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#1 dj'

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Posted 29 January 2014 - 11:35

Hey guys. I'm trying to sell some oldschool CPU on ebay but the front is attatched to a heatsink with some strongish sealant that i cant get off, so looking at the back its 168-pin - And by the size of the gold square it looks as if its AMD5x86 not Intel 486 (because the square is slightly smaller and intels tend to have a code printed on the gold squares)

 

however when i look at the AMD5x86 - they all have a gold line in one corner of the square - whereas this one dosent. anyone have any suggestions what type/model it might be? Dont think its Cyrix or IBM

 

Image shown below

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  • 112.JPG



#2 Phemo

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Posted 29 January 2014 - 11:44

Looks like it's possibly an AMD 486 DX to me.  Unsure whether it's a DX-40, DX2-66, DX4-100 or DX4-120 though.  Either way I'm pretty sure it'll be worth next to nothing.

 

Then again, these old CPUs do seem to sell for a reasonable amount considering.  Likely due to scrap gold recovery.



#3 thechronic

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Posted 29 January 2014 - 11:45

Is that one of the old Cyrix Processors?



#4 Yogurth

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Posted 29 January 2014 - 11:46

Should be this one, but as You said it is missing the gold line. However they both have one square pin at the same place perhaps from manufacturing process

 

AMD-X5-133ADW.jpg



#5 Phemo

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Posted 29 January 2014 - 11:49

Yes the AMD 586 chips had that line but the AMD 486 chips don't seem to and they look like the pic posted up.  Here are some examples:

 

http://www.cpu-colle...1=AMD&l2=486 DX



#6 Buzz99

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Posted 29 January 2014 - 11:50

I do have an old Cyrix processor and it has something printed in the middle of the pins side. It's an old Cx486DLC and it's printed "1992CyrixUSA" . So I doubt that's a Cyrix.



#7 thechronic

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Posted 29 January 2014 - 11:52

More inclined to agree it's an old AMD 


http://www.cpu-museu...NV8T 3Volt back

http://www.cpu-museu... V8T 3Volt back

http://www.cpu-museu... V8T 3Volt back



#8 Yogurth

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Posted 29 January 2014 - 11:53

It is actually Intel 486DX4-100 SK051. So ignore my post about it being AMD.

 

 

80486DX4-100-frontside.jpg

 

80486DX4-100-backside.jpg

 

http://www.devicelog...6dx4-100-sk051/



#9 Phemo

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Posted 29 January 2014 - 11:54

Except the Intel chip has the printing on the gold square, the one in the first post doesn't.  And AMD's 486 chips match the ones in the first post exactly.  I'm still sticking with it being an AMD 486 of some sort.



#10 OP dj'

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Posted 29 January 2014 - 12:00

Thanks so much for the suggestions guys. and yes they have gone up slightly in value. some can sell for potentially 10-30 pounds so i'd love to know what model it is as i can't get the heatsink off!

 

And yes im not sure if its an intel, as i said they all have the printing on the gold squares! - where as mine dosent. nore does it have the gold line in the edge of the gold square - however im still more inclined to say its an amd5x86

 

Can we get a definite suggestion?! kind regards!



#11 Phemo

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Posted 29 January 2014 - 12:04

Well if you look at the link in my post above you'll see the AMD 486 variants match it exactly.  However it's impossible to identify exactly which CPU it is from the bottom.  The only way you'll know for definite is by getting the heatsink off or by putting it in an old Socket 3 motherboard and firing it up.



#12 thechronic

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Posted 29 January 2014 - 12:07

i think it's one of the 3 i listed in all honestly but beyond that sadly they look 99.9% if not 100% the same as far as i can see. 

My advice? Use dental floss and keep working away it should shift it if it's not ridiculously stuck and then attempt to remove it with a twisting motion. Failing that a safe way to heat it gently. No metal objects to 'pry' it as this risks damaging it or snapping/bending a pin. 



#13 +zhiVago

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Posted 29 January 2014 - 12:23

Soak the CPU pins up in some high alcohol containing solution (70-90%) like isopropyl alcohol for several hours. Leave it soaking for a night. The heatsink should come off easily the next morning.



#14 OP dj'

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Posted 29 January 2014 - 13:06

If i soak it in alcohol/purell gel (isopropyl) overnight do you think it would still work without damaging it? Im not planning on running it or plugging it in anytime soon



#15 xendrome

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Posted 29 January 2014 - 13:25

It's a Intel 486 DX it looks like something that shipped with a PCChips style motherboard, which came as a combo kit of MB/CPU already together. That's why where are no markings on the bottom silicon cover. Can you give an exact pin count, did you actually count them out to verify?