GeForce GTX 660 Ti and Radeon RX 6900 XT - video card comparison
Passmark - benchmark score GeForce GTX 660 Ti vs Radeon RX 6900 XT
GeForce GTX 660 Ti
4547
Radeon RX 6900 XT
27641
GeForce GTX 660 Ti
Radeon RX 6900 XT
Architecture
Kepler (2012−2018)
Navi / RDNA2 (2020−2022)
GPU code name
GK104
Navi 21
Market segment
Desktop
Desktop
Release date
August 2012
December 2020
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x16
Supplementary power connectors
Two 6-pin
2x 8-pin
SLI options
+
-
Boost clock speed
980 MHz
2250 MHz
Core clock speed
915 MHz
1825 MHz
CUDA cores
1344
-
Floating-point performance
2,459.5 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
3,540 million
26,800 million
Pipelines / CUDA cores
1344
5120
Power consumption (TDP)
150 Watt
300 Watt
Texture fill rate
102.5 billion/sec
720.0
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
16 GB
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
16000 MHz
Memory bandwidth
144.2 GB/s
512.0 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x HDMI, 2x DisplayPort, 1x USB Type-C
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
+
-
OpenCL
1.2
2.1
OpenGL
4.3
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-