Radeon R9 270X and GeForce GT 650M Mac Edition - video card comparison
Radeon R9 270X
GeForce GT 650M Mac Edition
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Curacao XT
GK107
Market segment
Desktop
Desktop
Release date
October 2013
July 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2 x 6-pin
-
Boost clock speed
1050 MHz
-
Core clock speed
-
900 MHz
Floating-point performance
2,688 gflops
691.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
1,270 million
Pipelines / CUDA cores
1280
384
Power consumption (TDP)
180 Watt
45 Watt
Texture fill rate
84.00
28.80
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
-
5016 MHz
Memory bandwidth
179.2 GB/s
80.26 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.0
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
+
1.1.126
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-