Geforce GTX 770 vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which features a clock speed of 730 MHz and a GDDR5 memory frequency of 800 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It features 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
Geforce GTX 770		230 Watts
	Difference: 155 Watts (207%)

Memory Bandwidth

Theoretically, the Geforce GTX 770 should be a lot faster than the Radeon HD 4750 in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 173184 (338%)

Texel Rate

The Geforce GTX 770 will be a lot (more or less 473%) faster with regards to anisotropic filtering than the Radeon HD 4750. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 110528 (473%)

Pixel Rate

The Geforce GTX 770 will be a lot (about 187%) more effective at AA than the Radeon HD 4750, and also should be able to handle higher resolutions more effectively. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 21792 (187%)

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.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.