GeForce 9800 GT 512MB vs Radeon R9 M295X

Intro

Compare all that to the Radeon R9 M295X, which has a GPU core clock speed of 750 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also features 2048 SPUs, 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 M295X		125 Watts
	Difference: 20 Watts (19%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X should be much faster than the GeForce 9800 GT 512MB in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 118400 (206%)

Texel Rate

The Radeon R9 M295X is quite a bit (approximately 186%) better at texture filtering than the GeForce 9800 GT 512MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 62400 (186%)

Pixel Rate

The Radeon R9 M295X is a lot (about 150%) better at AA than the GeForce 9800 GT 512MB, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 14400 (150%)

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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it should 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 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 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 video card will be at handling 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 the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.