GeForce GT 440 3GB vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which features core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
Radeon R9 M390X		125 Watts
	Difference: 69 Watts (123%)

Memory Bandwidth

The Radeon R9 M390X, in theory, should perform quite a bit faster than the GeForce GT 440 3GB in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 116800 (270%)

Texel Rate

The Radeon R9 M390X should be a lot (approximately 549%) faster with regards to AF than the GeForce GT 440 3GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 78288 (549%)

Pixel Rate

The Radeon R9 M390X is quite a bit (about 62%) more effective at AA than the GeForce GT 440 3GB, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GT 440 3GB		14256 Mpixels/sec
	Difference: 8880 (62%)

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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 bandwidth is, the lower the potential to reach the max fill rate.