GeForce 9800 GTX vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which uses a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this model. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce 9800 GTX		140 Watts
	Difference: 15 Watts (12%)

Memory Bandwidth

Theoretically, the Radeon R9 M395X should perform quite a bit faster than the GeForce 9800 GTX in general. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 89600 (127%)

Texel Rate

The Radeon R9 M395X will be a lot (more or less 114%) better at texture filtering than the GeForce 9800 GTX. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 49344 (114%)

Pixel Rate

The Radeon R9 M395X should be a lot (approximately 114%) better at FSAA than the GeForce 9800 GTX, and also will be capable of handling higher screen resolutions better. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 12336 (114%)

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 (in units of MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core 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 lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.