GeForce GTX 650 Ti 2GB vs Radeon HD 4550 256MB

Intro

Compare that to the Radeon HD 4550 256MB, which comes with a core clock speed of 600 MHz and a DDR3 memory speed of 800 MHz. It also makes use of a 64-bit bus, and uses a 55 nm design. It features 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB		25 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 85 Watts (340%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti 2GB will be 575% faster than the Radeon HD 4550 256MB overall, because of its greater data rate. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 73600 (575%)

Texel Rate

The GeForce GTX 650 Ti 2GB should be quite a bit (about 1137%) more effective at anisotropic filtering than the Radeon HD 4550 256MB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 54592 (1137%)

Pixel Rate

The GeForce GTX 650 Ti 2GB should be much (more or less 519%) more effective at full screen anti-aliasing than the Radeon HD 4550 256MB, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 12448 (519%)

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 max amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.