Benchmarks:
To test out the 72X
True-x CD-ROM we used a combination of benchmarking programs. They included MAXA
CD-Bench Pro, Sandra, CD-Speed 99 (0.66b), ZDnet WinBench 99, and Kenwood's Demo
Disc. Each of the benchmarks provides good data, and
some, like CD-Speed illustrate data transfer vs. rotational speed across the
entire disc.
Maxa CD-Bench
Pro
|
72X ATAPI |
40X ATAPI |
24X SCSI |
| RoMark |
7.0 |
8.6 |
3.7 |
| Cache size |
1.27Mb |
1.27Mb |
1.27Mb |
| Transfer rate |
4.03Mb/s |
3.8Mb/s |
1.27Mb/s |
| Read ahead |
1.05Mb |
1.05Mb |
1.05Mb |
| CPU load |
50% |
97% |
55% |
| Speed Factor |
26x |
25x |
8x |
| Avg. access time |
0.104 |
.083 |
0.181 |
| Drive type |
Kenwood UCR-421 |
CDU4011 |
CRW8424S |
| DMA enabled |
yes |
yes |
SCSI |
Maxa returns some values which give a bit more insight
into the Megabits/s that the 72X drive is spitting out. Compared to
the Sony 40X, the 72X Kenwood is able to shoot out an average data transfer rate
of 4.0Mb/s. Not sure why the 72X drive achieved a RoMark lower then that of the
Sony drive.
Sandra
|
72X ATAPI |
40X ATAPI |
24X SCSI |
| Drive index |
4048 |
1731 |
1145 |
| Drive tech. |
43x |
16x |
11x |
| Track speed |
22,680 RPM |
8703 RPM |
5940 RPM |
| Cache size |
1.24Mb |
1.24Mb |
1.24Mb |
| Buffer read |
571Mb/s |
376Mb/s |
288Mb/s |
| Sequential read |
6Mb/s |
2463kb/s |
1681kb/s |
| Random read |
492 kb/s |
634 kb/s |
341kb/s |
| Avg. access time |
100ms |
55ms |
129ms |
Notice how Sandra reports a rotational speed of over
22,000 for the Kenwood drive. Considering the limitations of motor
technology equate to drives sitting pretty under 10,000RPM it's obvious that
Sandra is misinterpreting the actual speed the 72X drive rotates the CD-ROM at.
Graphically the difference in Drive Index values is beyond obvious;
 |
| The 72X Kenwood drive leaves the reference drives in the
dust. No less then twice the performance gain is witnessed with a Drive
Index rating of 4048. |
 |
| For comparison we also tested out a 40X Sony CD-ROM. In
Sandra this drive performed just below that of the reference
drive. |
 |
| Lastly a 24X SCSI CD-RW was benchmarked. This Yamaha
drive held the worst scores across the board, including Sandra where it
posted a Drive Index of 1145 |
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