GeForce GT 310 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which features GPU core speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 310		31 Watts
Radeon R9 M390X		125 Watts
	Difference: 94 Watts (303%)

Memory Bandwidth

Performance-wise, the Radeon R9 M390X should in theory be a lot better than the GeForce GT 310 in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GT 310		16000 MB/sec
	Difference: 144000 (900%)

Texel Rate

The Radeon R9 M390X should be a lot (more or less 1864%) more effective at AF than the GeForce GT 310. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GT 310		4712 Mtexels/sec
	Difference: 87832 (1864%)

Pixel Rate

The Radeon R9 M390X should be a lot (about 882%) better at FSAA than the GeForce GT 310, and will be capable of handling higher screen resolutions better. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GT 310		2356 Mpixels/sec
	Difference: 20780 (882%)

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 max amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.