I got a free EVGA X58 FTW3 motherboard which supports 24 gigs of ram with six slots. I think it's slightly used (could be unused) but still in great condition. I got 24 gigs of free ram as well (mushkin silverline that came in sets of 12 gigs (3x4). I read the manual and could easily use all 24 with the motherboard. But I also want the ASRock Z87 Extreme4, which supports 32 gigs of ram, but only four slots. Which motherboard should I use? If the ASRock, then can I use my ram in a 4x4 configuration?