i have received a brand new V13 motherboard GH-032-53, bios B2110A D1010U. Installed a Mars pro805 SL and what i get is a blank screen after all. tried 3 of the same chip and still same result. finally i installed an apple70k (ice based clone) everything worked fine. so i think the mars 805 has big problem with v13. anyone has this problem so far? I have installed more than 100pcs v12's with mars805 and never had any problem.