GeForce GT 240 GDDR5 vs Radeon R9 M380

Intro

Compare those specs to the Radeon R9 M380, which comes with clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M380 should be 76% faster than the GeForce GT 240 GDDR5 overall, because of its greater bandwidth. (explain)

Radeon R9 M380		96000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 41600 (76%)

Texel Rate

The Radeon R9 M380 is much (more or less 127%) more effective at AF than the GeForce GT 240 GDDR5. (explain)

Radeon R9 M380		40000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 22400 (127%)

Pixel Rate

The Radeon R9 M380 will be a lot (about 264%) faster with regards to AA than the GeForce GT 240 GDDR5, and also will be able to handle higher resolutions more effectively. (explain)

Radeon R9 M380		16000 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 11600 (264%)

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 max amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the 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 number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.