Radeon HD 7790 vs Radeon R7 370 4G

Intro

Compare all that to the Radeon R7 370 4G, which uses a 28 nm design. AMD has clocked the core frequency at 975 MHz. The GDDR5 RAM works at a frequency of 1400 MHz on this specific card. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R7 370 4G		110 Watts
	Difference: 25 Watts (29%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 370 4G is 87% faster than the Radeon HD 7790 in general, due to its higher bandwidth. (explain)

Radeon R7 370 4G		179200 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 83200 (87%)

Texel Rate

The Radeon R7 370 4G is just a bit (approximately 11%) more effective at AF than the Radeon HD 7790. (explain)

Radeon R7 370 4G		62400 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 6400 (11%)

Pixel Rate

The Radeon R7 370 4G will be much (more or less 95%) better at anti-aliasing than the Radeon HD 7790, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 15200 (95%)

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 largest amount of information (counted in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 max fill rate.