GeForce 9800 GT 512MB vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which comes with a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
Radeon R9 M395X		125 Watts
	Difference: 20 Watts (19%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should theoretically be a lot better than the GeForce 9800 GT 512MB in general. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 102400 (178%)

Texel Rate

The Radeon R9 M395X will be quite a bit (approximately 175%) better at AF than the GeForce 9800 GT 512MB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 58944 (175%)

Pixel Rate

The Radeon R9 M395X should be much (more or less 141%) more effective at anti-aliasing than the GeForce 9800 GT 512MB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 13536 (141%)

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 information (measured in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.