AMD Radeon 660M vs AMD Radeon RX 6800 3456SP
GPU · Specs Compare
Graphics Card
Release Date
Jan 2022
Unknown
Generation
Rembrandt
Navi II
Type
Integrated
Desktop
Bus Interface
PCIe 4.0 x8
PCIe 4.0 x16
Clock Speeds
Base Clock
1500 MHz
1700 MHz
Boost Clock
1900 MHz
2250 MHz
Memory Clock
System Shared
2000 MHz
Memory
Memory Size
System Shared
16GB
Memory Type
System Shared
GDDR6
Memory Bus
System Shared
256bit
Bandwidth
System Dependent
512.0GB/s
Render Config
Compute Units
6
54
Shading Units
384
3456
TMUs
24
216
ROPs
16
96
RT Cores
6
54
L1 Cache
128 KB per Array
128 KB per Array
L2 Cache
2 MB
4 MB
L3 Cache
—
128 MB
Theoretical Performance
Pixel Rate
30.40 GPixel/s
216.0 GPixel/s
Texture Rate
45.60 GTexel/s
486.0 GTexel/s
FP16 (half)
2.918 TFLOPS
31.10 TFLOPS
FP32 (float)
1459 GFLOPS
15.55 TFLOPS
FP64 (double)
91.20 GFLOPS
972.0 GFLOPS
Graphics Processor
GPU Name
Rembrandt
Navi 21
Architecture
RDNA 2.0
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
6 nm
7 nm
Transistors
13.1 billion
26.8 billion
Die Size
210 mm²
520 mm²
GPU Variant
—
Navi 21 ES(215-121000066)
Board Design
TDP
15W
250W
Outputs
No outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
Power Connectors
None
2x 8-pin
Suggested PSU
—
600 W
Graphics Features
DirectX
12 Ultimate (12_2)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
2.0
2.1
Vulkan
1.2
1.3
Shader Model
6.5
6.8
Benchmark
3DMark Time Spy
1,537
—
3DMark Time Spy Extreme
701
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.