GeForce 845M and Radeon HD 7770M - video card comparison
GeForce 845M
Radeon HD 7770M
Architecture
Maxwell (2014−2018)
GCN (2011−2017)
GPU code name
GM108
Chelsea XT
Market segment
Laptop
Laptop
Release date
March 2014
April 2012
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Boost clock speed
1150 MHz
-
Core clock speed
1071 MHz
675 MHz
Floating-point performance
883.7 gflops
691.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,870 million
1,500 million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
45 Watt
32 Watt
Texture fill rate
37.63
21.60
Memory type
DDR3, GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
64/128 Bit
128 Bit
Memory clock speed
2000 - 5000 MHz
4000 MHz
Memory bandwidth
40.1 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_1)
CUDA
+
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131
Optimus
+
-