| View previous topic :: View next topic |
| Author |
Message |
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
 Posted: Fri Mar 19, 2010 9:48 am Post subject: Cyrix 287XL+ |
 |
|
Today I visited a garage belonging to one guy who was a coolest computer seller 15-20 years ago here at local flea market.
I've bought a lot of probably a little bit overpriced 286, 287, 386, 486s, PPros, K5/K6s... over 100 chips totally.
But it looks that I've got two really uncommon chips besides of them 
Please note they have a diff print. So they are not for sale/trade. Thanks.
_________________
My Want List: http://www.cpu-world.com/forum/viewtopic.php?t=22729
Soviet chips info and my own collection: www.cpu-ukraine.com
Last edited by iguana on Fri Mar 19, 2010 11:29 pm; edited 9 times in total |
|
| Back to top |
|
 |
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
|
| Back to top |
|
|
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
| Posted: Fri Mar 19, 2010 9:57 am Post subject: |
|
|
I had already bought Cyrix 287 before here at forum sale
There were some doubt is it fake or not.
(EDITED: it's definately not a fake! Tested. Working.)
_________________
My Want List: http://www.cpu-world.com/forum/viewtopic.php?t=22729
Soviet chips info and my own collection: www.cpu-ukraine.com
Last edited by iguana on Mon Mar 22, 2010 11:52 am; edited 3 times in total |
|
| Back to top |
|
|
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
| Posted: Fri Mar 19, 2010 10:00 am Post subject: |
|
|
But as for these two I've bought today...
Is it posible that someone faked two diff print 287s to sell 15 years later for the same price as usual Intel C8087 ? (seems that that box with 287s (Intel, IIT, AMDand Cyrix!) was never opened last 15 years)
I believe - no way!
What would you say?
edited: Tested! All three WORKING!!! 
_________________
My Want List: http://www.cpu-world.com/forum/viewtopic.php?t=22729
Soviet chips info and my own collection: www.cpu-ukraine.com
Last edited by iguana on Mon Mar 22, 2010 10:38 am; edited 1 time in total |
|
| Back to top |
|
|
tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
|
| Posted: Fri Mar 19, 2010 11:47 am Post subject: |
|
|
| iguana_kiev wrote: | But as for these two I've bought today...
Is it posible that someone faked two diff print 287s to sell 15 years later for the same price as usual Intel C8087 ? (seems that that box with 287s (Intel, IIT, AMDand Cyrix!) was never opened last 15 years)
I believe - no way!
What would you say? |
Maybe not with the intention of selling 15 years later but 15-20 years ago remarked chips were much more common.
Nice chips
_________________
The two most common elements on Earth are oxygen and stupidity. |
|
| Back to top |
|
|
johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
|
| Posted: Fri Mar 19, 2010 2:36 pm Post subject: Re: Cyrix 287XL+ |
|
|
| iguana_kiev wrote: | Today I visited a garage belonging to one guy who was a coolest computer seller 15-20 years ago here at local flea market.
I've bought a lot of probably a little bit overpriced 286, 287, 386, 486s, PPros, K5/K6s... over 100 chips totally.
But it looks that I've got two really uncommon besides of them
Please note they have a diff print. So they are not for sale/trade. Thanks. |
Nice unusual chip!
The Cyrix 287XL+ is the first and only Co-processor I ever bought new.
I got mine in the 1990's to speed up my "PC-Limited" (now DELL) 286 machine and I think I paid about $70 for it. I saved it after I upgraded to a 486 and it was one of the earliest chips I kept before I knew I was a "chip collector". I'm glad I saved it.
What is one of these worth now? over $70?? 
_________________
My collection list (growing) http://johnorun.x86-guide.com/en/collection.html |
|
| Back to top |
|
|
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
| Posted: Mon Mar 22, 2010 10:47 am Post subject: |
|
|
It looks that Friday is not the best day for "never seen before" finds sharing Hope you all had a nice weekend.
Today I've tested my Cyrix 287 FPUs - All three WORKING !!! 
_________________
My Want List: http://www.cpu-world.com/forum/viewtopic.php?t=22729
Soviet chips info and my own collection: www.cpu-ukraine.com
Last edited by iguana on Mon Mar 22, 2010 11:38 am; edited 1 time in total |
|
| Back to top |
|
|
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
| Posted: Mon Mar 22, 2010 11:30 am Post subject: |
|
|
Here are some details:
MS-DOS 6.22
Chekit 3.0
Benchmarks -> Main System -> Math Speed
units - Times IBM PC-TX
CPU Siemens 80286-16 & 8MHz
AMD P80C287-10 49.89
Intel C80287XT 77.49
Cyrix 287XL+ 78.10
Cyrix CX-82S87 78.10
CPU Siemens 80286-16 & 16MHz
AMD P80C287-10 62.09
Intel C80287XT 103.41
Cyrix 287XL+ 118.88
Cyrix CX-82S87 118.88
Other MoBo , CPU Harris CS80C286-20 @ 20MHz
AMD P80C287-10 failed
Intel C80287XT failed
Cyrix 287XL+ 96.78
Cyrix CX-82S87 failed
From these FPUs only Cyrix 287XL+ passed the FPU test @20MHz
The result is 96.78 - probably the second MoBo is slower even at Harris-20 .
Looking for MoBo able to change CPU and the quartz crystal unit
Cyrix even a little bit faster at the same frequency than Intel !
AMD - a kilometre behind
Diff print Cyrix 287XL+ results are absolutely the same.
_________________
My Want List: http://www.cpu-world.com/forum/viewtopic.php?t=22729
Soviet chips info and my own collection: www.cpu-ukraine.com |
|
| Back to top |
|
|
hadeve
Joined: 15 Jun 2011
Posts: 3
Location: Enschede, NL
|
| Posted: Wed Jun 15, 2011 10:39 am Post subject: |
|
|
I just found a Cyrix 287XL+ also! i found it in an old pile of electronics at my univeristy. It is the AD3246A version. Unfortunately most of the the pins are a little bent.
I am not able to test it at this moment (do not own a working 286 board). Perhaps it will come up for sale. I will post a picture soon.
edit:
----
I read that a lot of these chips seem to be fakes. I think this one is real because I found it at my university and I have no reason to think this one is fake. By the way it is a ceramic DIP package.
Added some photo's, pins are bent, but I think they can be straightened again. |
|
| Back to top |
|
|
iulianv
Joined: 06 Jun 2011
Posts: 37
Location: Romania
|
| Posted: Mon Mar 19, 2012 12:26 pm Post subject: |
|
|
| Here's mine too - also AD3246A (most common?). By the way, what frequency is this rated for? |
|
| Back to top |
|
|
|
![[ Hidden ]](https://cdn.cpu-world.com/forum/templates/CPUWorld/images/lang_english/icon_email.gif "[ Hidden ]"){kind=icon}
