GPU Comparison
RADEON
AMD Radeon R5 M255
CORE STATE
Topaz
VRAM
2 GB
CLOCK SPEED
940 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 3.0
PROCESS
28 nm
LAUNCH DATE
2014
VS
GEFORCE
GRID K2
CORE STATE
GK104
VRAM
4 GB
CLOCK SPEED
—
TDP
225 W
BUS WIDTH
256 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
R5 M255
GRID K2
Core Specs
Shading Units
384
1,536
+300.0%
Shaders
384
1,536
+300.0%
TMUs
24
128
+433.3%
ROPs
8
32
+300.0%
Compute Units
6
—
Clocks
Base Clock
925 MHz
—
Boost Clock
940 MHz
—
GPU Clock
—
745 MHz
Memory Clock
1000 MHz
2 Gbps effective
1250 MHz
5 Gbps effective
Memory
Memory Size
2 GB
4 GB
VRAM (MB)
2,048
4,096
+100.0%
Memory Type
DDR3
GDDR5
Memory Bus
128 bit
256 bit
Bandwidth
32.00 GB/s
160.0 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per SMX)
L2 Cache
256 KB
512 KB
Performance
Pixel Rate
7.520 GPixel/s
23.84 GPixel/s
Texture Rate
22.56 GTexel/s
95.36 GTexel/s
FP32 (TFLOPS)
721.9 GFLOPS
2.289 TFLOPS
FP64 (TFLOPS)
45.12 GFLOPS (1:16)
95.36 GFLOPS (1:24)
FP16 (TFLOPS)
721.9 GFLOPS (1:1)
—
Power
TDP
—
225 W
TDP (W)
—
225
Suggested PSU
—
550 W
Power Connectors
—
1x 6-pin + 1x 8-pin
Architecture
Architecture
GCN 3.0
Kepler
GPU Name
Topaz
GK104
Generation
Gem System
(R5 M200)
GRID
(K2)
Process Size
28 nm
28 nm
Transistors
1,550 million
3,540 million
Die Size
125 mm²
294 mm²
Foundry
TSMC
TSMC
Density
12.4M / mm²
12.0M / mm²
API Support
DirectX
12 (12_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.175
OpenCL
2.1
3.0
CUDA
—
3.0
Shader Model
6.5
6.5 (5.1)
Physical
Slot Width
—
Dual-slot
Length
—
267 mm
10.5 inches
Outputs
—
No outputs
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Launch Price
—
5,199 USD
Production
End-of-life
End-of-life
Predecessor
Solar System
—
Successor
Polaris Mobile
—