I have a HIS Radeon HD 4850 512MB graphic cards and i am a little confused on my overclocking results. The stock speeds are 650core 1000memory and i use MSIafterburner to overclock. My core seems to overclock fine around 720mhz but my memory i cant even move 1mhz without it crashing my computer. I'm not really concerned about the overclocking i am just curious as to why my memory wont even move 1mhz. I looked up some hd 4850 overclocks and most of them at least got the memory to 1100mhz.
Oh and my specs are GA-Z77X-UD5H motherboard, 2500k cpu, G.SKILL Ripjaws X Series 8GB (2 x 4GB) 1600 ram, and a OCZ ModXStream Pro 600W psu so yes my graphic card is really out of date for my build i decided to wait 2 months and get a new graphic card for my birthday.
My card runs at 75C full load with occt and my computer crashed before i even get to stress test it as soon as i go to 1001mhz my computer crashes and like i said before i did some research and most 4850 get around 1100mhz _zxzxzx_ also said he got the same card as me to 1100mhz. To tell you the truth i don't really care about overclocking my card I'm just curious as to why it crashes even 1mhz above 1000 when i have read people overclocking 4850 past that.