GeForce 9800 GT 1GB vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which has core clock speeds of 1000 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 RAM. 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 9800 GT 1GB		105 Watts
	Difference: 40 Watts (62%)

Memory Bandwidth

The Radeon R7 250, in theory, should perform a lot faster than the GeForce 9800 GT 1GB overall. (explain)

Radeon R7 250		73600 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 16000 (28%)

Texel Rate

The GeForce 9800 GT 1GB should be a lot (approximately 40%) more effective at AF than the Radeon R7 250. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 9600 (40%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 9800 GT 1GB is a better choice, though only just barely. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 1600 (20%)

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 (counted in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.