Radeon HD 4770 vs Radeon R7 370 4G

Intro

Compare those specifications to the Radeon R7 370 4G, which features clock speeds of 975 MHz on the GPU, and 1400 MHz on the 4096 MB of GDDR5 memory. It features 1024 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
Radeon R7 370 4G		110 Watts
	Difference: 30 Watts (38%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 370 4G should be 250% faster than the Radeon HD 4770 in general, because of its higher bandwidth. (explain)

Radeon R7 370 4G		179200 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 128000 (250%)

Texel Rate

The Radeon R7 370 4G will be quite a bit (more or less 160%) better at AF than the Radeon HD 4770. (explain)

Radeon R7 370 4G		62400 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 38400 (160%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R7 370 4G is superior to the Radeon HD 4770, by a large margin. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 19200 (160%)

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 data (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.