GeForce GT 240 GDDR5 vs Radeon HD 5570

Intro

Compare all that to the Radeon HD 5570, which features a core clock frequency of 650 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is comprised of 400(80x5) SPUs, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
GeForce GT 240 GDDR5		70 Watts
	Difference: 27 Watts (63%)

Memory Bandwidth

As far as performance goes, the GeForce GT 240 GDDR5 should theoretically be quite a bit better than the Radeon HD 5570 overall. (explain)

GeForce GT 240 GDDR5		54400 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 25600 (89%)

Texel Rate

The GeForce GT 240 GDDR5 will be quite a bit (approximately 35%) more effective at texture filtering than the Radeon HD 5570. (explain)

GeForce GT 240 GDDR5		17600 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 4600 (35%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5570 is superior to the GeForce GT 240 GDDR5, but only just. (explain)

Radeon HD 5570		5200 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 800 (18%)

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 max amount of data (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher 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 amount of pixels the video card could possibly write 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 card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.