GeForce GTX 275 vs Radeon R7 240

Intro

Compare that to the Radeon R7 240, which has GPU core speed of 730 MHz, and 2048 MB of DDR3 RAM running at 900 MHz through a 128-bit bus. It also features 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce GTX 275		219 Watts
	Difference: 189 Watts (630%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 275 should in theory be much superior to the Radeon R7 240 overall. (explain)

GeForce GTX 275		127008 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 98208 (341%)

Texel Rate

The GeForce GTX 275 will be a lot (about 247%) faster with regards to texture filtering than the Radeon R7 240. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 36040 (247%)

Pixel Rate

The GeForce GTX 275 is a lot (about 203%) faster with regards to full screen anti-aliasing than the Radeon R7 240, and also able to handle higher resolutions while still performing well. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 11884 (203%)

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 information (measured in MB per second) that can be transported across the external memory interface within a second. The number is calculated 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 it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 can be applied per second. This figure is calculated 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.