The Fastest CompactFlash Cards

These are the results of our speed test, sorted by writespeed performance. Click the bold tableheaders to make your own sorting.

Product UDMA GoClass Writespeed MB/s Readspeed MB/s
1. Transcend Ultimate 600X 16 GB UDMA G74 74.70 92.30
2. Transcend Ultimate 600X 32 GB UDMA G72 72.63 90.81
3. Pretec CompactFlash 32 GB UDMA G72 72.32 94.12
4. Sandisk Extreme Pro 16 GB UDMA G69 69.59 99.51
5. Sandisk Extreme Pro 64 GB UDMA G68 68.58 99.02
6. Transcend Ultimate 600X 8 GB UDMA G67 67.42 68.40
7. Sandisk Extreme Pro 90MB/s 32 GB UDMA G63 63.65 94.74
8. Integral Ultima Pro 32 GB UDMA G61 61.87 132.30
9. Kingston Ultimate 32 GB UDMA G58 58.29 113.20
10. Transcend Premium 400X 64 GB UDMA G57 57.60 92.40
11. Transcend Premium 400X 32 GB UDMA G56 56.60 89.10
12. Kingston Ultimate 600X 16 GB UDMA G55 55.73 85.64
13. Sandisk Extreme 32 GB UDMA G53 52.94 48.09
14. Sandisk Extreme 32 GB UDMA G52 51.96 48.27
15. Integral Ultimata Pro 16 GB UDMA G45 45.20 134.10
16. Duracell Pro Photo 8 GB UDMA G41 41.02 90.36
17. Sandisk Extreme IV 4 GB UDMA G39 39.70 42.10
18. Transcend Premium 400X 8 GB UDMA G30 30.78 59.95
19. Transcend Premium 400X 16 GB UDMA G29 29.25 58.89
20. Duracell Pro Photo 4 GB UDMA G28 28.69 42.33
21. Sandisk Extreme IV 2 GB UDMA G27 27.72 39.21
22. Kingston Ultimate 266X 32 GB UDMA G26 26.60 85.67
23. Sandisk Extreme III 16 GB UDMA G25 25.05 29.81
24. Sandisk Ultra II 1 GB UDMA G8 8.53 13.04
25. Kingston Digital Memory Card 1 GB UDMA G4 4.83 3.73

All CompactFlash Cards

Duracell
Product UDMA GoClass Writespeed Readspeed
Duracell Pro Photo 8 GB UDMA G41 41.02 MB/s 90.36 MB/s
Duracell Pro Photo 4 GB UDMA G28 28.69 MB/s 42.33 MB/s
Integral
Product UDMA GoClass Writespeed Readspeed
Integral Ultima Pro 32 GB UDMA G61 61.87 MB/s 132.30 MB/s
Integral Ultimata Pro 16 GB UDMA G45 45.20 MB/s 134.10 MB/s
Kingston
Product UDMA GoClass Writespeed Readspeed
Kingston Ultimate 32 GB UDMA G58 58.29 MB/s 113.20 MB/s
Kingston Ultimate 600X 16 GB UDMA G55 55.73 MB/s 85.64 MB/s
Kingston Ultimate 266X 32 GB UDMA G26 26.60 MB/s 85.67 MB/s
Kingston Digital Memory Card 1 GB UDMA G4 4.83 MB/s 3.73 MB/s
Pretec
Product UDMA GoClass Writespeed Readspeed
Pretec CompactFlash 32 GB UDMA G72 72.32 MB/s 94.12 MB/s
Sandisk
Product UDMA GoClass Writespeed Readspeed
Sandisk Extreme Pro 16 GB UDMA G69 69.59 MB/s 99.51 MB/s
Sandisk Extreme Pro 64 GB UDMA G68 68.58 MB/s 99.02 MB/s
Sandisk Extreme Pro 90MB/s 32 GB UDMA G63 63.65 MB/s 94.74 MB/s
Sandisk Extreme 32 GB UDMA G53 52.94 MB/s 48.09 MB/s
Sandisk Extreme 32 GB UDMA G52 51.96 MB/s 48.27 MB/s
Sandisk Extreme IV 4 GB UDMA G39 39.70 MB/s 42.10 MB/s
Sandisk Extreme IV 2 GB UDMA G27 27.72 MB/s 39.21 MB/s
Sandisk Extreme III 16 GB UDMA G25 25.05 MB/s 29.81 MB/s
Sandisk Ultra II 1 GB UDMA G8 8.53 MB/s 13.04 MB/s
Transcend
Product UDMA GoClass Writespeed Readspeed
Transcend Ultimate 600X 16 GB UDMA G74 74.70 MB/s 92.30 MB/s
Transcend Ultimate 600X 32 GB UDMA G72 72.63 MB/s 90.81 MB/s
Transcend Ultimate 600X 8 GB UDMA G67 67.42 MB/s 68.40 MB/s
Transcend Premium 400X 64 GB UDMA G57 57.60 MB/s 92.40 MB/s
Transcend Premium 400X 32 GB UDMA G56 56.60 MB/s 89.10 MB/s
Transcend Premium 400X 8 GB UDMA G30 30.78 MB/s 59.95 MB/s
Transcend Premium 400X 16 GB UDMA G29 29.25 MB/s 58.89 MB/s

Test Method

We tested the CompactFlash cards with a Pretec USB 3.0 Card Reader and CrystalDiskMark 3.0 x64. The software ran five 1000MB write- and readtests on the product. We noted the fastest results. Results can differ per computer, so we use the same hard- and software on every test. The fastest results on our system, will be the fastest on yours as well. Products with less than 1GB of memory are tested with 100MB files which might have better results compared to 1.000MB files.

1GB is normally 1.024MB. Vendors however, count 1GB as 1.000MB. We count the same way vendors do.