Geforce GTX 690 vs Radeon HD 4750

Intro

Compare all of that to the Radeon HD 4750, which comes with core clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
Geforce GTX 690		300 Watts
	Difference: 225 Watts (300%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 690 should in theory be a lot superior to the Radeon HD 4750 overall. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 333312 (651%)

Texel Rate

The Geforce GTX 690 will be a lot (more or less 903%) faster with regards to AF than the Radeon HD 4750. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 210880 (903%)

Pixel Rate

If running with high levels of AA is important to you, then the Geforce GTX 690 is superior to the Radeon HD 4750, and very much so. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 46880 (401%)

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 max amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.