AMD Radeon RX 6800 XT vs AMD Radeon HD 6790

VS

AMD Radeon RX 6800 XT

AMD Radeon HD 6790

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 1024MB VRAM Radeon HD 6790 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6800 XT 's Advantages

Released 9 years and 6 months late

Boost Clock2250MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (512.0GB/s vs 134.4GB/s)

3808 additional rendering cores

AMD Radeon HD 6790 's Advantages

Lower TDP (150W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 XT +1443%

20.74 TFLOPS

Radeon HD 6790

1.344 TFLOPS

Radeon RX 6800 XT

VS

Radeon HD 6790

Graphics Card

Oct 2020

Release Date

Apr 2011

Navi II

Generation

Northern Islands

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

1050 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

256bit

512.0GB/s

Bandwidth

134.4GB/s

Render Config

72

Compute Units

10

-

4608

Shading Units

800

288

TMUs

40

128

ROPs

16

-

72

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

4 MB

L2 Cache

512 KB

128 MB

L3 Cache

-

Theoretical Performance

288.0 GPixel/s

Pixel Rate

13.44 GPixel/s

648.0 GTexel/s

Texture Rate

33.60 GTexel/s

41.47 TFLOPS

FP16 (half)

-

20.74 TFLOPS

FP32 (float)

1344 GFLOPS

1296 GFLOPS

FP64 (double)

-

Board Design

300W

TDP

150W

700 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Navi 21

GPU Name

Barts

Navi 21 XT (215-121000177)

GPU Variant

Barts LE (215-0798002)

RDNA 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

26.8 billion

Transistors

1.7 billion

520 mm²

Die Size

255 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

1.3

Vulkan

N/A

-

6.5

Shader Model

5.0

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