GeForce 9800 GT 512MB vs Radeon RX 550

Intro

Compare that to the Radeon RX 550, which has GPU core speed of 1100 MHz, and 2048 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also features 512 Stream Processors, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550		50 Watts
GeForce 9800 GT 512MB		105 Watts
	Difference: 55 Watts (110%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 550 should be 99% faster than the GeForce 9800 GT 512MB in general, due to its greater bandwidth. (explain)

Radeon RX 550		114688 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 57088 (99%)

Texel Rate

The Radeon RX 550 will be a bit (more or less 5%) better at texture filtering than the GeForce 9800 GT 512MB. (explain)

Radeon RX 550		35200 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 1600 (5%)

Pixel Rate

The Radeon RX 550 will be quite a bit (about 83%) more effective at FSAA than the GeForce 9800 GT 512MB, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 550		17600 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 8000 (83%)

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: Bandwidth is the max amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.