Radeon HD 4870 1GB vs Radeon RX 460 2GB

Intro

Compare all of that to the Radeon RX 460 2GB, which uses a 14 nm design. AMD has clocked the core frequency at 1090 MHz. The GDDR5 memory works at a frequency of 1750 MHz on this card. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon HD 4870 1GB		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

The Radeon HD 4870 1GB should theoretically perform a little bit faster than the Radeon RX 460 2GB overall. (explain)

Radeon HD 4870 1GB		115200 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 3200 (3%)

Texel Rate

The Radeon RX 460 2GB is much (approximately 103%) better at AF than the Radeon HD 4870 1GB. (explain)

Radeon RX 460 2GB		61040 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 31040 (103%)

Pixel Rate

The Radeon RX 460 2GB is much (approximately 45%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 1GB, and capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon RX 460 2GB		17440 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 5440 (45%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.