AMD Radeon HD 8990 OEM vs AMD Radeon RX 6400

VS

AMD Radeon HD 8990 OEM

AMD Radeon RX 6400

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 8990 OEM and 4GB VRAM Radeon RX 6400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8990 OEM 's Advantages

Larger VRAM bandwidth (288.0GB/s vs 128.0GB/s)

1280 additional rendering cores

AMD Radeon RX 6400 's Advantages

Released 8 years and 9 months late

Boost Clock has increased by 132% (2321MHz vs 1000MHz)

More VRAM (4GB vs 3GB)

Lower TDP (53W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 8990 OEM +14%

4.096 TFLOPS

Radeon RX 6400

3.565 TFLOPS

Radeon HD 8990 OEM

VS

Radeon RX 6400

Graphics Card

Apr 2013

Release Date

Jan 2022

Sea Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

950 MHz

Base Clock

1923 MHz

1000 MHz

Boost Clock

2321 MHz

1500 MHz

Memory Clock

2000 MHz

Memory

3GB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

384bit

Memory Bus

64bit

288.0GB/s

Bandwidth

128.0GB/s

Render Config

32

Compute Units

12

-

2048

Shading Units

768

128

TMUs

48

32

ROPs

32

-

RT Cores

12

16 KB (per CU)

L1 Cache

128 KB per Array

768 KB

L2 Cache

1024 KB

-

L3 Cache

16 MB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

74.27 GPixel/s

128.0 GTexel/s

Texture Rate

111.4 GTexel/s

-

FP16 (half)

7.130 TFLOPS

4.096 TFLOPS

FP32 (float)

3.565 TFLOPS

1024 GFLOPS

FP64 (double)

222.8 GFLOPS

Board Design

375W

TDP

53W

750 W

Suggested PSU

250 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x HDMI 2.1 1x DisplayPort 1.4a

2x 8-pin

Power Connectors

None

Graphics Processor

Malta

GPU Name

Navi 24

Malta XT (215-0849026)

GPU Variant

Navi 24 XL (215-135000046)

GCN 1.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

6 nm

4.313 billion

Transistors

5.4 billion

365 mm²

Die Size

107 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

2.2

1.2

Vulkan

1.3

-

5.1

Shader Model

6.7

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