By using this site, you agree to our Privacy Policy and our Terms of Use. Close
greenmedic88 on 05 May 2011
Edit Thread
jarrod said:
greenmedic88 said:

 

SD cards are not a substitute for HDD. Currently. Data transfer rates for standard Class 10 SD cards are about 10MB/s compared to the current average 2.5" HDD of 100-200 MB/s. Faster SD formats (UHS-1/UHS-2 compliant) are of limited availability (UHS-2 under development) and quite expensive. Current UHS-1 cards top out at about 45 MB/s at a cost of about $150 (low) for a 32GB card. This is not to say that Project Cafe will even support UHS-1/2 compliant SD format cards.


What are you talking about?  You can get a 64GB SDXC card with a transfer speed of 15MB/s for $113 or a 64MB SDXC card @ 25MB/s for $144 right now?  UHS-1 will run you more yeah (about $220-ish) but that's for 64GB @ 60MB/s. A year from now or whenever Cafe hits, they'll have larger size capacities and faster transfer speeds for less money... SD a year from will make more sense for a 360-plus level system.

Compared to a 2.5" 500GB 5600 rpm HDD that costs $50 with a data transfer rate of between 100-200 MB/s?

It isn't a comparison by any measure.

You're trying to compare a 15MB/s 64GB card with 100MB/s 500 GB HDD at less than half the price ($113 vs about $50). One third the price of the 25MB/s card, which still has only 1/4 th the transfer speed.

If you think 64 GB UHS-2 cards will exist in 2012 with data transfer rates of over 100MB/s for under $50, by all means, feel free to chime in now, but even if they matched the bandwidth of current common 2.5" 5600 rpm HDDs, which in the same time frame will be 1TB for the same price or much less for a 500 GB HDD, you're still comparing a 64GB storage device with a 500-1000 GB storage device.

Even a comparable capacity 64 GB SATA-3 SSD is currently cheaper with far faster transfer speeds.

While it's entirely possible I'M being the irrational one here, I'd rather have a 128-256GB SATA-3 SSD for "$50" if anyone actually believes NAND flash memory is going to be that cheap in another year than a 64GB UHS-2 SD card with a transfer rate that barely matches current HDDs with a fraction of the storage capacity.