AMD Radeon RX 7990 XTX vs AMD Radeon RX 6800 XT

VS

AMD Radeon RX 7990 XTX

AMD Radeon RX 6800 XT

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7990 XTX 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 7990 XTX 's Advantages

Boost Clock has increased by 60% (3599MHz vs 2250MHz)

More VRAM (24GB vs 16GB)

Larger VRAM bandwidth (1152GB/s vs 512.0GB/s)

1536 additional rendering cores

AMD Radeon RX 6800 XT 's Advantages

Lower TDP (300W vs 405W)

Score

Benchmark

FP32 (float)

Radeon RX 7990 XTX +326%

88.45 TFLOPS

Radeon RX 6800 XT

20.74 TFLOPS

Radeon RX 7990 XTX

VS

Radeon RX 6800 XT

Graphics Card

Unknown

Release Date

Oct 2020

Navi III

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

2500 MHz

Base Clock

1825 MHz

3599 MHz

Boost Clock

2250 MHz

3000 MHz

Memory Clock

2000 MHz

Memory

24GB

Memory Size

16GB

GDDR6

Memory Type

GDDR6

384bit

Memory Bus

256bit

1152GB/s

Bandwidth

512.0GB/s

Render Config

96

Compute Units

72

-

6144

Shading Units

4608

384

TMUs

288

192

ROPs

128

-

96

RT Cores

72

256 KB per Array

L1 Cache

128 KB per Array

6 MB

L2 Cache

4 MB

192 MB

L3 Cache

128 MB

Theoretical Performance

691.0 GPixel/s

Pixel Rate

288.0 GPixel/s

1382 GTexel/s

Texture Rate

648.0 GTexel/s

176.9 TFLOPS

FP16 (half)

41.47 TFLOPS

88.45 TFLOPS

FP32 (float)

20.74 TFLOPS

2.764 TFLOPS

FP64 (double)

1296 GFLOPS

Board Design

405W

TDP

300W

800 W

Suggested PSU

700 W

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

Outputs

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

3x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Navi 31

GPU Name

Navi 21

Navi 31 XTX+

GPU Variant

Navi 21 XT (215-121000177)

RDNA 3.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

7 nm

57.7 billion

Transistors

26.8 billion

529 mm²

Die Size

520 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.2

OpenCL

2.1

1.3

Vulkan

1.3

-

6.7

Shader Model

6.5

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