GeForce GT 440 1.5GB vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which has core speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 4750		75 Watts
	Difference: 19 Watts (34%)

Memory Bandwidth

In theory, the Radeon HD 4750 should be 19% faster than the GeForce GT 440 1.5GB in general, because of its greater data rate. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 8000 (19%)

Texel Rate

The Radeon HD 4750 is much (more or less 64%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 9104 (64%)

Pixel Rate

The GeForce GT 440 1.5GB will be a lot (about 22%) better at anti-aliasing than the Radeon HD 4750, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 2576 (22%)

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 MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, 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 card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few 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.