Radeon HD 4870 1GB vs Radeon RX 460

Intro

Compare those specs to the Radeon RX 460, which features clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 1GB should be just a bit faster than the Radeon RX 460 overall. (explain)

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

Texel Rate

The Radeon RX 460 will be much (approximately 103%) more effective at anisotropic filtering than the Radeon HD 4870 1GB. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 460 is superior to the Radeon HD 4870 1GB, by far. (explain)

Radeon RX 460		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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.