Speed comparison on XP: SDHC Cards vs USB vs Hard Drive
I am thinking to install XP on removable drive. Can anyone tell me what's the speed comparison among these? SDHC Cards vs USB vs Hard Drive.
And what's the impact will I encouter if I install Xp on the removable drive? Thank you.
And what's the impact will I encouter if I install Xp on the removable drive? Thank you.
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... here's an example of an external SSD setup you could use:
Drive: http://www.newegg.com/Product/Product.aspx?Item=N82E16820609270
Case: http://www.newegg.com/Product/Product.aspx?Item=N82E16817145137
Note that there are less expensive SSD's => but they typically have much lower performance. The one above has 60MB/s read speeds, and 45MB/s write speeds ... clearly enough to saturate the USB 2.0 bus (taking full advantage of it) ... and very competitive with "real" hard drives (faster, in fact, than most laptop drives).
Drive: http://www.newegg.com/Product/Product.aspx?Item=N82E16820609270
Case: http://www.newegg.com/Product/Product.aspx?Item=N82E16817145137
Note that there are less expensive SSD's => but they typically have much lower performance. The one above has 60MB/s read speeds, and 45MB/s write speeds ... clearly enough to saturate the USB 2.0 bus (taking full advantage of it) ... and very competitive with "real" hard drives (faster, in fact, than most laptop drives).
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Hi garycase, you said SDHC cards can achieve speeds in the 20MB/s range. But I checked the link here http://www.sdcard.com/usa/TextPage.asp?Page=3.
The fastest speed is only 6 MB/s.
The fastest speed is only 6 MB/s.
That link shows the "type" ratings -- what speed you must achieve to be rated as a specific "type" card. It doesn't limit the speed of the cards ... which get a bit faster with each generation.
Here are a couple of the fastest current cards - both rated at 20MB/s or faster:
SanDisk: http://www.flash-memory-store.com/4gb-sandisk-extreme-iii-sdhc-memory-card.html
Qmemory (with SamSung chips): http://www.flash-memory-store.com/qmemory-secure-digital-16gb.html
Here are a couple of the fastest current cards - both rated at 20MB/s or faster:
SanDisk: http://www.flash-memory-store.com/4gb-sandisk-extreme-iii-sdhc-memory-card.html
Qmemory (with SamSung chips): http://www.flash-memory-store.com/qmemory-secure-digital-16gb.html
The current SD 2.0 specification can, theroretically, achieve 150x speed (22.5 MB/s). Compare that with USB 2.0 performance of 60 MB/s and a SATA 3 speed of 300 MB/s. IF you are going to install on an external drive, USB will provide much better performance that SDHC.