Radeon HD 4550 512MB vs Radeon R7 250X 2GB

Intro

Compare all that to the Radeon R7 250X 2GB, which features GPU core speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 70 Watts (280%)

Memory Bandwidth

The Radeon R7 250X 2GB should theoretically be a lot faster than the Radeon HD 4550 512MB in general. (explain)

Radeon R7 250X 2GB		72000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon R7 250X 2GB should be much (about 733%) faster with regards to AF than the Radeon HD 4550 512MB. (explain)

Radeon R7 250X 2GB		40000 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 35200 (733%)

Pixel Rate

The Radeon R7 250X 2GB should be much (more or less 567%) more effective at anti-aliasing than the Radeon HD 4550 512MB, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 13600 (567%)

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 (in units of megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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