Radeon RX 6700 XT vs GeForce GTX 660
We compared two Desktop platform GPUs: 12GB VRAM Radeon RX 6700 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 6700 XT 's Advantages
Released 8 years and 6 months late
Boost Clock has increased by 150% (2581MHz vs 1032MHz)
More VRAM (12GB vs 2GB)
Larger VRAM bandwidth (384.0GB/s vs 144.2GB/s)
1600 additional rendering cores
GeForce GTX 660 's Advantages
Lower TDP (140W vs 230W)
Score
Benchmark
FP32 (float)
Radeon RX 6700 XT
+566%
13210
GeForce GTX 660
1981
3DMark Time Spy
Radeon RX 6700 XT
+972%
12804
GeForce GTX 660
1194
3DMark Time Spy Extreme
Radeon RX 6700 XT
+2191%
5957
GeForce GTX 660
260
Blender
Radeon RX 6700 XT
+1474%
1748
GeForce GTX 660
111
Graphics Card
Mar 2021
Release Date
Sep 2012
Navi II
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
2321 MHz
Base Clock
980 MHz
2581 MHz
Boost Clock
1032 MHz
2000 MHz
Memory Clock
1502 MHz
Memory
12GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
192bit
Memory Bus
192bit
384.0GB/s
Bandwidth
144.2GB/s
Render Config
40
Compute Units
-
2560
Shading Units
960
160
TMUs
80
64
ROPs
24
40
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per SMX)
3 MB
L2 Cache
384 KB
96 MB
L3 Cache
-
Theoretical Performance
165.2 GPixel/s
Pixel Rate
20.64 GPixel/s
413.0 GTexel/s
Texture Rate
82.56 GTexel/s
26.43 TFLOPS
FP16 (half)
-
13.21 TFLOPS
FP32 (float)
1.981 TFLOPS
825.9 GFLOPS
FP64 (double)
82.56 GFLOPS
Board Design
230W
TDP
140W
550 W
Suggested PSU
300 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
Navi 22
GPU Name
GK106
Navi 22 XT
(215-127000006)
GPU Variant
GK106-400-A1
RDNA 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
17.2 billion
Transistors
2.54 billion
335 mm²
Die Size
221 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.1
OpenCL
3.0
1.3
Vulkan
1.1
-
CUDA
3.0
6.5
Shader Model
5.1
