PUTTING THE LEXAR 1066X CF CARD TO THE TEST
For our testing today, we will be using a variety of free flash media transfer speed testing software; the reason for this being that anyone can simply download and duplicate our tests exactly. Simply click on the title link of each program for the free download. For our comparison testing, our newest Canon EOS 5D Mark IV will be used and we will do a direct comparison of both SD and CF cards in this camera.
ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.
The specifications for the Lexar 128GB Professional 1066x CF Card list UDMA 7 compatibility which means transfer speeds of 160MB/s are necessary. As we can see by this ATTO result, we are right in the ball park and this validates the fact that we are looking at one of the fastest CF cards on the market right now.
Crystal Disk Benchmark is used to measure read and write performance through sampling of random data which is, for the most part, incompressible. Performance is virtually identical, regardless of data sample so we have included only that using random data samples.
Data transfers with incompressible data, such as we might see with pictures, movies and music, slows just a bit but still shows the strength of this CF Card. Our choice of ONLY testing in Q32T1 Sequential is made as we only concern ourselves with validating the stated performance of the card.
The toughest benchmark available for solid state drives is AS SSD as it relies solely on incompressible data samples when testing performance. For the most part, AS SSD tests can be considered the ‘worst case scenario’ in obtaining data transfer speeds and many enthusiasts like AS SSD for their needs.
Once again, AS SSD confirms what we have seen in both previous tests and the Lexar 128GB Professional 1066x CompactFlash Card appears to be one of the best cards available today. Will it stand the test in actual camera tasting against the SD card though?