- May 11, 2008
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- 19,140
I've been using 1.5m long (~ 5 ft) USB 3.0 extension cables for more than 10 years. It's mostly with thumb drives and they work well. My SanDisk Extreme USB 3.0 drive gives about the same speed as when plugged in directly to the motherboard's front and rear ports, that is ~ 250/100 MB/s read/write speeds.
However, when I recently used the extension cable to connect a 2.5-inch SATA SSD with a SATA-to-USB adapter, it behaves erratically. I get acceptable read speeds of 350-400 MB/s but write operation is either dismally slow (<20 MB/s) or fails altogether.
The SATA-to-USB adapter works fine when plugged in directly to my computer's front or rear ports.
I guess the cable requirement is more stringent for the SATA interface. Or maybe it's power delivery. I tested with both an old and a brand new cable.
I ran the tests with two computers with the same results -
1. Phenom II x4 970 on MSI 970A-G43
2. Ryzen 5 8600G on MSI B650M-P
Can I expect a shorter extension cable to work better? Problem is, I wanted a 1.5-2-foot cable but couldn't find one. It's either 30cm (1 ft) or 1.5m (~ 5 ft.).
However, when I recently used the extension cable to connect a 2.5-inch SATA SSD with a SATA-to-USB adapter, it behaves erratically. I get acceptable read speeds of 350-400 MB/s but write operation is either dismally slow (<20 MB/s) or fails altogether.
The SATA-to-USB adapter works fine when plugged in directly to my computer's front or rear ports.
I guess the cable requirement is more stringent for the SATA interface. Or maybe it's power delivery. I tested with both an old and a brand new cable.
I ran the tests with two computers with the same results -
1. Phenom II x4 970 on MSI 970A-G43
2. Ryzen 5 8600G on MSI B650M-P
Can I expect a shorter extension cable to work better? Problem is, I wanted a 1.5-2-foot cable but couldn't find one. It's either 30cm (1 ft) or 1.5m (~ 5 ft.).
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