enough psu for my Custom Rig

[JOHN PLAYER]

Is cooler master silent pro m2 850 watt power supply unit is enough for my v formula z, fx 8350 black edition,gtx 970???
in future am update my rig with sli enable dual gtx 970??
so i need 1000 watt or in future 850 watt is enough
give some suggestions

 

[Vosgy]

http://extreme.outervision.com/psucalculatorlite.jsp
Plug in everything and have a look.
With the massive power efficiency of the 970's I think you'll be able to run a pair even with a lot of extras on a 850w easily.

 

[Vosgy]

Also look at this http://www.tomshardware.com/forum/id-2263985/power-supply-tier-list.html when selecting a brand.

 

[HEXiT]

theres enough grunt in that psu to run 2 970's in sli. all told you will be pushing about 550w at full load in sli around 350-400 with a single card.
personally i would go with a 750w unit from enermax, seasonic as coolemaster psu's tend to be a bit hit and miss depending on which unit you go for.
the 1 you mention has pretty poor ripple suppression on the 12v rails and this could cause issues as the years roll on. (thats not definate, just likely)

 

[JOHN PLAYER]

in present i use only single card.
problem is overkill??
is overkill issues coming in 850 watt while using just single 970 and other stuff?

 

[HEXiT]

most psu's dont hit there 80+ efficiency until there loaded up to 50% or more. so yeah 850w for that build could be seen as overkill. but as your gonna add another card you will want a 700+ watt psu to give some headroom.