AMD Radeon RX 6800 XT vs AMD Radeon HD 7970

VS

AMD Radeon RX 6800 XT

AMD Radeon HD 7970

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 3GB VRAM Radeon HD 7970 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 8 years and 10 months late

Boost Clock2250MHz

More VRAM (16GB vs 3GB)

Larger VRAM bandwidth (512.0GB/s vs 264.0GB/s)

2560 additional rendering cores

AMD Radeon HD 7970 's Advantages

Lower TDP (250W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 XT +447%

20.74 TFLOPS

Radeon HD 7970

3.789 TFLOPS

3DMark Time Spy

Radeon RX 6800 XT +753%

19441

Radeon HD 7970

2279

Radeon RX 6800 XT

VS

Radeon HD 7970

Graphics Card

Oct 2020

Release Date

Dec 2011

Navi II

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1825 MHz

Base Clock

-

2250 MHz

Boost Clock

-

2000 MHz

Memory Clock

1375 MHz

Memory

16GB

Memory Size

3GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

384bit

512.0GB/s

Bandwidth

264.0GB/s

Render Config

72

Compute Units

32

-

4608

Shading Units

2048

288

TMUs

128

ROPs

32

-

72

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

768 KB

128 MB

L3 Cache

-

Theoretical Performance

288.0 GPixel/s

Pixel Rate

29.60 GPixel/s

648.0 GTexel/s

Texture Rate

118.4 GTexel/s

41.47 TFLOPS

FP16 (half)

-

20.74 TFLOPS

FP32 (float)

3.789 TFLOPS

1296 GFLOPS

FP64 (double)

947.2 GFLOPS

Board Design

300W

TDP

250W

700 W

Suggested PSU

600 W

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

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Navi 21

GPU Name

Tahiti

Navi 21 XT (215-121000177)

GPU Variant

Tahiti XT (215-0821060)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

4.313 billion

520 mm²

Die Size

352 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

1.3

Vulkan

1.2

-

6.5

Shader Model

5.1

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