GeForce GTX 550 Ti vs Radeon HD 4650 1GB

Intro

Compare all that to the Radeon HD 4650 1GB, which uses a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR3 memory runs at a speed of 700 MHz on this card. It features 320(64x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 61 Watts (111%)

Memory Bandwidth

Performance-wise, the GeForce GTX 550 Ti should theoretically be a lot superior to the Radeon HD 4650 1GB in general. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 76096 (340%)

Texel Rate

The GeForce GTX 550 Ti will be quite a bit (more or less 50%) faster with regards to anisotropic filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 9600 (50%)

Pixel Rate

The GeForce GTX 550 Ti will be a lot (about 350%) better at anti-aliasing than the Radeon HD 4650 1GB, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 4650 1GB		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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number 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 applied 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 number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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.