 Really fast CPU with an average GPU, masisihira ba yung GPU? No, kahit gano ka po imbalance yung speed ng CPU in relation to the GPU, neither will harm the other. Ano UPS para sa laptop plus modem? But in general, I recommend 1200 VA for most work setup. Yung mga ibang stores na kailangan na pristine packaging para ibalik. At hardware sugar, hindi mo nga kailangan yung box let alone a pristine. You dim ram with a dim MOBO? Nope, not compatible. I3 to I5? Yes, you can upgrade if you stick to the same generation. In your case, second gen. If you want to upgrade to a higher gen, you'll need to check kung same socket ba yung higher gen na yun siyakin yung socket ng current MOBO. Best GPU for I3-6100? Regardless of what the CPU is, get the best GPU you can afford. Is the AK400 digital ITX? ITX refers to case sizes, not sizes of air coolers. If you mean kakasha ba siya sa ITX case? Kaya siguro in the larger ITX cases like the NR200P. BP249QGR monitor for Web Dev? So short answer, yes. But long answer, pwede siya, pero hindi siya bagay. Masasayong pera mo.