Radeon HD 4850 2GB vs Radeon R7 250

Intro

Compare all of that to the Radeon R7 250, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory is set to run at a speed of 1150 MHz on this particular model. It features 384 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 45 Watts (69%)

Memory Bandwidth

As far as performance goes, the Radeon R7 250 should in theory be a bit better than the Radeon HD 4850 2GB overall. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 10048 (16%)

Texel Rate

The Radeon HD 4850 2GB is just a bit (approximately 4%) faster with regards to anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 1000 (4%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4850 2GB is superior to the Radeon R7 250, by a large margin. (explain)

Radeon HD 4850 2GB		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 largest amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.