NVIDIA GeForce GTX 490 vs AMD Radeon RX 6800 XT
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 490 and 16GB VRAM Radeon RX 6800 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6800 XT 's Advantages
Boost Clock2250MHz
More VRAM (16GB vs 1536GB)
Larger VRAM bandwidth (512.0GB/s vs 164.0GB/s)
4128 additional rendering cores
Lower TDP (300W vs 365W)
Score
Benchmark
FP32 (float)
GeForce GTX 490
1.166 TFLOPS
Radeon RX 6800 XT
+1678%
20.74 TFLOPS
Graphics Card
Unknown
Release Date
Oct 2020
GeForce 400
Generation
Navi II
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 4.0 x16
Clock Speeds
-
Base Clock
1825 MHz
-
Boost Clock
2250 MHz
854 MHz
Memory Clock
2000 MHz
Memory
1536MB
Memory Size
16GB
GDDR5
Memory Type
GDDR6
384bit
Memory Bus
256bit
164.0GB/s
Bandwidth
512.0GB/s
Render Config
-
Compute Units
72
15
SM Count
-
480
Shading Units
4608
60
TMUs
288
48
ROPs
128
-
-
-
-
RT Cores
72
64 KB (per SM)
L1 Cache
128 KB per Array
768 KB
L2 Cache
4 MB
-
L3 Cache
128 MB
Theoretical Performance
18.24 GPixel/s
Pixel Rate
288.0 GPixel/s
36.48 GTexel/s
Texture Rate
648.0 GTexel/s
-
FP16 (half)
41.47 TFLOPS
1166 GFLOPS
FP32 (float)
20.74 TFLOPS
145.8 GFLOPS
FP64 (double)
1296 GFLOPS
Board Design
365W
TDP
300W
750 W
Suggested PSU
700 W
3x DVI
1x mini-DisplayPort
Outputs
1x HDMI 2.1
2x DisplayPort 1.4a
1x USB Type-C
2x 8-pin
Power Connectors
2x 8-pin
Graphics Processor
GF100
GPU Name
Navi 21
GF100-375-A3
GPU Variant
Navi 21 XT
(215-121000177)
Fermi
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
7 nm
3.1 billion
Transistors
26.8 billion
529 mm²
Die Size
520 mm²
Graphics Features
12 (11_0)
DirectX
12 Ultimate (12_2)
4.6
OpenGL
4.6
1.1
OpenCL
2.1
N/A
Vulkan
1.3
2.0
CUDA
-
5.1
Shader Model
6.5
