Radeon HD 7950 and Radeon HD 3870 - video card comparison
Passmark - benchmark score Radeon HD 7950 vs Radeon HD 3870
Radeon HD 7950
4907
Radeon HD 3870
572
Radeon HD 7950
Radeon HD 3870
Architecture
GCN 1.0 (2012−2020)
TeraScale (2005−2013)
GPU code name
Tahiti
RV670
Market segment
Desktop
Desktop
Release date
January 2012
November 2007
Bus support
PCIe 3.0 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin
Boost clock speed
1250 MHz
-
Compute units
28
-
Core clock speed
-
777 MHz
Floating-point performance
2,867 gflops
497.3 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
4,313 million
666 million
Pipelines / CUDA cores
1792
320
Power consumption (TDP)
200 Watt
106 Watt
Texture fill rate
89.60
12.43
Memory type
GDDR5
GDDR4
Maximum RAM amount
3 GB
512 MB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1250 MHz
2252 MHz
Memory bandwidth
240 GB/s
72.06 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
1
-
Number of Eyefinity displays
6
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
10.1 (10_1)
Mantle
-
-
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
-
N/A
AppAcceleration
+
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
-
-
ZeroCore
+
-