GeForce GT 340 1GB vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which uses a 40 nm design. AMD has clocked the core speed at 730 MHz. The GDDR5 RAM is set to run at a speed of 800 MHz on this specific model. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 4750		75 Watts
	Difference: 6 Watts (9%)

Memory Bandwidth

The GeForce GT 340 1GB should in theory perform a little bit faster than the Radeon HD 4750 overall. (explain)

GeForce GT 340 1GB		54400 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4750 will be quite a bit (more or less 33%) faster with regards to texture filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 5760 (33%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4750 is the winner, and very much so. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 7280 (165%)

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 maximum amount of information (measured in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.