[ebay offer] Some CPUs for collectors

[priatna]

Hi,

I have some nice (and partly rare) CPUs to offer on ebay. The auctions will start on Sunday 9/19/2004 at 21:30 (GMT+1) and will end one week later. I have a lot of other normal CPUs to sell on ebay, so please feel free to dig the rare ones out of them.

AMD K5 -PR100ABQ
Cyrix 6x86-p150+GP with capicitors on the top
AMD K6 233APR
Intel 486SX-33
IBM BLUE LIGHTNING DX2
Intel RapidCAD

Here is the link to my auctions:
http://cgi6.ebay.de/ws/eBayISAPI.dll?ViewSellersOtherItems&userid=priatna&completed=0&sort=3&since=-1

Best Regards,
Priatna

[priatna]

A preview to the auction of the Intel RapidCAD-CPU-Set is available at the following URL:
http://user.cs.tu-berlin.de/~udatrolf/auktion/rapidcad.jpg

with kind regards
Rolf Kohlmeyer

[CPUShack]

those are nice looking chips.

[priatna]

Hi,

I added six more nice (and partly rare) CPUs on ebay. The auctions will start on Sunday 9/19/2004 at 21:30 and will end one week later. I have a lot of other normal CPUs to sell on ebay, so please feel free to dig the rare ones out of them.

Cyrix CX486DX2-V80
Intel 386DX-20 IV
Intel 486DX-50
ST6x86P166+
AMD Am386DXL-40
Intel Pentium 150

Best Regards,
Priatna

[priatna]

The Intel RapidCAD
------------------
The Intel RapidCAD is, in rough terms, an Intel 486DX with the 8 KB on-chip
cache removed and a 386 pinout. To software, it appears to be a 386DX with a
math coprocessor, as the 486-specific instructions have been removed from its
instruction set. It is marketed by Intel as "the ultimate coprocessor" and, as
the name implies, its main purpose is to replace the 386DX in existing systems
and thereby boost the performance of floating-point intensive applications such
as CAD software, spreadsheets, and math packages (e.g. SPSS, Mathematica).

RapidCAD is delivered as a set of two chips. RapidCAD-1 is a 132-pin PGA (pin
grid array) chip that goes into the CPU socket and replaces the 386DX. It
contains the CPU and the FPU (floating-point unit). RapidCAD-2 is a 68-pin PGA
chip that goes into the 387 coprocessor (or EMC) socket; it contains a simple
PLA whose only purpose it to generate the FERR signal for the motherboard
logic: this provides full PC-compatible handling of floating-point exceptions.
Many CPU instructions execute in one clock cycle in the RapidCAD, just as on
the Intel 486. The RapidCAD is constrained, however, by use of the standard
386DX bus interface, since every bus cycle takes two CPU clock cycles. This
means that instructions may be executed by the RapidCAD faster than they can be
fetched from memory. But as most FPU instructions take longer to execute than
CPU instructions, they are not greatly slowed down by this slow bus interface,
and most of them execute in the same time as in the Intel 486DX. Therefore, the
Intel RapidCAD provides higher overall floating-point performance than any
386/387 combination. Results from the SPEC benchmarks, a common workstation
UNIX benchmark suite, show that the RapidCAD provides 85% more floating-point
and 15% more integer performance than an Intel 386DX/387DX combination at the
same clock frequency.

The Power consumption of the RapidCAD is typically 3500 mW at 33 MHz.