GeForce GT 440 3GB vs Radeon HD 4650 1GB

Intro

Compare those specifications to the Radeon HD 4650 1GB, which makes use of a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR3 RAM runs at a frequency of 700 MHz on this particular 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 1GB		55 Watts
GeForce GT 440 3GB		56 Watts
	Difference: 1 Watts (2%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 440 3GB should be 93% faster than the Radeon HD 4650 1GB overall, because of its greater bandwidth. (explain)

GeForce GT 440 3GB		43200 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 20800 (93%)

Texel Rate

The Radeon HD 4650 1GB should be quite a bit (approximately 35%) faster with regards to anisotropic filtering than the GeForce GT 440 3GB. (explain)

Radeon HD 4650 1GB		19200 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 4944 (35%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GT 440 3GB is a better choice, and very much so. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 9456 (197%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 can be processed per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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