GeForce GT 240 GDDR5 1GB vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which makes use of a 40 nm design. AMD has clocked the core frequency at 730 MHz. The GDDR5 RAM works at a speed of 800 MHz on this model. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon HD 4750		75 Watts
	Difference: 5 Watts (7%)

Memory Bandwidth

Theoretically, the GeForce GT 240 GDDR5 1GB should perform a little bit faster than the Radeon HD 4750 in general. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4750 should be a lot (more or less 33%) better at anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 5760 (33%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4750 is the winner, by far. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce GT 240 GDDR5 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 data (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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