AMD Radeon RX 6800 XT vs NVIDIA GeForce GTX 490

VS

AMD Radeon RX 6800 XT

NVIDIA GeForce GTX 490

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 1536MB VRAM GeForce GTX 490 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)

Radeon RX 6800 XT +1678%

20.74 TFLOPS

GeForce GTX 490

1.166 TFLOPS

Radeon RX 6800 XT

VS

GeForce GTX 490

Graphics Card

Oct 2020

Release Date

Unknown

Navi II

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1825 MHz

Base Clock

-

2250 MHz

Boost Clock

-

2000 MHz

Memory Clock

854 MHz

Memory

16GB

Memory Size

1536MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

384bit

512.0GB/s

Bandwidth

164.0GB/s

Render Config

72

Compute Units

-

SM Count

15

4608

Shading Units

480

288

TMUs

60

128

ROPs

48

-

72

RT Cores

-

128 KB per Array

L1 Cache

64 KB (per SM)

4 MB

L2 Cache

768 KB

128 MB

L3 Cache

-

Theoretical Performance

288.0 GPixel/s

Pixel Rate

18.24 GPixel/s

648.0 GTexel/s

Texture Rate

36.48 GTexel/s

41.47 TFLOPS

FP16 (half)

-

20.74 TFLOPS

FP32 (float)

1166 GFLOPS

1296 GFLOPS

FP64 (double)

145.8 GFLOPS

Board Design

300W

TDP

365W

700 W

Suggested PSU

750 W

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

Outputs

3x DVI 1x mini-DisplayPort

2x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Navi 21

GPU Name

GF100

Navi 21 XT (215-121000177)

GPU Variant

GF100-375-A3

RDNA 2.0

Architecture

Fermi

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

26.8 billion

Transistors

3.1 billion

520 mm²

Die Size

529 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.3

Vulkan

N/A

-

CUDA

2.0

6.5

Shader Model

5.1

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