Radeon R9 270X and Radeon HD 6870 - video card comparison
Passmark - benchmark score Radeon R9 270X vs Radeon HD 6870
Radeon R9 270X
5036
Radeon HD 6870
2285
Radeon R9 270X
Radeon HD 6870
Architecture
GCN (2011−2017)
Terascale 2 (2009−2015)
GPU code name
Curacao XT
RV940 Barts
Market segment
Desktop
Desktop
Release date
October 2013
October 2010
Bus support
PCIe 3.0
PCIe 2.0 x16
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2 x 6-pin
2x 6-pin
Boost clock speed
1050 MHz
900 MHz
Floating-point performance
2,688 gflops
2,016.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
1,700 million
Pipelines / CUDA cores
1280
1120
Power consumption (TDP)
180 Watt
151 Watt
Texture fill rate
84.00
50.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
1050 MHz
Memory bandwidth
179.2 GB/s
134.4 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
+
1
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
+
-
AppAcceleration
+
-
CrossFire
1
1
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-