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AMD Radeon HD 6870

vs

AMD Radeon HD 8870 OEM

GPU Comparison Result

Below are the results of a comparison of AMD Radeon HD 6870 and AMD Radeon HD 8870 OEM video cards based on key performance characteristics, as well as power consumption and much more.

Advantages

AMD Radeon HD 8870 OEM

Larger Memory Size: 2GB (1024MB vs 2GB)
Higher Bandwidth: 153.6 GB/s (134.4 GB/s vs 153.6 GB/s)
More Shading Units: 1280 (1120 vs 1280)
Newer Launch Date: January 2013 (October 2010 vs January 2013)

Basic

AMD

Label Name

AMD

October 2010

Launch Date

January 2013

Desktop

Platform

Desktop

Radeon HD 6870

Model Name

Radeon HD 8870 OEM

Northern Islands

Generation

Sea Islands

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

1,700 million

Transistors

2,800 million

Compute Units

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

40 nm

Process Size

28 nm

TeraScale 2

Architecture

GCN 1.0

Memory Specifications

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

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

1050MHz

Memory Clock

1200MHz

134.4 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.

153.6 GB/s

Theoretical Performance

28.80 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.

32.00 GPixel/s

50.40 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.

80.00 GTexel/s

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.

160.0 GFLOPS

1.976 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.

2.509 TFLOPS

Miscellaneous

1120

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.

1280

8 KB (per CU)

L1 Cache

16 KB (per CU)

512KB

L2 Cache

512KB

151W

TDP

175W

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.

1.2

OpenCL Version

1.2

4.4

OpenGL

4.6

11.2 (11_0)

DirectX

12 (11_1)

2x 6-pin

Power Connectors

2x 6-pin

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.

5.0

Shader Model

5.1

450W

Suggested PSU

450W

Benchmarks

FP32 (float) / TFLOPS