GeForce 8800 GTX vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which uses a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this specific model. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce 8800 GTX		155 Watts
	Difference: 30 Watts (24%)

Memory Bandwidth

The Radeon R9 M390X should theoretically perform a lot faster than the GeForce 8800 GTX overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 73600 (85%)

Texel Rate

The Radeon R9 M390X is a lot (approximately 151%) more effective at anisotropic filtering than the GeForce 8800 GTX. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce 8800 GTX		36800 Mtexels/sec
	Difference: 55744 (151%)

Pixel Rate

The Radeon R9 M390X is a lot (approximately 68%) better at anti-aliasing than the GeForce 8800 GTX, and able to handle higher resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 9336 (68%)

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 past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.