GeForce GTX 660M and Radeon RX 6800 XT - video card comparison
Passmark - benchmark score GeForce GTX 660M vs Radeon RX 6800 XT
GeForce GTX 660M
1478
Radeon RX 6800 XT
25787
GeForce GTX 660M
Radeon RX 6800 XT
Architecture
Kepler (2012−2018)
Navi / RDNA2 (2020−2022)
GPU code name
N13E-GE
Navi 21
Market segment
Laptop
Desktop
Release date
March 2012
November 2020
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 4.0 x16
Supplementary power connectors
-
2x 8-pin
SLI options
+
-
Boost clock speed
950 MHz
2250 MHz
Core clock speed
835 MHz
1825 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
1,270 million
26,800 million
Pipelines / CUDA cores
384
4608
Power consumption (TDP)
50 Watt
300 Watt
Texture fill rate
30.4 billion/sec
648.0
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
16 GB
Memory bus width
128bit
256 Bit
Memory clock speed
2000 MHz
16000 MHz
Memory bandwidth
64.0 GB/s
512.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x HDMI, 2x DisplayPort, 1x USB Type-C
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 Ultimate (12_2)
CUDA
+
-
OpenCL
1.1
2.0
OpenGL
4.5
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2
Optimus
+
-