>From memory, I can tell you that the download speed from the 80X card varied with which USB port I used on the computer, and whether or not I used a card reader. The slowest speed, which was pretty close to your 60X Sandisk, came from using the built-in multi card reader, and the faster speed came from using a Lexar multi card reader attached to a different USB port (the built-in reader not only has card slots but a USB and a Firewire port). Xfer time was measured using HD Tune and HD Tach.
I recently found a clock with a sweep second hand in my darkroom. Maybe I'll measure download speed using that at some point. Shel > [Original Message] > From: Godfrey DiGiorgi > LOL ... Performance the same as and half the price as the Sandisk > Ultra II is really enough advantage for me. ;-) > > Just to be sure, I tested download speed again. Sandisk ImageMate 12- > in-1 reader, Power Mac G5 tower USB 2, checking 'disk activity' with > the Activity Monitor application.... > > On a full card with varied mix of JPEG and RAW files, > - Transcend 150x - Read speed varies from 7.9 to 8.9 [EMAIL PROTECTED] > - Sandisk Ultra II (60x) - Read speed varies from 7.2 to 7.6 > [EMAIL PROTECTED] > > Average 8.4 vs 7.4 [EMAIL PROTECTED] means average performance gain of > 13.5%. > > In real world terms, this means 3 min, 50 seconds to transfer a full > 2G 150x card vs 4 min, 30 seconds to transfer a full 2G Ultra II > card, in round numbers. Timed out with a sweep second hand > wristwatch, the reality is pretty close to the calculation. That's a > useful if not earth shattering improvement. > > From an academic point of view, I'd be interested to know how fast > your system can download from these cards and how you are getting > that measurement. :-) > > Godfrey > > On Jul 14, 2006, at 1:47 AM, Shel Belinkoff wrote: > > > Thanks for doing all this. Even though there seems not to be much > > of an in > > camera advantage to using a card faster than about 80X. I think I'm > > going > > to get the 150X Transcend card anyway. The price/capacity ratio is > > too > > good to pass up, the faster downloading may be helpful (I ~think~ > > my system > > was a little faster than yours even with the slower card 9mbs, > > iirc), so > > it'll be interesting to see what it'll do with a card that's rated > > almost > > twice as fast, plus the newer cameras (Pentax or other brands) may > > be able > > to take better advantage of the faster cards, as might subsequent card > > readers. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
