Home / GPU Comparison / AMD Radeon RX 7990 XTX or AMD Radeon HD 6790: What's better?

AMD Radeon RX 7990 XTX

vs

AMD Radeon HD 6790

GPU Comparison Result

Below are the results of a comparison of AMD Radeon RX 7990 XTX and AMD Radeon HD 6790 video cards based on key performance characteristics, as well as power consumption and much more.

Advantages

AMD Radeon RX 7990 XTX

Larger Memory Size: 24GB (24GB vs 1024MB)
Higher Bandwidth: 1152 GB/s (1152 GB/s vs 134.4 GB/s)
More Shading Units: 6144 (6144 vs 800)

Basic

AMD

Label Name

AMD

Launch Date

April 2011

Desktop

Platform

Desktop

Radeon RX 7990 XTX

Model Name

Radeon HD 6790

Navi III

Generation

Northern Islands

2500MHz

Base Clock

3599MHz

Boost Clock

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

57,700 million

Transistors

1,700 million

RT Cores

Compute Units

384

TMUs

Texture Mapping Units (TMUs) serve as components of the GPU, which are capable of rotating, scaling, and distorting binary images, and then placing them as textures onto any plane of a given 3D model. This process is called texture mapping.

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

RDNA 3.0

Architecture

TeraScale 2

Memory Specifications

24GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

The memory bus width refers to the number of bits of data that the video memory can transfer within a single clock cycle. The larger the bus width, the greater the amount of data that can be transmitted instantaneously, making it one of the crucial parameters of video memory. The memory bandwidth is calculated as: Memory Bandwidth = Memory Frequency x Memory Bus Width / 8. Therefore, when the memory frequencies are similar, the memory bus width will determine the size of the memory bandwidth.

256bit

3000MHz

Memory Clock

1050MHz

1152 GB/s

Bandwidth

Memory bandwidth refers to the data transfer rate between the graphics chip and the video memory. It is measured in bytes per second, and the formula to calculate it is: memory bandwidth = working frequency × memory bus width / 8 bits.

134.4 GB/s

Display and Media

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

Outputs

2x DVI
1x HDMI 1.3a
1x DisplayPort 1.1

Theoretical Performance

691.0 GPixel/s

Pixel Rate

Pixel fill rate refers to the number of pixels a graphics processing unit (GPU) can render per second, measured in MPixels/s (million pixels per second) or GPixels/s (billion pixels per second). It is the most commonly used metric to evaluate the pixel processing performance of a graphics card.

13.44 GPixel/s

1382 GTexel/s

Texture Rate

Texture fill rate refers to the number of texture map elements (texels) that a GPU can map to pixels in a single second.

33.60 GTexel/s

176.9 TFLOPS

FP16 (half)

An important metric for measuring GPU performance is floating-point computing capability. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable. Single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks, while double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy.

2.764 TFLOPS

FP64 (double)

An important metric for measuring GPU performance is floating-point computing capability. Double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy, while single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable.

90.219 TFLOPS

FP32 (float)

An important metric for measuring GPU performance is floating-point computing capability. Single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks, while double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable.

1.371 TFLOPS

Miscellaneous

6144

Shading Units

The most fundamental processing unit is the Streaming Processor (SP), where specific instructions and tasks are executed. GPUs perform parallel computing, which means multiple SPs work simultaneously to process tasks.

800

256 KB per Array

L1 Cache

8 KB (per CU)

6MB

L2 Cache

512KB

405W

TDP

150W

1.3

Vulkan Version

Vulkan is a cross-platform graphics and compute API by Khronos Group, offering high performance and low CPU overhead. It lets developers control the GPU directly, reduces rendering overhead, and supports multi-threading and multi-core processors.

2.2

OpenCL Version

1.2

4.6

OpenGL

4.4

12 Ultimate (12_2)

DirectX

11.2 (11_0)

3x 8-pin

Power Connectors

2x 6-pin

192

ROPs

The Raster Operations Pipeline (ROPs) is primarily responsible for handling lighting and reflection calculations in games, as well as managing effects like anti-aliasing (AA), high resolution, smoke, and fire. The more demanding the anti-aliasing and lighting effects in a game, the higher the performance requirements for the ROPs; otherwise, it may result in a sharp drop in frame rate.

6.7

Shader Model

5.0

800W

Suggested PSU

450W