RoyC wrote:
The 1st thing I would do is get a new USB 3.0 reader as your current one appears to be bad.
Why do you say that? If the 1000X speed doesn't saturate the bus of USB 2.0, there's not much reason for improvement on USB 3.0 (the chipset could be responsible for the minor difference).
I've got some folks much more technical than I am that I'll ask. It seems like the reader would work or it wouldn't...
what bus is your built in reader using, PCIe, USB3 or USB2?
i just recently got a sager notebook (HM77 chipset) and the built in SD reader turned out to be damned fast vs my 4 year old Asus (now defunct) machines reader.
The USB3 standard has throughput at up to 500MB/s, so the cards or the computer should be the limiting factor.
The Lexar 1000x cards should transfer at least at 100MB/s, so 2GB should take around 20 secs.
The 400x cards should transfer at least at 40MB/s, so 2GB should take around 50 secs - which means the built-in SD reader in your laptop is near the max transfer speed.
the built reader on the sager notebook NP9130 using a current sandisk 95MB/s extreme pro SDHC card clocked a consistant 77-80MB/s which is quite impressive. the same card on Lexar USB3 Pro reader on my desktop USB3 port was 72-77MB/s
both transfers were straight drag and drop w/o the use of any intermediary software. the pkg consisted of 63 D7000 14bit raw images with a total weight of 1.34GB
point of reference on the Lexar 1000x CF cards: above the 16GB model (32GB and up) the writes are rated at 145MB/s and the reads 150MB/s. this is based on UDMA7 compliant devices being used. this is pretty much near top end for the CF cards limits.
The reader is actually a Express card removable module on my ThinkPad T430s.
On the others, I'm aware of the *rated* speed, and I certainly see the value of 1000X vs. 400X on the readers. I'm just a little surprised how close they were on the old USB 2.0 reader vs. new USB 3.0.
Looking at the wikipedia page, USB 2.0 should be capable of 60MB/sec. (theoretically) and USB 3.0 should be 625MB/sec, so it does seem like there should be some difference on the 1000X cards.
I'm also on a pre-production T430s, so maybe I need to update the drivers... I'll do that and report back.
M635_Guy wrote:
The reader is actually a Express card removable module on my ThinkPad T430s.
On the others, I'm aware of the *rated* speed, and I certainly see the value of 1000X vs. 400X on the readers. I'm just a little surprised how close they were on the old USB 2.0 reader vs. new USB 3.0.
Looking at the wikipedia page, USB 2.0 should be capable of 60MB/sec. (theoretically) and USB 3.0 should be 625MB/sec, so it does seem like there should be some difference on the 1000X cards.
I'm also on a pre-production T430s, so maybe I need to update the drivers... I'll do that and report back....Show more →
now expresscard uses either PCIe or USB2 for a path that is decided by the maker of the module using the slot.
