Radeon HD 7990 vs Radeon RX 460 2GB

Intro

Compare those specs to the Radeon RX 460 2GB, which has core clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

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Radeon HD 7990		513 Sol/s
Radeon RX 460 2GB		117 Sol/s
	Difference: 396 (338%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon HD 7990		375 Watts
	Difference: 300 Watts (400%)

Memory Bandwidth

The Radeon HD 7990 should theoretically perform much faster than the Radeon RX 460 2GB in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 464000 (414%)

Texel Rate

The Radeon HD 7990 will be much (about 298%) more effective at texture filtering than the Radeon RX 460 2GB. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 460 2GB		61040 Mtexels/sec
	Difference: 182160 (298%)

Pixel Rate

The Radeon HD 7990 will be a lot (about 249%) faster with regards to full screen anti-aliasing than the Radeon RX 460 2GB, and also should be able to handle higher resolutions better. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon RX 460 2GB		17440 Mpixels/sec
	Difference: 43360 (249%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

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Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.