GeForce GT 240 GDDR5 vs Radeon HD 4750

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the GeForce GT 240 GDDR5 should perform a small bit faster than the Radeon HD 4750 overall. (explain)

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

Texel Rate

The Radeon HD 4750 is quite a bit (more or less 33%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

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

Pixel Rate

The Radeon HD 4750 is a lot (approximately 165%) more effective at AA than the GeForce GT 240 GDDR5, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce GT 240 GDDR5		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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it must 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.