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GeForce GTS 150 vs Radeon HD 6870

Intro

The GeForce GTS 150 uses a 55 nm design. nVidia has set the core speed at 740 MHz. The GDDR3 RAM works at a frequency of 500 MHz on this particular model. It features 128 SPUs as well as 64 TAUs and 16 ROPs.

Compare all that to the Radeon HD 6870, which has GPU clock speed of 900 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 256-bit bus. It also is comprised of 1120 Stream Processors, 56 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150 141 Watts
Radeon HD 6870 151 Watts
Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically, the Radeon HD 6870 should be a lot faster than the GeForce GTS 150 overall. (explain)

Radeon HD 6870 134400 MB/sec
GeForce GTS 150 32000 MB/sec
Difference: 102400 (320%)

Texel Rate

The Radeon HD 6870 should be a bit (approximately 6%) better at anisotropic filtering than the GeForce GTS 150. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GTS 150 47360 Mtexels/sec
Difference: 3040 (6%)

Pixel Rate

The Radeon HD 6870 should be much (more or less 143%) faster with regards to AA than the GeForce GTS 150, and should be capable of handling higher resolutions better. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GTS 150 11840 Mpixels/sec
Difference: 16960 (143%)

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 6870

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 6870
Manufacturer nVidia AMD
Year March 10, 2009 October 2010
Code Name G92b Barts XT
Memory 1024 MB 1024 MB
Core Speed 740 MHz 900 MHz
Memory Speed 1000 MHz 4200 MHz
Power (Max TDP) 141 watts 151 watts
Bandwidth 32000 MB/sec 134400 MB/sec
Texel Rate 47360 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 11840 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 128 1120
Texture Mapping Units 64 56
Render Output Units 16 32
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 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video 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 that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTS 150

Amazon.com

Check prices at:

Radeon HD 6870

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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