[A51] 6990M mobile GPU

Andy Isaacson adi at hexapodia.org
Sun Apr 6 23:30:28 CEST 2014


On Sun, Apr 06, 2014 at 09:35:17PM +0200, Malak Leman wrote:
> Since a laptop can't get a dedicated SATA card and an array of disks,
> what kind of performance per burst can be expected with this GPU and 2
> x 1Tb SSD ?

You can use an ExpressCard-eSATA card and two (or more) external disks,
such as http://www.newegg.com/Product/Product.aspx?Item=N82E16839158039

You should be able to do about 400 MB/sec through that card, limited by
the PCIe 2.0 x1 link from the expresscard to the CPU.  With 4kB random
reads that's about 100,000 IOPS.

(Caveat, it's not entirely clear which ExpressCard 2.0 devices support
5Gbit/s links, some are 2.5 Gbit/S limiting you to 200 MB/sec and 50,000
IOPS.)

-andy



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