Radeon R9 270X and Radeon HD 6990 - video card comparison
Passmark - benchmark score Radeon R9 270X vs Radeon HD 6990
Radeon R9 270X
5036
Radeon HD 6990
3103
Radeon R9 270X
Radeon HD 6990
Architecture
GCN (2011−2017)
TeraScale 3 (2010−2013)
GPU code name
Curacao XT
Antilles
Market segment
Desktop
Desktop
Release date
October 2013
March 2011
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2 x 6-pin
2x 8-pin
Boost clock speed
1050 MHz
-
Core clock speed
-
830 MHz
Floating-point performance
2,688 gflops
2x 2,549.8 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
2,640 million
Pipelines / CUDA cores
1280
1536
Power consumption (TDP)
180 Watt
375 Watt
Texture fill rate
84.00
79.68
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
5000 MHz
Memory bandwidth
179.2 GB/s
160.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 4x mini-DisplayPort
Eyefinity
+
-
HDMI
+
-
DisplayPort support
+
-
DirectX
DirectX® 12
11.2 (11_0)
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
+
N/A
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-