GeForce GTX 550 Ti vs Radeon HD 4650 512MB

Intro

Compare those specifications to the Radeon HD 4650 512MB, which makes use of a 55 nm design. AMD has set the core speed at 600 MHz. The DDR2 RAM works at a frequency of 500 MHz on this specific card. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 61 Watts (111%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 550 Ti should perform much faster than the Radeon HD 4650 512MB in general. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 82496 (516%)

Texel Rate

The GeForce GTX 550 Ti will be a lot (about 50%) better at AF than the Radeon HD 4650 512MB. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 9600 (50%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 550 Ti is the winner, by far. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 16800 (350%)

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 largest amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.