On Wed, Dec 15, 2010 at 04:00:52PM +0100, Alex wrote: > Hello everybody, > > I plan to build a quite powerful computer fully compatible with all the > software. > > I read all the thread of the mailing list, but I'm a bit lost. > > I thought to put : > > 2 x ATI Radeon HD 5970 > 2 x 4GB 1333MHz DDR3 > 1 x Intel Quad-Core i7 (2.93 GHz) > 4 x WD VelociRaptor (450 GB) > > Are there more suitable hardware for the same price ?
more suitable to 4 Velociraptors is a single 5850 at best. The math goes like this: 8 * 40 * 51 = 16320 disk lookups per burst. 4 times (dunno) 5 ms seek time => 20 seconds for the disk accesses. The 5850 can compute 37000 (18 * 64 * 32) chains before each core is saturated and it takes around 8 seconds to compute all the chains, so after 8 seconds you can compute 40 seconds worth of disk accesses with it. If you think, ok, the money saved on the GPU can be invested in flash memory, then you are wrong, because with flash, you can do enough disk accesses to saturate 1 or 2 5970s. > > Is it better to run under Ubuntu 32 bits or 64 bits ? 64bits of course. _______________________________________________ A51 mailing list A51@lists.reflextor.com http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
