GeForce GT 240 GDDR5 1GB vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which comes with clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2560 SPUs as well as 160 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon R9 390 8G		275 Watts
	Difference: 205 Watts (293%)

Memory Bandwidth

In theory, the Radeon R9 390 8G should be 606% faster than the GeForce GT 240 GDDR5 1GB in general, because of its higher data rate. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 329600 (606%)

Texel Rate

The Radeon R9 390 8G will be much (more or less 809%) more effective at anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 142400 (809%)

Pixel Rate

The Radeon R9 390 8G is a lot (more or less 1355%) faster with regards to anti-aliasing than the GeForce GT 240 GDDR5 1GB, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.