GeForce 9800 GT 512MB vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which comes with clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
Radeon R9 M390X		125 Watts
	Difference: 20 Watts (19%)

Memory Bandwidth

In theory, the Radeon R9 M390X should perform a lot faster than the GeForce 9800 GT 512MB in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 102400 (178%)

Texel Rate

The Radeon R9 M390X will be quite a bit (approximately 175%) more effective at AF than the GeForce 9800 GT 512MB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 58944 (175%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M390X is the winner, and very much so. (explain)

Radeon R9 M390X		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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.