Radeon R7 250 and Radeon HD 7770M - video card comparison
Radeon R7 250
Radeon HD 7770M
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Oland XT
Chelsea XT
Market segment
Desktop
Laptop
Release date
October 2013
April 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Supplementary power connectors
N/A
-
Boost clock speed
1050 MHz
-
Core clock speed
-
675 MHz
Floating-point performance
716.8 gflops
691.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
950 million
1,500 million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
75 Watt
32 Watt
Texture fill rate
25.20
21.60
Memory type
DDR3, GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1150 MHz
4000 MHz
Memory bandwidth
72 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x VGA
No outputs
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 12
12 (11_1)
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
-
1.2.131
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-