Thursday, October 31, 2013
Product review: V7 32GB SDHC Class 4 Flash Memory Card (VASDH32GCL4R-1N)
I measured the performance of the SDHC memory card with several utilities and found it to be pretty good. It falls in the mid range of various memory cards I have tested in the past, it is neither the slowest nor the fastest.
To test various memory cards I run the same set of tests so I can compare them to each in "apples to apples" comparison, this way if some unit does not perform well I notice it by comparing it to other devices I have tested. My test consist of copying a large set of mp3 files totalling 638916 Megabytes.
V7 SDHC write performance:
✔ 1.178s (cpu) 2:01.43 (clock time)
For comparison I including numbers for copying the same set of files to SanDisk USB2 memory stick, Transcent microSDHC class 6 card, to hard disk of my computer,
✔ Transcent microSDHC : 1.482s (CPU time), 1:33.97 (clock time)
✔ SanDisk USB2: 1.358s (CPU time), 1:23.53 (clock time)
✔ Hard Drive: 0.573s (CPU time), 0:00.58 (clock time)
For read performance test I use Linux Disk Utility Benchmarks.
V7 SDHC Read-only performance:
✔ Minimum read rate 15.6 MB/s
✔ Maximum read rate 22.3 MB/s
✔ Average read rate 21.9 MB/s
✔ Average access time 0.8 ms
The only small negative I have to say that the packaging of the card does not include a plastic case which is included with some other cards. I like having a spare memory card when I travel and find these cases pretty handy.
I was supplied a sample for testing and an honest review, be it positive or negative.
You can find it on Amazon by following this link.
Ali Julia review ★★★★★