GeForce GT 240 GDDR5 1GB vs Radeon R9 M265X

Intro

Compare all of that to the Radeon R9 M265X, which has a clock speed of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M265X should theoretically be much faster than the GeForce GT 240 GDDR5 1GB overall. (explain)

Radeon R9 M265X		72000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 17600 (32%)

Texel Rate

The Radeon R9 M265X should be a lot (about 31%) better at texture filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 M265X		23000 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 5400 (31%)

Pixel Rate

The Radeon R9 M265X will be much (more or less 109%) more effective at full screen anti-aliasing than the GeForce GT 240 GDDR5 1GB, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M265X		9200 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 4800 (109%)

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 megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.