GeForce GTX 1070 vs Radeon HD 4870 X2

Intro

Compare all of that to the Radeon HD 4870 X2, which has GPU clock speed of 750 MHz, and 1024 MB of GDDR5 RAM running at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1070		150 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 200 Watts (133%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 1070 is 14% quicker than the Radeon HD 4870 X2 in general, due to its greater bandwidth. (explain)

GeForce GTX 1070		262144 MB/sec
Radeon HD 4870 X2		230400 MB/sec
	Difference: 31744 (14%)

Texel Rate

The GeForce GTX 1070 is a lot (more or less 201%) more effective at anisotropic filtering than the Radeon HD 4870 X2. (explain)

GeForce GTX 1070		180720 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 120720 (201%)

Pixel Rate

The GeForce GTX 1070 will be quite a bit (approximately 302%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 X2, and also able to handle higher resolutions while still performing well. (explain)

GeForce GTX 1070		96384 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 72384 (302%)

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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.