AMD Radeon HD 6990 vs AMD Radeon RX 7900 XTX

VS

AMD Radeon HD 6990

AMD Radeon RX 7900 XTX

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 24GB VRAM Radeon RX 7900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XTX 's Advantages

Released 11 years and 8 months late

Boost Clock2498MHz

More VRAM (24GB vs 2GB)

Larger VRAM bandwidth (960.0GB/s vs 160.0GB/s)

4608 additional rendering cores

Lower TDP (355W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990

2.55 TFLOPS

Radeon RX 7900 XTX +2307%

61.39 TFLOPS

Radeon HD 6990

VS

Radeon RX 7900 XTX

Graphics Card

Mar 2011

Release Date

Nov 2022

Northern Islands

Generation

Navi III

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1929 MHz

-

Boost Clock

2498 MHz

1250 MHz

Memory Clock

2500 MHz

Memory

2GB

Memory Size

24GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

384bit

160.0GB/s

Bandwidth

960.0GB/s

Render Config

24

Compute Units

96

-

1536

Shading Units

6144

96

TMUs

384

32

ROPs

192

-

RT Cores

96

8 KB (per CU)

L1 Cache

256 KB per Array

512 KB

L2 Cache

6 MB

-

L3 Cache

96 MB

Theoretical Performance

26.56 GPixel/s

Pixel Rate

479.6 GPixel/s

79.68 GTexel/s

Texture Rate

959.2 GTexel/s

-

FP16 (half)

122.8 TFLOPS

2.550 TFLOPS

FP32 (float)

61.39 TFLOPS

637.4 GFLOPS

FP64 (double)

1.918 TFLOPS

Board Design

375W

TDP

355W

750 W

Suggested PSU

750 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Antilles

GPU Name

Navi 31

Antilles XT (215-0807027)

GPU Variant

Navi 31 XTX (215-145000146)

TeraScale 3

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

5 nm

2.64 billion

Transistors

57.7 billion

389 mm²

Die Size

529 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.2

N/A

Vulkan

1.3

-

5.0

Shader Model

6.7

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