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Kenwood 72X CD-ROM Review
Kenwood 72X CD-ROM Review - PCSTATS
Is this marketing hype or are we looking at a drive that creates a black hole every time your copy of Quake III boots up. Only benchmarks will reveal the secrets behind the Kenwood 72X CD-ROM
 91% Rating:   
Filed under: Optical Drives Published:  Author: 
External Mfg. Website: Kenwood Aug 22 2000   Max Page  
Home > Reviews > Optical Drives > Kenwood TrueX 72X

CD Speed 99 ver 0.66

CD Speed 99 ver 0.66 beta

72X Avg Start End
Speed 65.02x 44.23x 72.10x
Random 1/3 Full
Seek Times 97ms 105ms 176ms
2x 4x 8x
CPU Usage 2% 5% 10%

This screen shot from CD Speed99 illustrates read speed (in green) vs. spindle speed (in yellow). In the image above from the 72X drive, and the one below from the 40X Sony drive we see that that both are operating on the CAV principle. Constant Angular Velocity CD-ROM's rotate the disk at a constant speed, resulting in slower data transfers at the beginning of the disc. In the case of the 72X drive, data rates start off at about 44X and work their way up 72X by the end of the disc even as the RPM lowers. From the numbers we can see that the average speed is about 65X.

40X Avg Start End
Speed 26.8x 16.05x 35.01x
Random 1/3 Full
Seek Times 85ms 89ms 163ms
2x 4x 8x
CPU Usage 1% 3% 5%

In the second example with the 40X Sony CD-ROM drive, we see almost Constant Angular Velocity hovering just above 16X. As the laser moves progressively closer to the outside edge of the disc the read speed increases, to a maximum of 35X, yielding an average of 26X across the entire disc.

Kenwood Demo Disk

Transfer rate 7.74Mb/s 2.95Mb/s 1.97Mb/s
Frame rate 11.73 Frames/s 4.49Frams/s 3 Frames/s
Video rate 59.1Mb/s 61.49Mb/s 63.10Mb/s

The Kenwood Zen Demo Disk works by flashing 50-odd high res images over and over. By this operation it is able to calculate the transfer rate at which data is flying off the disc, the rate at which individual frames are displayed, and the amount of data being handled by the video adapter. The Kenwood 72X drive scored significantly higher than each of the comparison drives.

CD WinBench 99

72X ATAPI Winmark 99 results 1040 Kb/s
40X ATAPI Winmark 99 results   413 Kb/s

The results of our WinMark 99 test say it all. Performance more than twice that of the reference 40X Sony drive.

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Contents of Article: Kenwood TrueX 72X
 Pg 1.  Kenwood 72X CD-ROM Review
 Pg 2.  Drive Specs
 Pg 3.  Benchmarks
 Pg 4.  — CD Speed 99 ver 0.66
 Pg 5.  Conclusion

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