremely hacked Win98SE, 288 (yes, 288!) MB RAM
(Also an AMD FX-8350, which does the heavy lifting these days...)
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KachiWachi
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Post by KachiWachi »

My Cyrix is a VIA model...as denoted by the small (v) after the II.
Moderator - Wim's BIOS

PC #1 - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128 MB EDO. BIOS patched by Jan Steunebrink.
PC #2 - Amptron PM-7900 (M520), i200 non-MMX, 128 MB EDO
PC #3 - HP8766C, PIII-667, 768 MB SDRAM
PC #4 - ASUS P3V4X, PIII-733, 256 MB SDRAM
PC #5 - Gateway 700X, P4-2.0 GHz, 768 MB PC800 RDRAM
PC #6 - COMPAQ Evo N1020v laptop, P4-2.4 GHz, 1 GB PC2700 DDR
PC #7 - Dell Dimension 4600i, P4-2.8 GHz, 512 MB PC2700 DDR
PC #8 - Acer EeePC netbook, Atom N270 @ 1.60 GHz, 1 GB RAM
PC #9 - ??? ;)
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Uranium235
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Post by Uranium235 »

OK, I've managed to acquire a 2.2volt Cyrix MII-400 thanks to a tip from kalabok. It's clocked at 285Mhz (95x3) but easily does 300Mhz (100x3) so far for me on a FIC PA-2013. I've also got a later build K6-2 300 CXT core that I'm going bench for comparison.
Any suggestions for benchmark programs to use?
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KachiWachi
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Post by KachiWachi »

You should check to see if it has the undocumented 3.5x and 4x multiplier settings...just for fun. :wink:
Moderator - Wim's BIOS

PC #1 - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128 MB EDO. BIOS patched by Jan Steunebrink.
PC #2 - Amptron PM-7900 (M520), i200 non-MMX, 128 MB EDO
PC #3 - HP8766C, PIII-667, 768 MB SDRAM
PC #4 - ASUS P3V4X, PIII-733, 256 MB SDRAM
PC #5 - Gateway 700X, P4-2.0 GHz, 768 MB PC800 RDRAM
PC #6 - COMPAQ Evo N1020v laptop, P4-2.4 GHz, 1 GB PC2700 DDR
PC #7 - Dell Dimension 4600i, P4-2.8 GHz, 512 MB PC2700 DDR
PC #8 - Acer EeePC netbook, Atom N270 @ 1.60 GHz, 1 GB RAM
PC #9 - ??? ;)
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