AMD Radeon RX 7950 XT vs AMD Radeon HD 6990

VS

AMD Radeon RX 7950 XT

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7950 XT and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7950 XT 's Advantages

Boost Clock3000MHz

More VRAM (20GB vs 2GB)

Larger VRAM bandwidth (800.0GB/s vs 160.0GB/s)

3840 additional rendering cores

Lower TDP (300W vs 375W)

Score

Benchmark

FP32 (float)

Radeon RX 7950 XT +2429%

64.51 TFLOPS

Radeon HD 6990

2.55 TFLOPS

Radeon RX 7950 XT

VS

Radeon HD 6990

Graphics Card

Unknown

Release Date

Mar 2011

Navi III

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

2000 MHz

Base Clock

-

3000 MHz

Boost Clock

-

2500 MHz

Memory Clock

1250 MHz

Memory

20GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

320bit

Memory Bus

256bit

800.0GB/s

Bandwidth

160.0GB/s

Render Config

84

Compute Units

24

-

5376

Shading Units

1536

336

TMUs

96

192

ROPs

32

-

84

RT Cores

-

256 KB per Array

L1 Cache

8 KB (per CU)

6 MB

L2 Cache

512 KB

80 MB

L3 Cache

-

Theoretical Performance

576.0 GPixel/s

Pixel Rate

26.56 GPixel/s

1008 GTexel/s

Texture Rate

79.68 GTexel/s

129.0 TFLOPS

FP16 (half)

-

64.51 TFLOPS

FP32 (float)

2.550 TFLOPS

2.016 TFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

300W

TDP

375W

700 W

Suggested PSU

750 W

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

Outputs

1x DVI 4x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Navi 31

GPU Name

Antilles

Navi 31 XT+

GPU Variant

Antilles XT (215-0807027)

RDNA 3.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

57.7 billion

Transistors

2.64 billion

529 mm²

Die Size

389 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.2

OpenCL

1.2

1.3

Vulkan

N/A

-

6.7

Shader Model

5.0

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