Radeon HD 4850 2GB vs Radeon R7 370 4G

Intro

Compare all of that to the Radeon R7 370 4G, which features GPU core speed of 975 MHz, and 4096 MB of GDDR5 RAM set to run at 1400 MHz through a 256-bit bus. It also is comprised of 1024 SPUs, 64 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the Radeon R7 370 4G should be 182% faster than the Radeon HD 4850 2GB in general, because of its greater data rate. (explain)

Radeon R7 370 4G		179200 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 115648 (182%)

Texel Rate

The Radeon R7 370 4G will be a lot (about 150%) better at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

Radeon R7 370 4G		62400 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 37400 (150%)

Pixel Rate

The Radeon R7 370 4G will be much (more or less 212%) more effective at full screen anti-aliasing than the Radeon HD 4850 2GB, and should be able to handle higher resolutions better. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 21200 (212%)

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 maximum amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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