Replacement of Radeon HD 4830 using faster GDDR5 memories but on 128bit bus with PCB from HD 4870. Vlask's chip: PowerColor AX4730 512MD5-PPowerColor AX4730 512MD5-P PowerColor AX4730 512MD5-PPowerColor AX4730 512MD5-P PowerColor AX4730 512MD5-PPowerColor AX4730 512MD5-P