There are only few Benchmark tools for OS4 out, i found cgxbenchmark and scsi-speed. My experience is that OS4 is lot faster in Intuiton, graphics are parly slower or faster as OS3, drive is slower, memory is slower. OS3.9 CPPC 68060 60 MHZ, 70ns, CVision: Simple CyberGraphics Benchmark v1.1 by Thomas Wenzel Raw transfer speed ------------------ Screen | Register to | FAST RAM to depth | video RAM | video RAM -------+-------------+------------- 15 | 19.0 MB/s | 13.4 MB/s 16 | 19.0 MB/s | 13.4 MB/s 24 | 18.9 MB/s | 13.4 MB/s 32 | 18.9 MB/s | 13.4 MB/s WritePixelArray() 320x240 ------------------------- Screen | Source: LUT8 | Source: ARGB depth | secs | fps | MB/s | secs | fps | MB/s -------+-------+-------+------+-------+-------+------ 8 | 1.10 | 181.6 | 13.3 | ----- | ----- | ---- 15 | 2.13 | 94.0 | 13.8 | 1.68 | 59.6 | 8.7 16 | 2.11 | 95.0 | 13.9 | 1.68 | 59.6 | 8.7 24 | 19.91 | 10.0 | 2.9 | 2.21 | 45.3 | 13.3 32 | 19.91 | 10.0 | 2.9 | 2.20 | 45.4 | 13.3 ScalePixelArray() 320x240 -> 640x480 ------------------------------------ Screen | Source: LUT8 | Source: ARGB depth | secs | fps | MB/s | secs | fps | MB/s -------+-------+-------+------+-------+-------+------ 8 | ----- | ----- | ---- | ----- | ----- | ---- 15 | ----- | ----- | ---- | 5.41 | 18.5 | 2.7 16 | ----- | ----- | ---- | 5.32 | 18.8 | 2.8 24 | ----- | ----- | ---- | 4.60 | 21.8 | 6.4 OS4 CPPC 604e 233 MHZ, 60ns, CVision: Simple CyberGraphics Benchmark v1.1 by Thomas Wenzel Raw transfer speed ------------------ Screen | Register to | FAST RAM to depth | video RAM | video RAM -------+-------------+------------- 15 | 15.2 MB/s | 13.4 MB/s 16 | 15.2 MB/s | 13.4 MB/s 24 | 15.2 MB/s | 13.4 MB/s 32 | 15.2 MB/s | 13.4 MB/s WritePixelArray() 320x240 ------------------------- Screen | Source: LUT8 | Source: ARGB depth | secs | fps | MB/s | secs | fps | MB/s -------+-------+-------+------+-------+-------+------ 8 | 1.11 | 180.1 | 13.2 | ----- | ----- | ---- 15 | 2.09 | 95.7 | 14.0 | 1.24 | 80.4 | 11.8 16 | 2.09 | 95.8 | 14.0 | 1.25 | 80.3 | 11.8 24 | 4.04 | 49.5 | 14.5 | 2.22 | 45.1 | 13.2 32 | 4.04 | 49.5 | 14.5 | 2.21 | 45.2 | 13.2 ScalePixelArray() 320x240 -> 640x480 ------------------------------------ Screen | Source: LUT8 | Source: ARGB depth | secs | fps | MB/s | secs | fps | MB/s -------+-------+-------+------+-------+-------+------ 8 | ----- | ----- | ---- | ----- | ----- | ---- 15 | ----- | ----- | ---- | 4.45 | 22.5 | 3.3 16 | ----- | ----- | ---- | 4.45 | 22.5 | 3.3 24 | ----- | ----- | ---- | 4.68 | 21.3 | 6.2 Then there is a native Scsispeed Version for OS4, but not a actual for OS3. ScsiSpeed is not very accurate. But i make a 68k Version of the Source that comes with the OS4 Version: OS3.9 CPPC 68060 60 MHZ, 70ns, CVision: CPU: 68040 AmigaOS Version: 40.68 Device: cybppc.device:1 Testing with a 512 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 761088 bytes/sec Testing with a 4096 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 6144819 bytes/sec Testing with a 32768 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 21155020 bytes/sec Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 30592204 bytes/sec OS4 CPPC 604e 233 MHZ, 60ns, CVision: CPU: 68020 AmigaOS Version: 52.21 Device: cybppc.device:1 Testing with a 512 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 1615334 bytes/sec Testing with a 4096 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 8713625 bytes/sec Testing with a 32768 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 16035020 bytes/sec Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer. Read from SCSI: 16882073 bytes/sec If you have a slower Harddrive the difference is lower, if you have a faster the opposite. Test was made with a 36 GB IBM SCSI Harddrive. The Values are RawSpeed only, without Filesystem. If you access 2 Drives with OS4 at the same time, for example for Burning the performance drops. Thats because of the OS4 cybppc.device, it has not a True DMA. Than i make Benchmarks with Sysspeed. There exist only a 68k Version, such speedtests should only made with native Versions. But a) the exist tools test only very few Functions b) its a good way to find out whats the speed of the Emulation because a lot of Applications and Games not available native. Red is OS3.9 CPPC 68060 60 MHZ, 70ns, CVision 800x600 Green is OS3.9 BPPC 68060 60 MHZ, 60ns, BVision 640x512 Blue is OS4 CPPC 604e 233 MHZ, 60ns, CVision 800x600