Radeon HD 4870 X2 vs Radeon R7 370 4G

Intro

Compare those specifications to the Radeon R7 370 4G, which features GPU core speed of 975 MHz, and 4096 MB of GDDR5 memory running at 1400 MHz through a 256-bit bus. It also is made up of 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 4G		110 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 240 Watts (218%)

Memory Bandwidth

The Radeon HD 4870 X2, in theory, should perform much faster than the Radeon R7 370 4G in general. (explain)

Radeon HD 4870 X2		230400 MB/sec
Radeon R7 370 4G		179200 MB/sec
	Difference: 51200 (29%)

Texel Rate

The Radeon R7 370 4G is a small bit (about 4%) more effective at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon R7 370 4G		62400 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 2400 (4%)

Pixel Rate

The Radeon R7 370 4G is a lot (more or less 30%) more effective at anti-aliasing than the Radeon HD 4870 X2, and able to handle higher screen resolutions better. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 7200 (30%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.