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WFS2005
Joined: 13 Mar 2007
Posts: 1526
Location: HB China
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 Posted: Sun Apr 04, 2010 8:14 am Post subject: Strange K6-2 400 |
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I check my collection and discovers this K6-2 400.
what are your opinion? |
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Neon
Joined: 04 Feb 2008
Posts: 1512
Location: Dallas, Texas, USA
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| Posted: Sun Apr 04, 2010 10:24 am Post subject: |
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Every K6-2 in my collection has 3.3V I/O.
This chip was made by ghosts at the factory? |
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thomsonicus
Joined: 11 Dec 2007
Posts: 226
Location: Poland
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| Posted: Tue Apr 06, 2010 5:23 pm Post subject: |
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What about K6-300AFR with 3.45V I/O? Common? I don't have any K6s so I'm no expert in this matter
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Neon
Joined: 04 Feb 2008
Posts: 1512
Location: Dallas, Texas, USA
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| Posted: Tue Apr 06, 2010 6:19 pm Post subject: |
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I have K6/300AFR and K6/300ADZ with 3.3V or with 3.45V I/O
I do not know why there are two types. |
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Chook
Joined: 29 Oct 2008
Posts: 2250
Location: Australia
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| Posted: Tue Apr 06, 2010 10:35 pm Post subject: |
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| Neon wrote: | I have K6/300AFR and K6/300ADZ with 3.3V or with 3.45V I/O
I do not know why there are two types. |
With differences like this, I think you'll find that the earlier chip is the 3.45 and the later chip is the 3.3. Some of the earlier versions of the fastest K6 and K6-2 chips at the time were 'factory overclocks' and a few months later when the manufactoring ability improved they no longer needed the extra voltage.
This is the case with the K6-2 400AHZ (factory overclock) and the K6-2 400AFR later version.
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Neon
Joined: 04 Feb 2008
Posts: 1512
Location: Dallas, Texas, USA
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| Posted: Tue Apr 06, 2010 11:30 pm Post subject: |
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ooops, I misread the list. I do not have a K6/300ADZ with 3.3V I/O.
Chook, what you say makes sense. Unfortunately, I only have 4 relevant cpus, so not many to prove or disprove the point:
K6/300AFR 9836 3.45V
K6/300AFR 9840 3.3V
K6/300AFR 9841 3.45V
K6/300ADZ 9839 3.45V |
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D.8080
Joined: 03 Apr 2006
Posts: 1474
Location: Italy
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| Posted: Wed Apr 07, 2010 3:45 am Post subject: |
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| Chook wrote: | | Neon wrote: | I have K6/300AFR and K6/300ADZ with 3.3V or with 3.45V I/O
I do not know why there are two types. |
With differences like this, I think you'll find that the earlier chip is the 3.45 and the later chip is the 3.3. Some of the earlier versions of the fastest K6 and K6-2 chips at the time were 'factory overclocks' and a few months later when the manufactoring ability improved they no longer needed the extra voltage.
This is the case with the K6-2 400AHZ (factory overclock) and the K6-2 400AFR later version. |
I remember the factory overclocks, in reviews and pc magazines they stated that those cpus couldn't be pushed more, compared to intel cpus.
Thanks for this memory. |
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WFS2005
Joined: 13 Mar 2007
Posts: 1526
Location: HB China
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| Posted: Fri Apr 09, 2010 9:17 am Post subject: |
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I have K6/300ADZ 3.45V I/O, 3.45V I/Ois not strange.
But 2.2V I/O is strange, fake or not? |
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Neon
Joined: 04 Feb 2008
Posts: 1512
Location: Dallas, Texas, USA
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| Posted: Fri Apr 09, 2010 11:34 am Post subject: |
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My guess is fake.
Debs is expert on this topic; maybe she will see this and offer an opinion. |
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Fri Apr 09, 2010 2:56 pm Post subject: |
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I would also say fake.
Additionally there is something wrong with the
zero in the datecode... and one strange zero in "C0RE"
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iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
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WFS2005
Joined: 13 Mar 2007
Posts: 1526
Location: HB China
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| Posted: Sun Apr 11, 2010 12:25 am Post subject: |
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Oh, yes. "M" looks really not same usual K6-2.
Now, I know it's fake.
Thank everyone |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Sun Apr 11, 2010 10:10 am Post subject: |
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IMO it's a fake, as they are nominally 3.3V I/O and should work in the range 3.135V - 3.6V. These details originaly came from AMD manuals (although I can't at the moment tell you which documents, but any that refer to the 400AFR should say the same).
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