model         year  code name  fab ( nm ) bus interface  transistor count (millions) memory max ( mib )  core ( mhz ) memory ( mhz )   type  bus width ( bit )  directx  shader model  opengl                 maximum resolution iceq4 cooling system              notes
0                   his hd4850 (512 mb)    june 2008  rv770 pro          55  pcie 2.0 x16                          956                512           625     993 / 1986  gddr3                256     10.1           4.1     2.0  two x 25601600 (dual dual - link)                   no  uvd 2 , powerplay
1  his hd4850 iceq 4 (512 mb / 1024 mb)  august 2008  rv770 pro          55  pcie 2.0 x16                          956         512 / 1024           625     993 / 1986  gddr3                256     10.1           4.1     2.0  two x 25601600 (dual dual - link)                  yes  uvd 2 , powerplay
2      his hd4850 iceq 4 turbo (512 mb)  august 2008  rv770 pro          55  pcie 2.0 x16                          956                512           650    1000 / 2000  gddr3                256     10.1           4.1     2.0  two x 25601600 (dual dual - link)                  yes  uvd 2 , powerplay
3     his hd4850 iceq 4 turbox (512 mb)          tba  rv770 pro          55  pcie 2.0 x16                          956                512           685    1100 / 2200  gddr3                256     10.1           4.1     2.0  two x 25601600 (dual dual - link)                  yes  uvd 2 , powerplay
4         his hd4870 (512 mb / 1024 mb)    june 2008   rv770 xt          55  pcie 2.0 x16                          956         512 / 1024           750     900 / 3600  gddr5                256     10.1           4.1     2.0  two x 25601600 (dual dual - link)                   no  uvd 2 , powerplay
5            his hd 4870 turbo (512 mb)          tba   rv770 xt          55  pcie 2.0 x16                          956                512           780    1000 / 4000  gddr5                256     10.1           4.1     2.0  two x 25601600 (dual dual - link)                   no  uvd 2 , powerplay

Table as JSON:
{"model":{"0":"his hd4850 (512 mb)","1":"his hd4850 iceq 4 (512 mb \/ 1024 mb)","2":"his hd4850 iceq 4 turbo (512 mb)","3":"his hd4850 iceq 4 turbox (512 mb)","4":"his hd4870 (512 mb \/ 1024 mb)","5":"his hd 4870 turbo (512 mb)"},"year":{"0":"june 2008","1":"august 2008","2":"august 2008","3":"tba","4":"june 2008","5":"tba"},"code name":{"0":"rv770 pro","1":"rv770 pro","2":"rv770 pro","3":"rv770 pro","4":"rv770 xt","5":"rv770 xt"},"fab ( nm )":{"0":55,"1":55,"2":55,"3":55,"4":55,"5":55},"bus interface":{"0":"pcie 2.0 x16","1":"pcie 2.0 x16","2":"pcie 2.0 x16","3":"pcie 2.0 x16","4":"pcie 2.0 x16","5":"pcie 2.0 x16"},"transistor count (millions)":{"0":956,"1":956,"2":956,"3":956,"4":956,"5":956},"memory max ( mib )":{"0":"512","1":"512 \/ 1024","2":"512","3":"512","4":"512 \/ 1024","5":"512"},"core ( mhz )":{"0":625,"1":625,"2":650,"3":685,"4":750,"5":780},"memory ( mhz )":{"0":"993 \/ 1986","1":"993 \/ 1986","2":"1000 \/ 2000","3":"1100 \/ 2200","4":"900 \/ 3600","5":"1000 \/ 4000"},"type":{"0":"gddr3","1":"gddr3","2":"gddr3","3":"gddr3","4":"gddr5","5":"gddr5"},"bus width ( bit )":{"0":256,"1":256,"2":256,"3":256,"4":256,"5":256},"directx":{"0":10.1,"1":10.1,"2":10.1,"3":10.1,"4":10.1,"5":10.1},"shader model":{"0":4.1,"1":4.1,"2":4.1,"3":4.1,"4":4.1,"5":4.1},"opengl":{"0":2.0,"1":2.0,"2":2.0,"3":2.0,"4":2.0,"5":2.0},"maximum resolution":{"0":"two x 25601600 (dual dual - link)","1":"two x 25601600 (dual dual - link)","2":"two x 25601600 (dual dual - link)","3":"two x 25601600 (dual dual - link)","4":"two x 25601600 (dual dual - link)","5":"two x 25601600 (dual dual - link)"},"iceq4 cooling system":{"0":"no","1":"yes","2":"yes","3":"yes","4":"no","5":"no"},"notes":{"0":"uvd 2 , powerplay","1":"uvd 2 , powerplay","2":"uvd 2 , powerplay","3":"uvd 2 , powerplay","4":"uvd 2 , powerplay","5":"uvd 2 , powerplay"}}