GeForce GT 340 1GB vs Radeon R7 250

Intro

Compare all of that to the Radeon R7 250, which has a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1150 MHz through a 128-bit bus. It also is made up of 384 Stream Processors, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
GeForce GT 340 1GB		69 Watts
	Difference: 4 Watts (6%)

Memory Bandwidth

The Radeon R7 250 should theoretically perform a lot faster than the GeForce GT 340 1GB overall. (explain)

Radeon R7 250		73600 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 19200 (35%)

Texel Rate

The Radeon R7 250 is a lot (about 36%) more effective at texture filtering than the GeForce GT 340 1GB. (explain)

Radeon R7 250		24000 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 6400 (36%)

Pixel Rate

The Radeon R7 250 is quite a bit (about 82%) more effective at AA than the GeForce GT 340 1GB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R7 250		8000 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 3600 (82%)

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 largest amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number 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 video 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 can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of 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 output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.