GeForce 8800 GT 1GB vs Radeon HD 7790

Intro

Compare those specifications to the Radeon HD 7790, which comes with a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce 8800 GT 1GB		105 Watts
	Difference: 20 Watts (24%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7790 should theoretically be quite a bit better than the GeForce 8800 GT 1GB overall. (explain)

Radeon HD 7790		96000 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 38400 (67%)

Texel Rate

The Radeon HD 7790 is quite a bit (more or less 67%) better at anisotropic filtering than the GeForce 8800 GT 1GB. (explain)

Radeon HD 7790		56000 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 22400 (67%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7790 is superior to the GeForce 8800 GT 1GB, and very much so. (explain)

Radeon HD 7790		16000 Mpixels/sec
GeForce 8800 GT 1GB		9600 Mpixels/sec
	Difference: 6400 (67%)

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 (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a 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 - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 potential to get to the max fill rate.