GeForce 9800 GT 512MB vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which features GPU clock speed of 1100 MHz, and 4096 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also features 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M385X will be 67% faster than the GeForce 9800 GT 512MB in general, because of its higher data rate. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 38400 (67%)

Texel Rate

The Radeon R9 M385X is much (approximately 83%) faster with regards to texture filtering than the GeForce 9800 GT 512MB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 28000 (83%)

Pixel Rate

The Radeon R9 M385X will be quite a bit (approximately 83%) better at full screen anti-aliasing than the GeForce 9800 GT 512MB, and should be able to handle higher screen resolutions better. (explain)

Radeon R9 M385X		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 largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.