Hi
The bottleneck to speed of image processing is not the cpu or the
harddisk it is ram.
A less expensive CPU and as much ram as you can have enables better
processing.  SDD's are fine for faster loading of programing but are
not as fast as a ramdisk.
Novatech do:
http://www.novatech.co.uk/products/components/motherboards/intelsocket2011-3/x99chipsetatx/ga-x99-sli.html
www.novatech.co.uk/products/components/memory-pc/ddr4memory/ddr4pc4-170002133mhz/cmk16gx4m2a2133c13.html 
http://www.novatech.co.uk/products/components/processors/intelcorei72011/bx80648i75820k.html
John Eayrs
On Wed, 12 Aug 2015 16:03:36 +0100
Clive Woodfine <clivewoodfine@???> wrote:
> Having just read the similar thread about Gaming Machines can anyone
> recommend a machine suitable for photography?
> 
> At present I use Darktable to get the most out of RAW files and I
> would like to use Digikam for general organising. I find my present
> machine is too slow if I have a lot of images to work on. It is
> several years old.
> 
> It has to be Linux friendly of course. Up to about a £1000 limit.
> 
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