Radeon HD 7870 XT and Radeon HD 6870 - video card comparison
Passmark - benchmark score Radeon HD 7870 XT vs Radeon HD 6870
Radeon HD 7870 XT
4603
Radeon HD 6870
2285
Radeon HD 7870 XT
Radeon HD 6870
Architecture
GCN 1.0 (2012−2020)
Terascale 2 (2009−2015)
GPU code name
Tahiti
RV940 Barts
Market segment
Desktop
Desktop
Release date
November 2012
October 2010
Bus support
-
PCIe 2.0 x16
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
2x 6-pin
Boost clock speed
975 MHz
900 MHz
Core clock speed
925 MHz
-
Floating-point performance
2,995 gflops
2,016.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
1,700 million
Pipelines / CUDA cores
1536
1120
Power consumption (TDP)
185 Watt
151 Watt
Texture fill rate
93.60
50.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
6000 MHz
1050 MHz
Memory bandwidth
192.0 GB/s
134.4 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
1
HDMI
+
+
DisplayPort support
-
-
DirectX
12 (11_1)
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.2.131
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-