#A2620
Bill, I finally installed the new 68882 chip and clock on my A2620 board!
I ran a few tests and this is what I came up with:
For a 1/4 screen HAM RGB8 TRACE rendering in Imagine (V2.0) for a glass
sitting on a texture wrapped board: 1) NO ACCELERATOR – 2:43:17 (2 hours,
43 minutes, 17 seconds). 2) wimpy 68881 – 0:38:02
3) 25 Mhz 68882 – 0:22:25
(Kind of makes me appreciate ANY accelerator…)
For other pictures, the results were similar. I ran out of patience for
doing pictures WITHOUT the accelerator. But I ran a few tests comparing the
various FPUs against themselves. Merely installing a 68882 and using it at
the same speed as the stock 68881 produced pictures in 25% less time than
the basic A2620 board. Bumping up the clock speed to 25 MHz rendered in
anywhere from 33% to 41% less time than the A2620 with its 14 Mhz 68881.
What it comes down to is this…GET AN ACCELERATOR! Spend an extra $100 or
so and put in a 68882. (Or spend probably a lot less for a 14 Mhz 68882 and
get a fair speedup over the 68881…But you'll STILL find yourself wishing
for more speed!)
By the way, Wyle's phone number is 1(800) 672-3475.
Good luck! Robert