AMD Radeon RX 6900 XTX vs AMD Radeon HD 7950

VS

AMD Radeon RX 6900 XTX

AMD Radeon HD 7950

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 3GB VRAM Radeon HD 7950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6900 XTX 's Advantages

Boost Clock2435MHz

More VRAM (16GB vs 3GB)

Larger VRAM bandwidth (576.0GB/s vs 240.0GB/s)

3328 additional rendering cores

AMD Radeon HD 7950 's Advantages

Lower TDP (200W vs 330W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XTX +769%

24.93 TFLOPS

Radeon HD 7950

2.867 TFLOPS

Radeon RX 6900 XTX

VS

Radeon HD 7950

Graphics Card

Unknown

Release Date

Jan 2012

Navi II

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2075 MHz

Base Clock

-

2435 MHz

Boost Clock

-

2250 MHz

Memory Clock

1250 MHz

Memory

16GB

Memory Size

3GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

384bit

576.0GB/s

Bandwidth

240.0GB/s

Render Config

80

Compute Units

28

-

5120

Shading Units

1792

320

TMUs

112

128

ROPs

32

-

80

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

768 KB

128 MB

L3 Cache

-

Theoretical Performance

311.7 GPixel/s

Pixel Rate

25.60 GPixel/s

779.2 GTexel/s

Texture Rate

89.60 GTexel/s

49.87 TFLOPS

FP16 (half)

-

24.93 TFLOPS

FP32 (float)

2.867 TFLOPS

1.558 TFLOPS

FP64 (double)

716.8 GFLOPS

Board Design

330W

TDP

200W

700 W

Suggested PSU

550 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

2x 6-pin

Graphics Processor

Navi 21

GPU Name

Tahiti

Navi 21 XTXH (215-121000247)

GPU Variant

Tahiti PRO (215-0821056)

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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