Radeon RX 7900 XT vs GeForce GTX 660
We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 7900 XT 's Advantages
Released 10 years and 2 months late
Boost Clock has increased by 132% (2394MHz vs 1032MHz)
More VRAM (20GB vs 2GB)
Larger VRAM bandwidth (800.0GB/s vs 144.2GB/s)
4416 additional rendering cores
GeForce GTX 660 's Advantages
Lower TDP (140W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 7900 XT
+2498%
51480
GeForce GTX 660
1981
3DMark Time Spy
Radeon RX 7900 XT
+2146%
26829
GeForce GTX 660
1194
3DMark Time Spy Extreme
Radeon RX 7900 XT
+4950%
13130
GeForce GTX 660
260
Blender
Radeon RX 7900 XT
+3418%
3905
GeForce GTX 660
111
Graphics Card
Nov 2022
Release Date
Sep 2012
Navi III
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1387 MHz
Base Clock
980 MHz
2394 MHz
Boost Clock
1032 MHz
2500 MHz
Memory Clock
1502 MHz
Memory
20GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
320bit
Memory Bus
192bit
800.0GB/s
Bandwidth
144.2GB/s
Render Config
84
Compute Units
-
5376
Shading Units
960
336
TMUs
80
192
ROPs
24
84
RT Cores
-
256 KB per Array
L1 Cache
16 KB (per SMX)
6 MB
L2 Cache
384 KB
80 MB
L3 Cache
-
Theoretical Performance
459.6 GPixel/s
Pixel Rate
20.64 GPixel/s
804.4 GTexel/s
Texture Rate
82.56 GTexel/s
103.0 TFLOPS
FP16 (half)
-
51.48 TFLOPS
FP32 (float)
1.981 TFLOPS
1.609 TFLOPS
FP64 (double)
82.56 GFLOPS
Board Design
300W
TDP
140W
700 W
Suggested PSU
300 W
1x HDMI 2.1a
2x DisplayPort 2.1
1x USB Type-C
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
Navi 31
GPU Name
GK106
Navi 31 XT
(215-145000156)
GPU Variant
GK106-400-A1
RDNA 3.0
Architecture
Kepler
TSMC
Foundry
TSMC
5 nm
Process Size
28 nm
57.7 billion
Transistors
2.54 billion
529 mm²
Die Size
221 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.2
OpenCL
3.0
1.3
Vulkan
1.1
-
CUDA
3.0
6.7
Shader Model
5.1
