Radeon HD 7850 and Radeon HD 4770 - video card comparison
Passmark - benchmark score Radeon HD 7850 vs Radeon HD 4770
Radeon HD 7850
3976
Radeon HD 4770
935
Radeon HD 7850
Radeon HD 4770
Architecture
GCN 1.0 (2012−2020)
TeraScale (2005−2013)
GPU code name
Pitcairn
RV740
Market segment
Desktop
Desktop
Release date
March 2012
April 2009
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin
Boost clock speed
1000 MHz
-
Core clock speed
-
750 MHz
Floating-point performance
1,761 gflops
960.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
826 million
Pipelines / CUDA cores
1024
640
Power consumption (TDP)
130 Watt
80 Watt
Texture fill rate
55.04
24.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1200 MHz
3200 MHz
Memory bandwidth
153.6 GB/s
51.2 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
12
10.1 (10_1)
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
+
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-