Let's begin with the backstory. I found myself needing more memory cards, and started comparing prices online. I noticed that Transcend memory is a LOT cheaper than Sandisk, and offers more bang for the buck. User reports online seemed pretty positive, so I went for it.
All tests are conducted with a Conceptronic all-in-one reader, connected via USB 2.0 (highspeed). Benchmarking program is CrystalDiskMark, set to 2 tests of 50 MB size
Sandisk 8 GB UltraII CF 30mb/s
Sequential Read : 18.062 MB/s
Sequential Write : 16.500 MB/s
Random Read 512KB : 18.595 MB/s
Random Write 512KB : 2.868 MB/s
Random Read 4KB (QD=1) : 4.630 MB/s [ 1130.3 IOPS]
Random Write 4KB (QD=1) : 1.193 MB/s [ 291.3 IOPS]
Random Read 4KB (QD=32) : 4.222 MB/s [ 1030.8 IOPS]
Random Write 4KB (QD=32) : 1.234 MB/s [ 301.2 IOPS]
Transcend 4 GB 133x CF (Outspecced by the Sandisk to be fair)
Sequential Read : 16.415 MB/s
Sequential Write : 5.882 MB/s
Random Read 512KB : 16.420 MB/s
Random Write 512KB : 3.270 MB/s
Random Read 4KB (QD=1) : 4.078 MB/s [ 995.6 IOPS]
Random Write 4KB (QD=1) : 0.025 MB/s [ 6.1 IOPS]
Random Read 4KB (QD=32) : 4.397 MB/s [ 1073.4 IOPS]
Random Write 4KB (QD=32) : 0.020 MB/s [ 4.8 IOPS]
Sandisk 8 GB UltraII SD (class 4)
Sequential Read : 20.042 MB/s
Sequential Write : 15.931 MB/s
Random Read 512KB : 19.636 MB/s
Random Write 512KB : 3.126 MB/s
Random Read 4KB (QD=1) : 3.628 MB/s [ 885.7 IOPS]
Random Write 4KB (QD=1) : 0.030 MB/s [ 7.2 IOPS]
Random Read 4KB (QD=32) : 3.662 MB/s [ 894.2 IOPS]
Random Write 4KB (QD=32) : 0.045 MB/s [ 11.1 IOPS]
Transcend SD 8GB Class 10
Sequential Read : 17.772 MB/s
Sequential Write : 12.721 MB/s
Random Read 512KB : 17.142 MB/s
Random Write 512KB : 1.723 MB/s
Random Read 4KB (QD=1) : 2.953 MB/s [ 721.1 IOPS]
Random Write 4KB (QD=1) : 0.050 MB/s [ 12.3 IOPS]
Random Read 4KB (QD=32) : 2.942 MB/s [ 718.2 IOPS]
Random Write 4KB (QD=32) : 0.057 MB/s [ 14.0 IOPS]
Even though the Transcend SD memory has better specifications, the Sandisk card just blows it out of the water in terms of performance.
The CF comparison isn't really a fair one because the Ultra has better specifications, but I felt like including it anyway.
Aside from these numbers, I did a couple of practice tests and I DID notice a difference when shooting the CF cards (the Transcend card sometimes choked the buffer). I didn't notice much difference between the SD cards, which shows that, despite it's lower specification, the Sandisk performs like a madman.
And now for the less-than-1-million-dollar question: which brand would I buy, had I known this in advance?
Sandisk. They are a bit more expensive, but even the lower specced ones outperform the high-spec Transcend memory. And the cards look cooler too!
I take pictures so quickly, my highschool was "Continuous High".
Last edited by Citruspers on Wed Jun 08, 2011 7:49 pm, edited 2 times in total.