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 HD 6850 X2
CORE STATE
Barts
VRAM
2 GB
CLOCK SPEED
—
TDP
254 W
BUS WIDTH
256 bit
ARCHITECTURE
TeraScale 2
PROCESS
40 nm
LAUNCH DATE
2011
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
660M
HD 6850 X2
Core Specs
Shading Units
384
960
+150.0%
Shaders
384
960
+150.0%
TMUs
24
48
+100.0%
ROPs
16
32
+100.0%
Compute Units
6
12
+100.0%
Clocks
Base Clock
1500 MHz
—
Boost Clock
1900 MHz
—
GPU Clock
—
800 MHz
Memory Clock
System Shared
1050 MHz
4.2 Gbps effective
Memory
Memory Size
System Shared
2 GB
VRAM (MB)
—
2,048
Memory Type
System Shared
GDDR5
Memory Bus
System Shared
256 bit
Bandwidth
System Dependent
134.4 GB/s
Cache
L1 Cache
128 KB per Array
8 KB (per CU)
L2 Cache
2 MB
512 KB
L0 Cache
32 KB per WGP
—
Performance
Pixel Rate
30.40 GPixel/s
25.60 GPixel/s
Texture Rate
45.60 GTexel/s
38.40 GTexel/s
FP32 (TFLOPS)
1,459.2 GFLOPS
1.536 TFLOPS
FP64 (TFLOPS)
91.20 GFLOPS (1:16)
—
FP16 (TFLOPS)
2.918 TFLOPS (2:1)
—
AI/RT
RT Cores
6
—
Power
TDP
40 W
254 W
TDP (W)
40
254
+535.0%
Suggested PSU
—
600 W
Power Connectors
None
2x 8-pin
Architecture
Architecture
RDNA 2.0
TeraScale 2
GPU Name
Rembrandt
Barts
Generation
Navi II IGP
(Rembrandt Mobile)
Northern Islands
(HD 6800)
Process Size
6 nm
40 nm
Transistors
13,100 million
1,700 million
Die Size
208 mm²
255 mm²
Foundry
TSMC
TSMC
Density
63.0M / mm²
6.7M / mm²
API Support
DirectX
12 Ultimate (12_2)
11.2 (11_0)
OpenGL
4.6
4.4
Vulkan
1.4
—
OpenCL
2.0
1.2
Shader Model
6.8
5.0
Physical
Slot Width
IGP
Dual-slot
Outputs
Portable Device Dependent
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Bus Interface
PCIe 4.0 x8
PCIe 2.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Vega II IGP
Evergreen
Successor
Navi III IGP
Southern Islands