GeForce GT 440 1.5GB vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which comes with clock speeds of 600 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 RAM. It features 320(64x5) SPUs as well as 32 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GT 440 1.5GB		56 Watts
	Difference: 1 Watts (2%)

Memory Bandwidth

The GeForce GT 440 1.5GB should theoretically be quite a bit faster than the Radeon HD 4650 512MB in general. (explain)

GeForce GT 440 1.5GB		43200 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 27200 (170%)

Texel Rate

The Radeon HD 4650 512MB is a lot (about 35%) more effective at texture filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4650 512MB		19200 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 4944 (35%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 440 1.5GB is a better choice, by far. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
Radeon HD 4650 512MB		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 (counted in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core clock 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core 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 is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.