AMD Radeon HD 7970 vs AMD Radeon RX 6800 XT

VS

AMD Radeon HD 7970

AMD Radeon RX 6800 XT

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 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 HD 7970 's Advantages

Lower TDP (250W vs 300W)

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

Score

Benchmark

FP32 (float)

Radeon HD 7970

3.789 TFLOPS

Radeon RX 6800 XT +447%

20.74 TFLOPS

3DMark Time Spy

Radeon HD 7970

2279

Radeon RX 6800 XT +753%

19441

Radeon HD 7970

VS

Radeon RX 6800 XT

Graphics Card

Dec 2011

Release Date

Oct 2020

Southern Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1825 MHz

-

Boost Clock

2250 MHz

1375 MHz

Memory Clock

2000 MHz

Memory

3GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

512.0GB/s

Render Config

32

Compute Units

72

-

2048

Shading Units

4608

128

TMUs

288

32

ROPs

128

-

RT Cores

72

16 KB (per CU)

L1 Cache

128 KB per Array

768 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

29.60 GPixel/s

Pixel Rate

288.0 GPixel/s

118.4 GTexel/s

Texture Rate

648.0 GTexel/s

-

FP16 (half)

41.47 TFLOPS

3.789 TFLOPS

FP32 (float)

20.74 TFLOPS

947.2 GFLOPS

FP64 (double)

1296 GFLOPS

Board Design

250W

TDP

300W

600 W

Suggested PSU

700 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Tahiti

GPU Name

Navi 21

Tahiti XT (215-0821060)

GPU Variant

Navi 21 XT (215-121000177)

GCN 1.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

4.313 billion

Transistors

26.8 billion

352 mm²

Die Size

520 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.3

-

5.1

Shader Model

6.5

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