AMD Radeon RX 6600 XT vs NVIDIA GeForce GTX 680 Mac Edition
We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 2GB VRAM GeForce GTX 680 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6600 XT 's Advantages
Released 8 years and 3 months late
Boost Clock has increased by 145% (2589MHz vs 1058MHz)
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (256.0GB/s vs 192.3GB/s)
512 additional rendering cores
Lower TDP (160W vs 195W)
Score
Benchmark
FP32 (float)
Radeon RX 6600 XT
+226%
10.6 TFLOPS
GeForce GTX 680 Mac Edition
3.25 TFLOPS
Graphics Card
Jul 2021
Release Date
Apr 2013
Navi II
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x8
Bus Interface
PCIe 2.0 x16
Clock Speeds
1968 MHz
Base Clock
1006 MHz
2589 MHz
Boost Clock
1058 MHz
2000 MHz
Memory Clock
1502 MHz
Memory
8GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
128bit
Memory Bus
256bit
256.0GB/s
Bandwidth
192.3GB/s
Render Config
32
Compute Units
-
-
-
-
2048
Shading Units
1536
128
TMUs
128
64
ROPs
32
-
-
-
32
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
512 KB
32 MB
L3 Cache
-
Theoretical Performance
165.7 GPixel/s
Pixel Rate
33.86 GPixel/s
331.4 GTexel/s
Texture Rate
135.4 GTexel/s
21.21 TFLOPS
FP16 (half)
-
10.60 TFLOPS
FP32 (float)
3.250 TFLOPS
662.8 GFLOPS
FP64 (double)
135.4 GFLOPS
Board Design
160W
TDP
195W
450 W
Suggested PSU
450 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 23
GPU Name
GK104
Navi 23 XT
(215-130000006)
GPU Variant
GK104-400-A2
RDNA 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
11.06 billion
Transistors
3.54 billion
237 mm²
Die Size
294 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
6.7
Shader Model
5.1
