GeForce GTS 250 1GB vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory runs at a speed of 1150 MHz on this particular card. It features 384 SPUs along with 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 GTS 250 1GB		145 Watts
	Difference: 80 Watts (123%)

Memory Bandwidth

In theory, the Radeon R7 250 should perform a little bit faster than the GeForce GTS 250 1GB in general. (explain)

Radeon R7 250		73600 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTS 250 1GB is quite a bit (approximately 97%) better at anisotropic filtering than the Radeon R7 250. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 23232 (97%)

Pixel Rate

The GeForce GTS 250 1GB should be quite a bit (about 48%) more effective at anti-aliasing than the Radeon R7 250, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTS 250 1GB		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 (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. 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 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 applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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