GeForce GT 240 GDDR5 vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which comes with a clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon R9 M390X		125 Watts
	Difference: 55 Watts (79%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X is 194% quicker than the GeForce GT 240 GDDR5 overall, due to its higher data rate. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 105600 (194%)

Texel Rate

The Radeon R9 M390X should be much (about 426%) better at texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 74944 (426%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M390X is a better choice, by a large margin. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 18736 (426%)

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 data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.