Radeon HD 6990 and Radeon R9 270 - video card comparison
Passmark - benchmark score Radeon HD 6990 vs Radeon R9 270
Radeon HD 6990
3103
Radeon R9 270
4435
Radeon HD 6990
Radeon R9 270
Architecture
TeraScale 3 (2010−2013)
GCN 1.0 (2012−2020)
GPU code name
Antilles
Curacao
Market segment
Desktop
Desktop
Release date
March 2011
November 2013
Bus support
-
PCIe 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
1 x 6-pin
Boost clock speed
-
925 MHz
Core clock speed
830 MHz
-
Floating-point performance
2x 2,549.8 gflops
2,368 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
2,640 million
2,800 million
Pipelines / CUDA cores
1536
1280
Power consumption (TDP)
375 Watt
150 Watt
Texture fill rate
79.68
74.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
5000 MHz
-
Memory bandwidth
160.0 GB/s
179.2 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
-
1
HDMI
-
+
DisplayPort support
-
+
DirectX
11.2 (11_0)
DirectX® 12
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
+
AppAcceleration
-
-
CrossFire
-
1
DDMA audio
-
+
Enduro
-
-
FreeSync
-
1
HD3D
-
+
LiquidVR
-
1
PowerTune
-
-
TressFX
-
1
TrueAudio
-
+
UVD
-
+
ZeroCore
-
-