Radeon R9 270 and Radeon HD 6990M - video card comparison
Radeon R9 270
Radeon HD 6990M
Architecture
GCN 1.0 (2012−2020)
Terascale 2 (2009−2015)
GPU code name
Curacao
Blackcomb XTX
Market segment
Desktop
Laptop
Release date
November 2013
July 2011
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
1 x 6-pin
None
Boost clock speed
925 MHz
-
Core clock speed
-
715 MHz
Floating-point performance
2,368 gflops
1,601.6 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
1,700 million
Pipelines / CUDA cores
1280
1120
Power consumption (TDP)
150 Watt
100 Watt
Texture fill rate
74.00
40.04
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
900 MHz
Memory bandwidth
179.2 GB/s
115.2 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
1
-
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
-
-