GeForce GTX 660 Ti vs Radeon HD 4750

Intro

Compare all of that to the Radeon HD 4750, which uses a 40 nm design. AMD has clocked the core frequency at 730 MHz. The GDDR5 RAM is set to run at a frequency of 800 MHz on this specific model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 Ti should in theory be a lot better than the Radeon HD 4750 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 92800 (181%)

Texel Rate

The GeForce GTX 660 Ti will be quite a bit (more or less 339%) faster with regards to AF than the Radeon HD 4750. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 79120 (339%)

Pixel Rate

The GeForce GTX 660 Ti is quite a bit (about 88%) better at AA than the Radeon HD 4750, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 10280 (88%)

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 largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its 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 card's 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.