How much coolant for my loop?

xDarkxIdealsx

Honorable
Jul 10, 2013
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I'm making a water cooled rig, just got my motherboard (rampage iv black edition) and my thermal paste is coming tomorrow (gelid GC extreme), and i just ordered my cpu (i7 4820K), case (corsair 900d), radiators (2 x EK Coolstream XT480), gpu block (ek gtx970 gigabyte), pump (swiftech mcp655 with g1/4" thread mod), reservoir (EK X3 250mm). And i'm about to order my tubing (Primochill advanced LRT 3/8" x 1/2" clear), backplate for gpu and my coolant (Mayhem's Pastel Ice White) but i'm really hitting the end of my budget, i was barely able to squeeze in the first 1 liter bottle of mayhem's so i'm wondering if i would be able to get away with using just one bottle for now since i'm only doing cpu and a single gpu in the loop (planning on sli later, but not for a couple months or so) and getting the 2nd bottle later.

As i mentioned my loop consists of a cpu bock (haven't decided, thinking either apogee xl with custom ROG logo to match my asus ROG motherboard or the EK supremacy evo full nickel, what do yo guys think?) one gpu block, one 250mm tall reservoir and two 480mm radiators.