Afterburner/Nemesis performance benchmarks
Gembench results...
============================================
AFTERBURNER040 @ 16.5/33/66MHz
Standard Falcon
============================================
Falcon 030 TOS 4.04
AES v3.40
GEMDOS v0.48
MiNT not present
Blitter not present
NVDI 2.51 present
Video Mode: 640*480*2
FPU cookie value=$80000 (68040 internal)
Run and Malloc from FastRAM
Ref: F030 + FPU, 640*480*2
============================================
GEM Dialog Box:             0.770    454%
VDI Text:                   0.200   1700%
VDI Text Effects:           0.410   1826%
VDI Small Text:             0.250   1500%
VDI Graphics:               1.045    835%
GEM Window:                 0.535    261%
Integer Division:           0.910    340%
Float Math:                 0.095    357%
RAM Access:                 0.215   1023%
ROM Access:                 0.220    954%
Blitting:                   0.875    128%
VDI Scroll:                 1.140    231%
Justified Text:             0.920    354%
VDI Enquire:                0.110   1436%
New Dialogs:                0.905    491%
============================================
Graphics:                            837%
CPU:                                 668%
Average:                             792%

============================================
AFTERBURNER040 @ 20/40/80MHz
Nemesis fitted and running with 20MHz bus
============================================
Falcon 030 TOS 4.04
AES v3.40
GEMDOS v0.48
MiNT not present
Blitter not present
NVDI 2.51 present
Video Mode: 640*480*2
FPU cookie value=$80000 (68040 internal)
Run and Malloc from FastRAM
Ref: F030 + FPU, 640*480*2
============================================
GEM Dialog Box:             0.690    507%
VDI Text:                   0.175   1942%
VDI Text Effects:           0.365   2052%
VDI Small Text:             0.225   1666%
VDI Graphics:               0.920    948%
GEM Window:                 0.485    288%
Integer Division:           0.750    413%
Float Math:                 0.080    425%
RAM Access:                 0.180   1222%
ROM Access:                 0.180   1166%
Blitting:                   0.770    145%
VDI Scroll:                 1.030    256%
Justified Text:             0.835    390%
VDI Enquire:                0.095   1663%
New Dialogs:                0.800    556%
============================================
Graphics:                            946%
CPU:                                 806%
Average:                             909%

===============================================================

NEMESIS - VIDEO PERFORMANCE

Falcon with Nemesis at 24/48MHz (24MHz System speed/48MHz DSP & FPU)
- all are non-interlaced resolutions, 16-bit (65,536 colours per 
screen) on a standard 14" VGA non-multisync!

Expect far higher resolution modes with a half-decent multi-sync :-)

                 Bus    CPU    Video   Hz
640x480          24     24     24      60
720x528          24     24     24      50

Nemesis also accelerates the FPU and DSP to 48MHz.

============================================

NEMESIS + AFTERBURNER040 - VIDEO PERFORMANCE

Falcon with Afterburner040 and Nemesis - all are non-interlaced
resolutions, 16-bit (65,536 colours per screen) on a standard 14" VGA.

                 Bus    CPU    Pipe   Video   Hz
720x528          12.5   25     50     25      50
640x480          12.5   25     50     25      60
512x400          20     40     80     20      50

Note: Although the Afterburner CPU is being half-clocked in the 
highest resolutions, the actual performance is still much higher 
than a standard Falcon, and is completely switchable between the 
various specifications.