Radeon HD 4870 1GB vs Radeon R7 370 2G

Intro

Compare that to the Radeon R7 370 2G, which has GPU core speed of 975 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also features 1024 SPUs, 64 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 370 2G		110 Watts
Radeon HD 4870 1GB		150 Watts
	Difference: 40 Watts (36%)

Memory Bandwidth

As far as performance goes, the Radeon R7 370 2G should in theory be quite a bit better than the Radeon HD 4870 1GB overall. (explain)

Radeon R7 370 2G		179200 MB/sec
Radeon HD 4870 1GB		115200 MB/sec
	Difference: 64000 (56%)

Texel Rate

The Radeon R7 370 2G should be quite a bit (more or less 108%) better at texture filtering than the Radeon HD 4870 1GB. (explain)

Radeon R7 370 2G		62400 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 32400 (108%)

Pixel Rate

The Radeon R7 370 2G will be quite a bit (about 160%) faster with regards to FSAA than the Radeon HD 4870 1GB, and able to handle higher resolutions more effectively. (explain)

Radeon R7 370 2G		31200 Mpixels/sec
Radeon HD 4870 1GB		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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's 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 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 applied per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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 rate is also dependant 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 reach the maximum fill rate.