GeForce GTX 275 vs Radeon HD 6790

Intro

The GeForce GTX 275 has clock speeds of 633 MHz on the GPU, and 1134 MHz on the 896 MB of GDDR3 RAM. It features 240 SPUs along with 80 TAUs and 28 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6790, which has a GPU core clock speed of 840 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 256-bit bus. It also features 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GTX 275 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 6790 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce GTX 275	Radeon HD 6790
Manufacturer	nVidia	ATi
Year	April 9, 2009	April 2011
Code Name	G200b	Barts LE
Fab Process	55 nm	40 nm
Bus	PCIe x16 2.0	PCIe 2.1 x16
Memory	896 MB	1024 MB
Core Speed	633 MHz	840 MHz
Shader Speed	1404 MHz	(N/A) MHz
Memory Speed	1134 MHz	1050 MHz
Unified Shaders	240	800
Texture Mapping Units	80	40
Render Output Units	28	16
Bus Type	GDDR3	GDDR5
Bus Width	448-bit	256-bit
DirectX Version	DirectX 10	DirectX 11
OpenGL Version	OpenGL 3.1	OpenGL 4.1
Power (Max TDP)	219 watts	150 watts
Shader Model	4.0	5.0
Bandwidth	127008 MB/sec	134400 MB/sec
Texel Rate	50640 Mtexels/sec	33600 Mtexels/sec
Pixel Rate	17724 Mpixels/sec	13440 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.