CPUID of i486DX2 SK090

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Xaar



Joined: 30 Sep 2009
Posts: 319
Location: Germany

PostPosted: Sun Dec 27, 2009 2:57 pm    Post subject: CPUID of i486DX2 SK090 Reply with quote

Hello!

I am a bit confused of the CPUIDs of some of the newer 80486 class processors from Intel.

I got a A80486DX2-66 SK080 &E3V1X here, which is detected as an i486DX4 clocked at 66 MHz Shocked. My mainboard is a Concord Office Automation COA-921 whose FSB is fixed at 33 MHz and the multiplier is detected automatically. I used CPU-Z 1.19b (under Windows 95) and an Intel utility for DOS for reading out the CPUID, but they both say the same: The CPUID is 0480h. To my mind this CPUID belongs to the Intel DX4 processor. My two DX4-100 (SX900 and SK051) have the same CPUID.

I there anybody who has the same processor and can tell me his CPUID? Has anybody an idea, why there is a DX2 processor with a DX4 CPUID?

Best regards, Xaar

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Neon_WA



Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia

PostPosted: Sun Dec 27, 2009 7:43 pm    Post subject: Reply with quote

looking at the info vinicio provided.. it looks like the cpuid is more associated with core revision rather than cpu speed

http://www.cpu-world.com/forum/viewtopic.php?t=10470&highlight=486+cpuid

    401 SX308 25MHz A80486DX-25)/
    402 SX328 25MHz A80486DX-25)/
    402 SX329 33MHz A80486DX-33)/
    404 SX418 25MHz A80486DX-25)/
    404 SX419 33MHz A80486DX-33)/
    404 SX729 33MHz A80486DX-33)/
    411 SX546 50MHz A80486DX-50)/
    413 SX710 50MHz A80486DX-50)/
    414 SX767 33MHz A80486DX-33)/
    414 SX778 33MHz KU80486DX-33)/
    415 SX810 33MHz A80486DX-33)/
    420 SX431 16MHz A80486SX-16)/
    420 SX540 16MHz A80486SX-16)/
    420 SX406 20MHz A80486SX-20)/
    420 SX411 25MHz A80486SX-25)/
    420 SX468 25MHz A80486SX-25)/
    422 SX673 25MHz KU80486SX-25)/
    422 SX679 25MHz A80486SX-25)/
    422 SX826 25MHz A80486SX-25)/
    422 SX680 33MHz A80486SX-33)/
    423 SX798 25MHz A80486SX-25)/
    423 SX903 25MHz A80486SX-25)/
    423 SK798 33MHz A80486SX-33)/
    423 SX797 33MHz A80486SX-33)/
    423 SX902 33MHz A80486SX-33)/
    427 SX586 25MHz KU80486SX-25)/
    42A SX790 25MHz A80486SX-25)/
    428 SX683 25MHz KU80486SX-25)/
    432 SX626 50MHz A80486DX2-50)/
    433 SX641 50MHz A80486DX2-50)/
    433 SX749 50MHz A80486DX2-50)/
    433 SX645 66MHz A80486DX2-66)/
    433 SX750 66MHz A80486DX2-66)/
    433 SX762 66MHz A80486DX2-66)/
    435 SX808 50MHz A80486DX2-50)/
    435 SX912 50MHz A80486DX2-50)/
    435 SX912 50MHz A80486DX2-50)/
    435 SX807 66MHz A80486DX2-66)/
    435 SX911 66MHz A80486DX2-66)/
    436 SX954 50MHz A80486DX2-50)/
    436 SX955 66MHz A80486DX2-66)/
    45B SX845 50MHz A80486SX2-50)/
    480 SK047 75MHz A80486DX4-75)/
    480 SX884 75MHz A80486DX4-75)/
    480 SX900 100MHz A80486DX4-100)/
    480 SK050 100MHz A80486DX4-100)/
    480 SK051 100MHz A80486DX4-100)/
    483 SK096 100MHz A80486DX4-100)/


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red-ray



Joined: 18 Jun 2019
Posts: 46
Location: England

PostPosted: Thu May 08, 2025 7:24 am    Post subject: Re: CPUID of i486DX2 SK090 Reply with quote

Xaar wrote:
I there anybody who has the same processor and can tell me his CPUID? Has anybody an idea, why there is a DX2 processor with a DX4 CPUID?


I just came across this post and as it happens I got a SIV report from one a couple of days ago. It's CPUID is 0480, same as a DX4, and it's also got the same size L1 cache as the DX4 of 16KB rather than the usual 8KB.

From SIV V5.81 Beta-07 SIV correctly reports it as a DX2.
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