Radeon R9 390X and Radeon HD 7950 - video card comparison
Passmark - benchmark score Radeon R9 390X vs Radeon HD 7950
Radeon R9 390X
9722
Radeon HD 7950
4907
Radeon R9 390X
Radeon HD 7950
Architecture
GCN (2011−2017)
GCN 1.0 (2012−2020)
GPU code name
Grenada XT
Tahiti
Market segment
Desktop
Desktop
Release date
June 2015
January 2012
Bus support
PCIe 3.0
PCIe 3.0 x16
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
2x 6-pin
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
1250 MHz
Compute units
-
28
Floating-point performance
5,914 gflops
2,867 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
4,313 million
Pipelines / CUDA cores
2816
1792
Power consumption (TDP)
275 Watt
200 Watt
Texture fill rate
184.8
89.60
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
3 GB
Memory bus width
512 Bit
384 Bit
Memory clock speed
1050 MHz
1250 MHz
Memory bandwidth
384 GB/s
240 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
+
1
Number of Eyefinity displays
6
6
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
DirectX® 11
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
+
-
AppAcceleration
-
+
CrossFire
1
1
DDMA audio
+
-
Enduro
-
-
FreeSync
1
1
HD3D
-
-
PowerTune
+
+
TrueAudio
+
-
VCE
+
-
ZeroCore
-
+