English Amiga Board - View Single Post - Changing 68040 25 to 68040 33 on 603e plus

Jpor · 22 December 2021, 03:35

Well. I thought I’d best update this thread.
So long story short; The 040 25mhz and XTAL were soldered to the board. So I left the 040 25 in and removed the original 50 MHz and put in some XTAL removable posts.
I have now fitted a 66mhz XTAL as well as a good heatsink on the CPU.
So far so good. The 603e appears to be working fine including the built in SCSI.
Benchmarking with sysinfo shows I’m 1.33 times faster than a 25mhz stock 040.
SCSI seems to have improved? The system appears to be slightly quicker and snappy, but this could be psychological.

22 December 2021, 03:35	#15
Jpor Banned Join Date: Feb 2019 Location: United Kingdom Posts: 404	Well. I thought I’d best update this thread. So long story short; The 040 25mhz and XTAL were soldered to the board. So I left the 040 25 in and removed the original 50 MHz and put in some XTAL removable posts. I have now fitted a 66mhz XTAL as well as a good heatsink on the CPU. So far so good. The 603e appears to be working fine including the built in SCSI. Benchmarking with sysinfo shows I’m 1.33 times faster than a 25mhz stock 040. SCSI seems to have improved? The system appears to be slightly quicker and snappy, but this could be psychological.