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

Intro

Compare all that to the Radeon R9 390 8G, which has clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2560 SPUs as well as 160 TAUs and 64 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 390 8G		275 Watts
	Difference: 205 Watts (293%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G is 606% faster than the GeForce GT 240 GDDR5 1GB in general, due to its higher bandwidth. (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 should be much (approximately 809%) better at AF 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 will be much (more or less 1355%) faster with regards to AA than the GeForce GT 240 GDDR5 1GB, and also will be capable of handling higher resolutions while still performing well. (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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 are applied per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.