GeForce GT 440 3GB vs Radeon HD 4750

Intro

Compare all that to the Radeon HD 4750, which uses a 40 nm design. AMD has clocked the core speed at 730 MHz. The GDDR5 memory is set to run at a speed of 800 MHz on this card. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
Radeon HD 4750		75 Watts
	Difference: 19 Watts (34%)

Memory Bandwidth

The Radeon HD 4750, in theory, should be a bit faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 8000 (19%)

Texel Rate

The Radeon HD 4750 should be quite a bit (approximately 64%) more effective at AF than the GeForce GT 440 3GB. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 9104 (64%)

Pixel Rate

The GeForce GT 440 3GB should be a lot (approximately 22%) faster with regards to full screen anti-aliasing than the Radeon HD 4750, and able to handle higher resolutions without slowing down too much. (explain)

GeForce GT 440 3GB		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 across the external memory interface in a second. It 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 DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.