GeForce GTS 250 512MB vs Radeon R7 250

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 80 Watts (123%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 should perform a little bit faster than the GeForce GTS 250 512MB overall. (explain)

Radeon R7 250		73600 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTS 250 512MB will be quite a bit (more or less 97%) more effective at texture filtering than the Radeon R7 250. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 23232 (97%)

Pixel Rate

The GeForce GTS 250 512MB should be quite a bit (about 48%) more effective at full screen anti-aliasing than the Radeon R7 250, and also able to handle higher resolutions while still performing well. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 3808 (48%)

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 data (in units of MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.