GeForce GTX 260 Core 216 vs Radeon HD 6790

Intro

Compare all of that to the Radeon HD 6790, which features GPU core speed of 840 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 256-bit bus. It also features 800 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
GeForce GTX 260 Core 216		202 Watts
	Difference: 52 Watts (35%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6790 should in theory be a bit better than the GeForce GTX 260 Core 216 overall. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GTX 260 Core 216		111888 MB/sec
	Difference: 22512 (20%)

Texel Rate

The GeForce GTX 260 Core 216 will be a lot (about 23%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

GeForce GTX 260 Core 216		41472 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 7872 (23%)

Pixel Rate

The GeForce GTX 260 Core 216 is a small bit (approximately 20%) better at anti-aliasing than the Radeon HD 6790, and also should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 260 Core 216		16128 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 2688 (20%)

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 (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen 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 number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.