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GeForce GTS 150 vs Radeon HD 6790

Intro

The GeForce GTS 150 features a GPU core clock speed of 740 MHz, and the 1024 MB of GDDR3 RAM is set to run at 500 MHz through a 256-bit bus. It also is made up of 128 Stream Processors, 64 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon HD 6790, which makes use of a 40 nm design. AMD has set the core speed at 840 MHz. The GDDR5 RAM works at a speed of 1050 MHz on this particular card. It features 800 SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150 141 Watts
Radeon HD 6790 150 Watts
Difference: 9 Watts (6%)

Memory Bandwidth

The Radeon HD 6790, in theory, should be much faster than the GeForce GTS 150 in general. (explain)

Radeon HD 6790 134400 MB/sec
GeForce GTS 150 32000 MB/sec
Difference: 102400 (320%)

Texel Rate

The GeForce GTS 150 will be a lot (approximately 41%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

GeForce GTS 150 47360 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 13760 (41%)

Pixel Rate

The Radeon HD 6790 is a bit (more or less 14%) faster with regards to AA than the GeForce GTS 150, and able to handle higher resolutions better. (explain)

Radeon HD 6790 13440 Mpixels/sec
GeForce GTS 150 11840 Mpixels/sec
Difference: 1600 (14%)

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

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GeForce GTS 150

Amazon.com

Check prices at:

Radeon HD 6790

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTS 150 Radeon HD 6790
Manufacturer nVidia AMD
Year March 10, 2009 April 2011
Code Name G92b Barts LE
Memory 1024 MB 1024 MB
Core Speed 740 MHz 840 MHz
Memory Speed 1000 MHz 4200 MHz
Power (Max TDP) 141 watts 150 watts
Bandwidth 32000 MB/sec 134400 MB/sec
Texel Rate 47360 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 11840 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 128 800
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 754 million 1700 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses 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 are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTS 150

Amazon.com

Check prices at:

Radeon HD 6790

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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