GeForce GTX 460 (OEM) vs Radeon HD 7790

Intro

Compare all of that to the Radeon HD 7790, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this card. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 65 Watts (76%)

Memory Bandwidth

The GeForce GTX 460 (OEM) should theoretically be a small bit faster than the Radeon HD 7790 in general. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 12800 (13%)

Texel Rate

The Radeon HD 7790 is quite a bit (about 54%) faster with regards to AF than the GeForce GTX 460 (OEM). (explain)

Radeon HD 7790		56000 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 19600 (54%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 460 (OEM) is superior to the Radeon HD 7790, and very much so. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 4800 (30%)

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 maximum amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of 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.