Radeon R9 390X and Radeon HD 6870 - video card comparison
Passmark - benchmark score Radeon R9 390X vs Radeon HD 6870
Radeon R9 390X
9722
Radeon HD 6870
2285
Radeon R9 390X
Radeon HD 6870
Architecture
GCN (2011−2017)
Terascale 2 (2009−2015)
GPU code name
Grenada XT
RV940 Barts
Market segment
Desktop
Desktop
Release date
June 2015
October 2010
Bus support
PCIe 3.0
PCIe 2.0 x16
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
2x 6-pin
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
900 MHz
Floating-point performance
5,914 gflops
2,016.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
6,200 million
1,700 million
Pipelines / CUDA cores
2816
1120
Power consumption (TDP)
275 Watt
151 Watt
Texture fill rate
184.8
50.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
1 GB
Memory bus width
512 Bit
256 Bit
Memory clock speed
1050 MHz
1050 MHz
Memory bandwidth
384 GB/s
134.4 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
+
1
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
DirectX® 11
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.4
Shader Model
6.3
5.0
Vulkan
+
-
AppAcceleration
-
-
CrossFire
1
1
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-