I have just purchased a silverstone FT03 case do you think an X850 seasonic PSU would fit inside? Has anyone got any experience with this combination?
Seasonic X-850 physical spec: 5.91" x 6.30" x 3.39" - source FT03 PSU limitation: 180mm deep - source 180mm ~ 7in. Assuming the last value is the height you're well within that measurement you should be fine.
Have a browse through this thread for ideas: http://forums.bit-tech.net/showthread.php?t=203170. One of the posters bought a Silverstone Strider SST-ST50F-P 500w modular PSU and a short cable set (SST-PP05). The case is so small, the short cable set for £11 make sense. Maybe something to think about?
I've also read these forums but I thought the Seasonic would be more efficient. The Seasonic appears to be very efficient from the reviews and there is not much information about the quality of the Strider online (e.g. no review from bit-tech).
Correct. I only pointed out what someone else had done with the FT03. I would also question the need for an 850w PSU. Are you planning on two GPU's in an FT03? If so, it is going to get toasty inside. A 660w Seasonic X Series would be perfect for a single GPU, maybe even consider a 560w, especially if building a Sandy Bridge rig.
Here is a high quality review of the Silverstone Strider Plus 500W, which also incorporates a review of the FT03: http://translate.google.com/transla...0f-p-pp05-90888.html&rurl=translate.google.es