GPU Comparison
RADEON
AMD Radeon 660M
CORE STATE
Rembrandt
VRAM
System Shared
CLOCK SPEED
1900 MHz
TDP
40 W
BUS WIDTH
System Shared
ARCHITECTURE
RDNA 2.0
PROCESS
6 nm
LAUNCH DATE
2022
VS
RADEON
Radeon Pro 580X
CORE STATE
Ellesmere
VRAM
8 GB
CLOCK SPEED
1200 MHz
TDP
185 W
BUS WIDTH
256 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2019
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
660M
Pro 580X
Core Specs
Shading Units
384
2,304
+500.0%
Shaders
384
2,304
+500.0%
TMUs
24
144
+500.0%
ROPs
16
32
+100.0%
Compute Units
6
36
+500.0%
Clocks
Base Clock
1500 MHz
1100 MHz
Boost Clock
1900 MHz
1200 MHz
Memory Clock
System Shared
1710 MHz
6.8 Gbps effective
Memory
Memory Size
System Shared
8 GB
VRAM (MB)
—
8,192
Memory Type
System Shared
GDDR5
Memory Bus
System Shared
256 bit
Bandwidth
System Dependent
218.9 GB/s
Cache
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
2 MB
2 MB
L0 Cache
32 KB per WGP
—
Performance
Pixel Rate
30.40 GPixel/s
38.40 GPixel/s
Texture Rate
45.60 GTexel/s
172.8 GTexel/s
FP32 (TFLOPS)
1,459.2 GFLOPS
5.530 TFLOPS
FP64 (TFLOPS)
91.20 GFLOPS (1:16)
345.6 GFLOPS (1:16)
FP16 (TFLOPS)
2.918 TFLOPS (2:1)
5.530 TFLOPS (1:1)
AI/RT
RT Cores
6
—
Power
TDP
40 W
185 W
TDP (W)
40
185
+362.5%
Power Connectors
None
—
Architecture
Architecture
RDNA 2.0
GCN 4.0
GPU Name
Rembrandt
Ellesmere
Generation
Navi II IGP
(Rembrandt Mobile)
Radeon Pro Mac
(500X Series)
Process Size
6 nm
14 nm
Transistors
13,100 million
5,700 million
Die Size
208 mm²
232 mm²
Foundry
TSMC
GlobalFoundries
Density
63.0M / mm²
24.6M / mm²
API Support
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenGL
4.6
4.6
Vulkan
1.4
1.3
OpenCL
2.0
2.1
Shader Model
6.8
6.7
Physical
Slot Width
IGP
IGP
Outputs
Portable Device Dependent
2x HDMI 2.0b
Bus Interface
PCIe 4.0 x8
Apple MPX
Other
Production
End-of-life
End-of-life
Predecessor
Vega II IGP
—
Successor
Navi III IGP
—