Geforce GTX 690 vs Radeon HD 4870 X2

Intro

Compare those specs to the Radeon HD 4870 X2, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory works at a frequency of 900 MHz on this particular model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 690		300 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

Performance-wise, the Geforce GTX 690 should theoretically be a lot superior to the Radeon HD 4870 X2 in general. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 4870 X2		230400 MB/sec
	Difference: 154112 (67%)

Texel Rate

The Geforce GTX 690 will be much (about 290%) more effective at AF than the Radeon HD 4870 X2. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 174240 (290%)

Pixel Rate

The Geforce GTX 690 will be quite a bit (approximately 144%) faster with regards to anti-aliasing than the Radeon HD 4870 X2, and should be capable of handling higher screen resolutions better. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 34560 (144%)

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 largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.