GeForce GT 240 GDDR5 vs Radeon R9 Nano

Intro

Compare all of that to the Radeon R9 Nano, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The HBM memory runs at a speed of 500 MHz on this card. It features 4096 SPUs as well as 256 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon R9 Nano		175 Watts
	Difference: 105 Watts (150%)

Memory Bandwidth

The Radeon R9 Nano should in theory be a lot faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon R9 Nano		512000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 457600 (841%)

Texel Rate

The Radeon R9 Nano will be quite a bit (approximately 1355%) faster with regards to AF than the GeForce GT 240 GDDR5. (explain)

Radeon R9 Nano		256000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 238400 (1355%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 Nano is the winner, and very much so. (explain)

Radeon R9 Nano		64000 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 59600 (1355%)

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 largest amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's interface 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 card's 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 texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the 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 maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.