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So I have 20-something 2.5" SATA 500gb hard drives procured from various reclaimed PCs. Right now they're just collecting dust. I want to put them to use in some kind of home server/ NAS. What's an efficient (cheap) way to hook them up? For any ground-up build I would need to get a case...

My motherboard(ASUS M2NA68 AM) is damaged and am looking for a new board.I have a DDR2 RAM and AMD SEMPRON 145 Processor with me.So kindly suggest me a board with maximum graphics where I can use the same ram and processor that am already having with me.

Just wondering just starting to learn about computers, but what is the difference between EVGA 04G-P4-3748-KR GeForce GT 740 Superclocked 4GB 128-Bit GDDR5 PCI Express 3.0 Video Card and a MSI GTX 980 GAMING 4G GeForce GTX 980 4GB 256-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support...