GeForce GTX 650 Ti vs Radeon HD 4770

Intro

Compare those specs to the Radeon HD 4770, which features core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 30 Watts (38%)

Memory Bandwidth

The GeForce GTX 650 Ti, in theory, should be quite a bit faster than the Radeon HD 4770 overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 35200 (69%)

Texel Rate

The GeForce GTX 650 Ti should be a lot (approximately 147%) faster with regards to AF than the Radeon HD 4770. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 35392 (147%)

Pixel Rate

The GeForce GTX 650 Ti is quite a bit (approximately 24%) more effective at anti-aliasing than the Radeon HD 4770, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 2848 (24%)

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once 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 AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.