Radeon HD 4870 X2 vs Radeon RX 570

Intro

Compare all of that to the Radeon RX 570, which features a core clock frequency of 1168 MHz and a GDDR5 memory frequency of 1750 MHz. It also uses a 256-bit memory bus, and uses a 14 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 200 Watts (133%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 should be 0% quicker than the Radeon RX 570 in general, due to its higher data rate. (explain)

Radeon HD 4870 X2		230400 MB/sec
Radeon RX 570		229376 MB/sec
	Difference: 1024 (0%)

Texel Rate

The Radeon RX 570 is quite a bit (more or less 149%) better at AF than the Radeon HD 4870 X2. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 89504 (149%)

Pixel Rate

The Radeon RX 570 will be quite a bit (approximately 56%) better at full screen anti-aliasing than the Radeon HD 4870 X2, and should be capable of handling higher screen resolutions better. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 13376 (56%)

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 max amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.