Radeon R9 390X and Radeon HD 6990 - video card comparison
Passmark - benchmark score Radeon R9 390X vs Radeon HD 6990
Radeon R9 390X
9722
Radeon HD 6990
3103
Radeon R9 390X
Radeon HD 6990
Architecture
GCN (2011−2017)
TeraScale 3 (2010−2013)
GPU code name
Grenada XT
Antilles
Market segment
Desktop
Desktop
Release date
June 2015
March 2011
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
2x 8-pin
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
-
Core clock speed
-
830 MHz
Floating-point performance
5,914 gflops
2x 2,549.8 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
6,200 million
2,640 million
Pipelines / CUDA cores
2816
1536
Power consumption (TDP)
275 Watt
375 Watt
Texture fill rate
184.8
79.68
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
2 GB
Memory bus width
512 Bit
256 Bit
Memory clock speed
1050 MHz
5000 MHz
Memory bandwidth
384 GB/s
160.0 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 4x mini-DisplayPort
Eyefinity
+
-
Number of Eyefinity displays
6
-
HDMI
+
-
DisplayPort support
+
-
DirectX
DirectX® 12
11.2 (11_0)
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.4
Shader Model
6.3
5.0
Vulkan
+
N/A
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-