GeForce 9800 GT 512MB vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which has GPU core 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 TAUs, and 32 Raster Operation Units.

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 in theory be quite a bit superior to 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 is much (more or less 175%) faster with regards to 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 will be a lot (about 141%) faster with regards to anti-aliasing than the GeForce 9800 GT 512MB, and will be capable of handling higher resolutions more effectively. (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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, 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 that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.