 For RAM, well, same speed but different brands work. Yes, 4600G to 5600, yes, if adding a GPU, no, if you're already using the 4600G with a GPU and will be using the same GPU with the 5600. Mas maganda, ATX or ITX yung kasya sa case mo. If your case is ATX, use an ATX board. If ATX, ATX board. AIO for B450 MOBO, 99% of all current AIOs are compatible with this MOBO. The better question is, what AIO do you recommend for a specific CPU? Not what AIO goes well with what MOBO. ITX build for 50K, yes. AIO, an A320 MOBO, yes kaya but see answered question 4. 5700G with an A320 MOBO, yes that's fine. Gigabyte RMA, yes in the sense usually they will replace it, no in the sense that sometimes they take a long time. SSD Reco, team group MP33. Recommended Acerics GPUs? If looking for a budget card, yes. English only please, no, brush up on your Tagalog. Do we ship outside of Metro Manila? Yes we do. Long line on shop on Saturdays. For Saturday and Sunday, usually yes. Is that a self delivery? Nope, selling the 3900KF, yes.