GeForce 9800 GTX vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this specific model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce 9800 GTX		140 Watts
	Difference: 15 Watts (12%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be 127% quicker than the GeForce 9800 GTX overall, because of its greater data rate. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 89600 (127%)

Texel Rate

The Radeon R9 M390X is a lot (more or less 114%) faster with regards to AF than the GeForce 9800 GTX. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 49344 (114%)

Pixel Rate

The Radeon R9 M390X will be quite a bit (more or less 114%) better at FSAA than the GeForce 9800 GTX, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M390X		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 max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the 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 number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.