GeForce GTX 465 vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this particular card. It features 2560 SPUs as well as 160 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
Radeon R9 390 8G		275 Watts
	Difference: 75 Watts (38%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390 8G should theoretically be quite a bit better than the GeForce GTX 465 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 281408 (274%)

Texel Rate

The Radeon R9 390 8G is quite a bit (about 499%) faster with regards to texture filtering than the GeForce GTX 465. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 133292 (499%)

Pixel Rate

The Radeon R9 390 8G will be much (more or less 229%) better at anti-aliasing than the GeForce GTX 465, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 44576 (229%)

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 information (in units of megabytes per second) that can be transported across 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 RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.