Radeon HD 4870 512MB vs Radeon R7 360

Intro

Compare those specs to the Radeon R7 360, which makes use of a 28 nm design. AMD has clocked the core frequency at 1050 MHz. The GDDR5 RAM runs at a frequency of 1625 MHz on this card. It features 768 SPUs along with 48 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 360		100 Watts
Radeon HD 4870 512MB		150 Watts
	Difference: 50 Watts (50%)

Memory Bandwidth

In theory, the Radeon HD 4870 512MB should perform a bit faster than the Radeon R7 360 overall. (explain)

Radeon HD 4870 512MB		115200 MB/sec
Radeon R7 360		104000 MB/sec
	Difference: 11200 (11%)

Texel Rate

The Radeon R7 360 will be quite a bit (approximately 68%) more effective at AF than the Radeon HD 4870 512MB. (explain)

Radeon R7 360		50400 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 20400 (68%)

Pixel Rate

The Radeon R7 360 should be quite a bit (approximately 40%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 512MB, and should be able to handle higher resolutions while still performing well. (explain)

Radeon R7 360		16800 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 4800 (40%)

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 (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.