AXLE RADEON 9600XT 128MB

There is picture on monitor but leters in POST are all mixed up (all kind of symbols allover the screen where ever is text present-but a lot of text is readeble). In BIOS there is normal blue colour of background but letters are also mixed up. No vertical or horizontal lines or other artefacts. GPU heated with no effect. APM-s and capacitors changed.
Memory?

P.S. Memory chips are HY5DU281622ET-33 (8 MODULES). I have 8 pcs of HY5DV281622DT-4S for changing. Is it going to work if I put that modules instead?