GeForce GT 240 GDDR5 vs Radeon HD 4750

Intro

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

Display Graphs

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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

The GeForce GT 240 GDDR5, in theory, should be a little 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 should be quite a bit (approximately 33%) more effective at AF 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 should be quite a bit (more or less 165%) more effective at FSAA than the GeForce GT 240 GDDR5, and also should be able to handle higher screen resolutions without losing too much performance. (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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.