GeForce GTX 560 Ti 448 vs Radeon HD 4870 X2

Intro

Compare all of that to the Radeon HD 4870 X2, which comes with a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 RAM set to run at 900 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti 448		210 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 140 Watts (67%)

Memory Bandwidth

In theory, the Radeon HD 4870 X2 should perform much faster than the GeForce GTX 560 Ti 448 in general. (explain)

Radeon HD 4870 X2		230400 MB/sec
GeForce GTX 560 Ti 448		144000 MB/sec
	Difference: 86400 (60%)

Texel Rate

The Radeon HD 4870 X2 will be a lot (about 46%) more effective at texture filtering than the GeForce GTX 560 Ti 448. (explain)

Radeon HD 4870 X2		60000 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 19008 (46%)

Pixel Rate

The GeForce GTX 560 Ti 448 should be a lot (about 22%) more effective at full screen anti-aliasing than the Radeon HD 4870 X2, and also should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 5280 (22%)

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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.