Radeon HD 5870 vs Radeon R7 370 2G

Intro

Compare that to the Radeon R7 370 2G, which comes with clock speeds of 975 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs along with 64 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 370 2G		110 Watts
Radeon HD 5870		188 Watts
	Difference: 78 Watts (71%)

Memory Bandwidth

Performance-wise, the Radeon R7 370 2G should in theory be a bit better than the Radeon HD 5870 overall. (explain)

Radeon R7 370 2G		179200 MB/sec
Radeon HD 5870		153600 MB/sec
	Difference: 25600 (17%)

Texel Rate

The Radeon HD 5870 will be a bit (about 9%) more effective at texture filtering than the Radeon R7 370 2G. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R7 370 2G		62400 Mtexels/sec
	Difference: 5600 (9%)

Pixel Rate

The Radeon R7 370 2G should be a small bit (more or less 15%) better at full screen anti-aliasing than the Radeon HD 5870, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R7 370 2G		31200 Mpixels/sec
Radeon HD 5870		27200 Mpixels/sec
	Difference: 4000 (15%)

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 max amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video 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 number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.