GeForce 8800 GTX vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which comes with GPU clock speed of 1050 MHz, and 8192 MB of GDDR5 RAM set to run at 1500 MHz through a 512-bit bus. It also is made up of 2816 Stream Processors, 176 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTX		155 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 120 Watts (77%)

Memory Bandwidth

The Radeon R9 390X 8G should in theory be quite a bit faster than the GeForce 8800 GTX overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 297600 (344%)

Texel Rate

The Radeon R9 390X 8G will be a lot (approximately 402%) more effective at anisotropic filtering than the GeForce 8800 GTX. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce 8800 GTX		36800 Mtexels/sec
	Difference: 148000 (402%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 390X 8G is the winner, by far. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 53400 (387%)

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 MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. 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, 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.