GeForce GT 340 1GB vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which comes with 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

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon R9 M390X		125 Watts
	Difference: 56 Watts (81%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should perform a lot faster than the GeForce GT 340 1GB in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 105600 (194%)

Texel Rate

The Radeon R9 M390X should be quite a bit (about 426%) better at AF than the GeForce GT 340 1GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 74944 (426%)

Pixel Rate

If running with high levels of AA 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 340 1GB		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 max amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR 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 worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.