AMD Radeon 660M vs AMD Radeon HD 6990
GPU Specs Compare
Graphics Card
Release Date
Jan 2022
Mar 2011
Generation
Rembrandt
Northern Islands
Type
Integrated
Desktop
Bus Interface
PCIe 4.0 x8
PCIe 2.0 x16
Clock Speeds
Base Clock
1500 MHz
-
Boost Clock
1900 MHz
-
Memory Clock
System Shared
1250 MHz
Memory
Memory Size
System Shared
2GB
Memory Type
System Shared
GDDR5
Memory Bus
System Shared
256bit
Bandwidth
System Dependent
160.0GB/s
Render Config
Compute Units
6
24
Shading Units
384
1536
TMUs
24
96
ROPs
16
32
RT Cores
6
-
L1 Cache
128 KB per Array
8 KB (per CU)
L2 Cache
2 MB
512 KB
Theoretical Performance
Pixel Rate
30.40 GPixel/s
26.56 GPixel/s
Texture Rate
45.60 GTexel/s
79.68 GTexel/s
FP16 (half)
2.918 TFLOPS
-
FP32 (float)
1459 GFLOPS
2.550 TFLOPS
FP64 (double)
91.20 GFLOPS
637.4 GFLOPS
Graphics Processor
GPU Name
Rembrandt
Antilles
Architecture
RDNA 2.0
TeraScale 3
Foundry
TSMC
TSMC
Process Size
6 nm
40 nm
Transistors
13.1 billion
2.64 billion
Die Size
210 mm²
389 mm²
GPU Variant
-
Antilles XT(215-0807027)
Board Design
TDP
15W
375W
Outputs
No outputs
1x DVI4x mini-DisplayPort 1.2
Power Connectors
None
2x 8-pin
Suggested PSU
-
750 W
Graphics Features
DirectX
12 Ultimate (12_2)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
2.0
1.2
Vulkan
1.2
N/A
Shader Model
6.5
5.0
📊 Benchmark
3DMark Time Spy
1,537
-
3DMark Time Spy Extreme
701
-