GeForce GT 240 GDDR5 1GB vs Radeon R9 270

Intro

Compare those specs to the Radeon R9 270, which makes use of a 28 nm design. AMD has clocked the core frequency at 900 MHz. The GDDR5 memory runs at a speed of 1400 MHz on this model. It features 1280 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon R9 270		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 should perform quite a bit faster than the GeForce GT 240 GDDR5 1GB in general. (explain)

Radeon R9 270		179200 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 124800 (229%)

Texel Rate

The Radeon R9 270 should be much (approximately 309%) more effective at texture filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 54400 (309%)

Pixel Rate

The Radeon R9 270 should be quite a bit (approximately 555%) more effective at anti-aliasing than the GeForce GT 240 GDDR5 1GB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 24400 (555%)

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 data (counted in MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour 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 bandwidth is, the lower the potential to reach the max fill rate.