GeForce GT 340 vs Radeon R7 250X 2GB

Intro

Compare that to the Radeon R7 250X 2GB, which has core speeds of 1000 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 26 Watts (38%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250X 2GB should be 32% faster than the GeForce GT 340 overall, due to its greater data rate. (explain)

Radeon R7 250X 2GB		72000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 17600 (32%)

Texel Rate

The Radeon R7 250X 2GB should be quite a bit (more or less 127%) faster with regards to anisotropic filtering than the GeForce GT 340. (explain)

Radeon R7 250X 2GB		40000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 22400 (127%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R7 250X 2GB is a better choice, and very much so. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 11600 (264%)

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 (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.