AMD Radeon HD 7990 vs AMD Radeon RX 6750 XT

VS

AMD Radeon HD 7990

AMD Radeon RX 6750 XT

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 12GB VRAM Radeon RX 6750 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6750 XT 's Advantages

Released 8 years and 11 months late

Boost Clock has increased by 160% (2600MHz vs 1000MHz)

More VRAM (12GB vs 3GB)

Larger VRAM bandwidth (432.0GB/s vs 288.0GB/s)

512 additional rendering cores

Lower TDP (250W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990

4.096 TFLOPS

Radeon RX 6750 XT +224%

13.31 TFLOPS

Radeon HD 7990

VS

Radeon RX 6750 XT

Graphics Card

Apr 2013

Release Date

Mar 2022

Southern Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

950 MHz

Base Clock

2150 MHz

1000 MHz

Boost Clock

2600 MHz

1500 MHz

Memory Clock

2250 MHz

Memory

3GB

Memory Size

12GB

GDDR5

Memory Type

GDDR6

384bit

Memory Bus

192bit

288.0GB/s

Bandwidth

432.0GB/s

Render Config

32

Compute Units

40

-

2048

Shading Units

2560

128

TMUs

160

32

ROPs

64

-

RT Cores

40

16 KB (per CU)

L1 Cache

128 KB per Array

768 KB

L2 Cache

3 MB

-

L3 Cache

96 MB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

166.4 GPixel/s

128.0 GTexel/s

Texture Rate

416.0 GTexel/s

-

FP16 (half)

26.62 TFLOPS

4.096 TFLOPS

FP32 (float)

13.31 TFLOPS

1024 GFLOPS

FP64 (double)

832.0 GFLOPS

Board Design

375W

TDP

250W

750 W

Suggested PSU

600 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x HDMI 2.1 3x DisplayPort 1.4a

2x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Malta

GPU Name

Navi 22

Malta XT (215-0849026)

GPU Variant

Navi 22 KXT (215-127000144)

GCN 1.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

4.313 billion

Transistors

17.2 billion

365 mm²

Die Size

335 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.3

-

5.1

Shader Model

6.5

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