AMD Radeon RX 6400 vs AMD Radeon HD 6990

VS

AMD Radeon RX 6400

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 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 6400 's Advantages

Released 10 years and 10 months late

Boost Clock2321MHz

More VRAM (4GB vs 2GB)

Lower TDP (53W vs 375W)

AMD Radeon HD 6990 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 128.0GB/s)

768 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6400 +39%

3.565 TFLOPS

Radeon HD 6990

2.55 TFLOPS

Radeon RX 6400

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

1923 MHz

Base Clock

-

2321 MHz

Boost Clock

-

2000 MHz

Memory Clock

1250 MHz

Memory

4GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

64bit

Memory Bus

256bit

128.0GB/s

Bandwidth

160.0GB/s

Render Config

12

Compute Units

24

-

768

Shading Units

1536

48

TMUs

96

32

ROPs

32

-

12

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

512 KB

16 MB

L3 Cache

-

Theoretical Performance

74.27 GPixel/s

Pixel Rate

26.56 GPixel/s

111.4 GTexel/s

Texture Rate

79.68 GTexel/s

7.130 TFLOPS

FP16 (half)

-

3.565 TFLOPS

FP32 (float)

2.550 TFLOPS

222.8 GFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

53W

TDP

375W

250 W

Suggested PSU

750 W

1x HDMI 2.1 1x DisplayPort 1.4a

Outputs

1x DVI 4x mini-DisplayPort 1.2

None

Power Connectors

2x 8-pin

Graphics Processor

Navi 24

GPU Name

Antilles

Navi 24 XL (215-135000046)

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

-

6.7

Shader Model

5.0

Related GPU Comparisons

1

AMD Radeon RX 6400 vs AMD Radeon RX 580

2

AMD Radeon RX 6400 vs NVIDIA GeForce RTX 2060 12 GB

3

AMD Radeon RX 6400 vs AMD Radeon HD 7510 OEM

4

AMD Radeon RX 6400 vs AMD FirePro S9300 X2

5

AMD Radeon RX 6400 vs NVIDIA GeForce GT 640 OEM

6

AMD Radeon RX 6400 vs NVIDIA GeForce 8600 GTS

7

AMD Radeon RX 6400 vs NVIDIA GeForce GTX 950

8

AMD Radeon RX 6400 vs AMD Radeon HD 6930

9

AMD Radeon RX 6400 vs AMD Radeon RX 5700 XT

10

AMD Radeon RX 6400 vs NVIDIA P104 101

Related News

1

AMD's Thunderous Strike: Ryzen 9 9950X3D Performance Scores Revealed for the First Time!

2

Continuous Decline in DRAM Memory Prices: Downward Trend Intensifies

3

NVIDIA GB202 Chip Unveiled for the First Time, to be Used in RTX 5090 with 512-bit GDDR7 Memory

4

Strix Halo Integrated Graphics Score Appears on Passmark, Currently Slightly Below RTX 3060 12GB

5

AMD Unveils New RX 9070 XT Graphics Card Performance: Positioned Between RX 7900 GRE and RX 7900 XT

6

Double the Excitement! AMD FSR 4.0 to Launch Alongside RX 9070 XT Graphics Card

7

CPU-Z Minor Update: Support for Intel's Four New Products and New Memory

8

CXMT Reportedly Achieves 80% Yield in DDR5 Production

9

Intel Wildcat Lake Appears on Shipping List with FCBGA1516 Socket, Poised to Replace Alder Lake-N

10

The Commencement of ARM and Qualcomm Licensing Dispute Trial: Potential Major Impact on PC Market