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 7950
CORE STATE
Tahiti
VRAM
3 GB
CLOCK SPEED
—
TDP
200 W
BUS WIDTH
384 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2012
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
660M
HD 7950
Core Specs
Shading Units
384
1,792
+366.7%
Shaders
384
1,792
+366.7%
TMUs
24
112
+366.7%
ROPs
16
32
+100.0%
Compute Units
6
28
+366.7%
Clocks
Base Clock
1500 MHz
—
Boost Clock
1900 MHz
—
GPU Clock
—
800 MHz
Memory Clock
System Shared
1250 MHz
5 Gbps effective
Memory
Memory Size
System Shared
3 GB
VRAM (MB)
—
3,072
Memory Type
System Shared
GDDR5
Memory Bus
System Shared
384 bit
Bandwidth
System Dependent
240.0 GB/s
Cache
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
2 MB
768 KB
L0 Cache
32 KB per WGP
—
Performance
Pixel Rate
30.40 GPixel/s
25.60 GPixel/s
Texture Rate
45.60 GTexel/s
89.60 GTexel/s
FP32 (TFLOPS)
1,459.2 GFLOPS
2.867 TFLOPS
FP64 (TFLOPS)
91.20 GFLOPS (1:16)
716.8 GFLOPS (1:4)
FP16 (TFLOPS)
2.918 TFLOPS (2:1)
—
AI/RT
RT Cores
6
—
Power
TDP
40 W
200 W
TDP (W)
40
200
+400.0%
Suggested PSU
—
550 W
Power Connectors
None
2x 6-pin
Architecture
Architecture
RDNA 2.0
GCN 1.0
GPU Name
Rembrandt
Tahiti
Generation
Navi II IGP
(Rembrandt Mobile)
Southern Islands
(HD 7900)
Process Size
6 nm
28 nm
Transistors
13,100 million
4,313 million
Die Size
208 mm²
352 mm²
Foundry
TSMC
TSMC
Density
63.0M / mm²
12.3M / mm²
API Support
DirectX
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
Vulkan
1.4
1.2.170
OpenCL
2.0
2.1 (1.2)
Shader Model
6.8
6.5 (5.1)
Physical
Slot Width
IGP
Dual-slot
Length
—
278 mm
10.9 inches
Height
—
111 mm
4.4 inches
Outputs
Portable Device Dependent
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Bus Interface
PCIe 4.0 x8
PCIe 3.0 x16
Other
Launch Price
—
449 USD
Production
End-of-life
End-of-life
Predecessor
Vega II IGP
Northern Islands
Successor
Navi III IGP
Sea Islands