AMD Radeon RX 6500 XT vs AMD Radeon HD 6990

VS

AMD Radeon RX 6500 XT

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6500 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 6500 XT 's Advantages

Released 10 years and 10 months late

Boost Clock2815MHz

More VRAM (4GB vs 2GB)

Lower TDP (107W vs 375W)

AMD Radeon HD 6990 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 143.9GB/s)

512 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6500 XT +126%

5.765 TFLOPS

Radeon HD 6990

2.55 TFLOPS

Radeon RX 6500 XT

VS

Radeon HD 6990

Graphics Card

Jan 2022

Release Date

Mar 2011

Navi II

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 4.0 x4

Bus Interface

PCIe 2.0 x16

Clock Speeds

2310 MHz

Base Clock

-

2815 MHz

Boost Clock

-

2248 MHz

Memory Clock

1250 MHz

Memory

4GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

64bit

Memory Bus

256bit

143.9GB/s

Bandwidth

160.0GB/s

Render Config

16

Compute Units

24

-

1024

Shading Units

1536

64

TMUs

96

32

ROPs

32

-

16

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

512 KB

16 MB

L3 Cache

-

Theoretical Performance

90.08 GPixel/s

Pixel Rate

26.56 GPixel/s

180.2 GTexel/s

Texture Rate

79.68 GTexel/s

11.53 TFLOPS

FP16 (half)

-

5.765 TFLOPS

FP32 (float)

2.550 TFLOPS

360.3 GFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

107W

TDP

375W

300 W

Suggested PSU

750 W

1x HDMI 2.1 1x DisplayPort 1.4a

Outputs

1x DVI 4x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Navi 24

GPU Name

Antilles

Navi 24 XT (215-135000006)

GPU Variant

Antilles XT (215-0807027)

RDNA 2.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

6 nm

Process Size

40 nm

5.4 billion

Transistors

2.64 billion

107 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

-

6.6

Shader Model

5.0

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