Is there a need for a monitor, a set of speakers, and mouse and keyboard?

Bottlenecks always exist, but their level and the hardware involved varies between systems. The build has a powerful processor and a graphics processing unit though, both of which should work well together. RAM speed doesn't really affect system performance in a significant way, so you won't really have to bother much about it.

The compatibility of a graphics card with a computer casing depends largely on the casing's form factor and design. Most ATX and and larger form factor computer casings should have no problems supporting most available graphics card in the market.

Processor	-
Motherboard	MSI H77MA-G43 ( M-ATX board ) or MSI Z77A-G43 ( ATX board - RM289 and RM389 respectively )
RAM	2x 4GB DDR3 1333MHz KVR - RM138
DVD Rom	-
Solid State Drive	-
Hard Disk Drive	-
Graphics processing unit	-
Power Supply	Seasonic M12II 620 - RM349 ( Semi-modular )
Chassis	Any ATX chassis that you fancy for RM200 and above
Total	RM976 or RM1076 and above

This post has been edited by TDUEnthusiast: Jan 8 2013, 02:39 PM

It should work fine with your system.

Anyway, which 80 Plus series Silverstone power supply are you referring to? As far as I can see, there's no 80 Plus series. There are different Strider power supply series though, e.g the Strider Plus and the Strider Essential.

Actually I used to think that way too. It changed when I cleaned my system regularly last time. To dust the power supply I'd had to remove all the cables from the computer components before taking it out. Now with a X-660 I just have to unplug the cables from the power supply.

You add more chassis fan if the chassis you have chosen does not come with enough, or that the fans that came with the chassis are not good enough, i.e to keep the system running at acceptable temperatures under load. Some sub-RM200 chassis come with only one fan on either the front or the back of the chassis to save costs, so that warrants for the addition of chassis fans. You also won't need to buy thermal paste unless you're intending to use an after-market cooling system with your processor, and do not want to use the included thermal paste, which may not be good enough for some.

Anyway, judging from the specification of the system suggested to you, I'd put it ( system's theoretical "lifespan" ) at at least one years or until newer games that get released cannot play smoothly on your system. If you're talking about components life-span, then expect them to last at least for 2 years. The hard disk drive is the component that is most likely to give up easily though, and it could happen within a year, or even less. So take note and always watch your hard disk drive's health and listen for any weird noise that your hard disk drive may be producing.

Considering that you want to play recent games and future games on high settings, I would suggest an upgrade of the processor and the graphics card. The priority goes to the graphics card first of course depending on your budget, but if you can afford a good processor and graphics card at the same time, then consider doing so.

It won't bring about an improvement enough to make you prioritize dual channel over capacity on a single stick .