GeForce GT 340 1GB vs Radeon HD 4750

Intro

Compare all of that to the Radeon HD 4750, which features a clock speed of 730 MHz and a GDDR5 memory speed of 800 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

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

As far as performance goes, the GeForce GT 340 1GB should in theory be a small bit better 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 is a lot (more or less 33%) more effective at 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

The Radeon HD 4750 is much (more or less 165%) better at anti-aliasing than the GeForce GT 340 1GB, and will be able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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