AMD Radeon 660M vs AMD Radeon HD 7870 GHz Edition
GPU · Specs Compare
Graphics Card
Release Date
Jan 2022
Mar 2012
Generation
Rembrandt
Southern Islands
Type
Integrated
Desktop
Bus Interface
PCIe 4.0 x8
PCIe 3.0 x16
Clock Speeds
Base Clock
1500 MHz
—
Boost Clock
1900 MHz
—
Memory Clock
System Shared
1200 MHz
Memory
Memory Size
System Shared
2GB
Memory Type
System Shared
GDDR5
Memory Bus
System Shared
256bit
Bandwidth
System Dependent
153.6GB/s
Render Config
Compute Units
6
20
Shading Units
384
1280
TMUs
24
80
ROPs
16
32
RT Cores
6
—
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
2 MB
512 KB
Theoretical Performance
Pixel Rate
30.40 GPixel/s
32.00 GPixel/s
Texture Rate
45.60 GTexel/s
80.00 GTexel/s
FP16 (half)
2.918 TFLOPS
—
FP32 (float)
1459 GFLOPS
2.560 TFLOPS
FP64 (double)
91.20 GFLOPS
160.0 GFLOPS
Graphics Processor
GPU Name
Rembrandt
Pitcairn
Architecture
RDNA 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
6 nm
28 nm
Transistors
13.1 billion
2.8 billion
Die Size
210 mm²
212 mm²
GPU Variant
—
Pitcairn XT(215-0828047)
Board Design
TDP
15W
175W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
2x 6-pin
Suggested PSU
—
450 W
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.0
1.2
Vulkan
1.2
1.2
Shader Model
6.5
5.1
Benchmark
3DMark Time Spy
1,537
—
3DMark Time Spy Extreme
701
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.