Radeon HD 4890 1GB vs Radeon R7 360

Intro

Compare that to the Radeon R7 360, which makes use of a 28 nm design. AMD has set the core frequency at 1050 MHz. The GDDR5 RAM works at a frequency of 1625 MHz on this particular card. It features 768 SPUs along with 48 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 360		100 Watts
Radeon HD 4890 1GB		190 Watts
	Difference: 90 Watts (90%)

Memory Bandwidth

The Radeon HD 4890 1GB should theoretically be a little bit faster than the Radeon R7 360 overall. (explain)

Radeon HD 4890 1GB		124800 MB/sec
Radeon R7 360		104000 MB/sec
	Difference: 20800 (20%)

Texel Rate

The Radeon R7 360 is much (approximately 26%) better at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon R7 360		50400 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 10400 (26%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R7 360 is the winner, but only just. (explain)

Radeon R7 360		16800 Mpixels/sec
Radeon HD 4890 1GB		16000 Mpixels/sec
	Difference: 800 (5%)

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 transported across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.