Radeon HD 4850 512MB vs Radeon R7 250

Intro

Compare that to the Radeon R7 250, which features clock speeds of 1000 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 memory. It features 384 SPUs as well as 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 45 Watts (69%)

Memory Bandwidth

In theory, the Radeon R7 250 should be just a bit faster than the Radeon HD 4850 512MB in general. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 10048 (16%)

Texel Rate

The Radeon HD 4850 512MB should be a small bit (about 4%) better at AF than the Radeon R7 250. (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 1000 (4%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 512MB is the winner, and very much so. (explain)

Radeon HD 4850 512MB		10000 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 2000 (25%)

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 over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.