GeForce GTX 465 vs Radeon HD 4790

Intro

Compare all that to the Radeon HD 4790, which has core clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 465 is 0% faster than the Radeon HD 4790 in general, because of its greater bandwidth. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 192 (0%)

Texel Rate

The GeForce GTX 465 will be quite a bit (approximately 39%) faster with regards to AF than the Radeon HD 4790. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 7508 (39%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 465 is a better choice, and very much so. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 9824 (102%)

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 information (in units of megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.