hightech information system 

Statements about this table:
the bus width (in bits) of the model whose core be 650 mhz be 256
the directx value of the model with a code name rv770 pro and a core bigger than 650 mhz be 101
the note record for the model his hd4850 (512 mb) be uvd 2 , powerplay
the directx of the model with a code name rv770 pro and a core bigger than 650.0 mhz be greater than 10.1
model
year
code name
fab ( nm )
bus interface
transistor count (millions)
memory max ( mib )
his hd4850 (512 mb)
june 2008
rv770 pro
55
pcie 2.0 x16
956
512
his hd4850 iceq 4 (512 mb / 1024 mb)
august 2008
rv770 pro
55
pcie 2.0 x16
956
512 / 1024
his hd4850 iceq 4 turbo (512 mb)
august 2008
rv770 pro
55
pcie 2.0 x16
956
512
his hd4850 iceq 4 turbox (512 mb)
tba
rv770 pro
55
pcie 2.0 x16
956
512
his hd4870 (512 mb / 1024 mb)
june 2008
rv770 xt
55
pcie 2.0 x16
956
512 / 1024
his hd 4870 turbo (512 mb)
tba
rv770 xt
55
pcie 2.0 x16
956
512
model
core ( mhz )
memory ( mhz )
type
bus width ( bit )
directx
his hd4850 (512 mb)
625
993 / 1986
gddr3
256
10.1
his hd4850 iceq 4 (512 mb / 1024 mb)
625
993 / 1986
gddr3
256
10.1
his hd4850 iceq 4 turbo (512 mb)
650
1000 / 2000
gddr3
256
10.1
his hd4850 iceq 4 turbox (512 mb)
685
1100 / 2200
gddr3
256
10.1
his hd4870 (512 mb / 1024 mb)
750
900 / 3600
gddr5
256
10.1
his hd 4870 turbo (512 mb)
780
1000 / 4000
gddr5
256
10.1
model
shader model
opengl
maximum resolution
iceq4 cooling system
notes
his hd4850 (512 mb)
4.1
2.0
two x 25601600 (dual dual - link)
no
uvd 2 , powerplay
his hd4850 iceq 4 (512 mb / 1024 mb)
4.1
2.0
two x 25601600 (dual dual - link)
yes
uvd 2 , powerplay
his hd4850 iceq 4 turbo (512 mb)
4.1
2.0
two x 25601600 (dual dual - link)
yes
uvd 2 , powerplay
his hd4850 iceq 4 turbox (512 mb)
4.1
2.0
two x 25601600 (dual dual - link)
yes
uvd 2 , powerplay
his hd4870 (512 mb / 1024 mb)
4.1
2.0
two x 25601600 (dual dual - link)
no
uvd 2 , powerplay
his hd 4870 turbo (512 mb)
4.1
2.0
two x 25601600 (dual dual - link)
no
uvd 2 , powerplay