[MDA III, XDA III, PDA2k, 9090 Accessories] _Alex_:
FYI, my curiousity got the best of me again, so I tested my no frill card's speed more thoroughly. According to SiSoft Sandra, my card is at least 55x to 65x at 64MB chunks, via USB reader. See below for full details.

I also performed my own test, where I copied a single contiguous 1.9GB file (1944973970 bytes) to and from my SD card via USB reader.

Read: 262.50 seconds, 7.4MB/sec, 40x (@ 176K/x) or 50x (@ 150K/x)

Write: 204.84 seconds, 9.4MB/sec, 53x (@ 176K/x) or 63x (@ 150K/x)

This is no where close to the 150X claimed speed, but this may be a limitation of my 2.33Ghz Centrino laptop's 5400RPM hdd? Really can't tell since I don't have another SD card to test with, nor do I have current plans to test on other hardware...

Hope this helps!

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SiSoftware Sandra

Benchmark Results

Combined Index : 1296 operation(s)/min

Endurance Factor : 9.2

512B Files Test : 1382 operation(s)/min

32kB Files Test : 1617 operation(s)/min

256kB Files Test : 1012 operation(s)/min

2MB Files Test : 124 operation(s)/min

64MB Files Test : 8 operation(s)/min

Results Interpretation : Higher index values are better.

Performance Test Status

Run ID : ALEX2 on Saturday, August 27, 2005 at 11:51:07 PM

SMP Test : No

Total Test Threads : 1

SMT Test : No

Dynamic MP/MT Load Balance : No

Processor Affinity : No

512B Files Test

Read Performance : 13831 operation(s)/min (115 kB/sec, 0x)

Write Performance : 494 operation(s)/min (4 kB/sec, 0x)

Delete Performance : 1358 operation(s)/min

File Fragments : 1.0

Combined Index : 1382 operation(s)/min

32kB Files Test

Read Performance : 7001 operation(s)/min (3734 kB/sec, 21x)

Write Performance : 653 operation(s)/min (348 kB/sec, 1x)

Delete Performance : 1366 operation(s)/min

File Fragments : 1.0

Combined Index : 1617 operation(s)/min

256kB Files Test

Read Performance : 1865 operation(s)/min (7957 kB/sec, 45x)

Write Performance : 507 operation(s)/min (2163 kB/sec, 12x)

Delete Performance : 1340 operation(s)/min

File Fragments : 1.0

Combined Index : 1012 operation(s)/min

2MB Files Test

Read Performance : 267 operation(s)/min (9114 kB/sec, 51x)

Write Performance : 52 operation(s)/min (1775 kB/sec, 10x)

Delete Performance : 937 operation(s)/min

File Fragments : 1.0

Combined Index : 124 operation(s)/min

64MB Files Test

Read Performance : 8 operation(s)/min (8738 kB/sec, 49x)

Write Performance : 6 operation(s)/min (6554 kB/sec, 37x)

Delete Performance : 555 operation(s)/min

File Fragments : 1.0

Combined Index : 8 operation(s)/min

Endurance Test Status

Operating System Disk Cache Used : No

Use Overlapped I/O : No

Test File Size : 32MB

Block Size : 512 byte(s)

File Fragments : 1

Endurance Benchmark Breakdown

Repeated Sector ReWrite : 333 kB/s

Sequential Sector Write : 332 kB/s

Random Sector Write : 25 kB/s

Drive

Total Size : 1.9GB

Free Space : 1.9GB, 100%

Cluster Size : 4kB

Performance Tips

Notice 5901 : 1x=176kB/s; As some device makers use 1x=150kB/s exercise caution when comparing measured vs. published ratings.

Notice 5008 : To change benchmarks, click Options.

Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.

Notice 5006 : Only compare the results with ones obtained using the same version!

Notice 5207 : Consider using the File System Benchmark for non-Flash devices.

Notice 5900 : Endurance factor can only be used on the same type of device (SLC or MLC).

Tip 11 : Use the 'Switch Chart Type' button to switch between Detailed and Combined charts.

Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.