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GeForce GT 315 vs Radeon HD 6790

Intro

The GeForce GT 315 comes with core speeds of 625 MHz on the GPU, and 790 MHz on the 512 MB of DDR3 RAM. It features 48 SPUs along with 16 TAUs and 8 ROPs.

Compare those specs to the Radeon HD 6790, which uses a 40 nm design. AMD has set the core frequency at 840 MHz. The GDDR5 memory runs at a frequency of 1050 MHz on this particular card. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315 52 Watts
Radeon HD 6790 150 Watts
Difference: 98 Watts (188%)

Memory Bandwidth

The Radeon HD 6790 should in theory perform a lot faster than the GeForce GT 315 overall. (explain)

Radeon HD 6790 134400 MB/sec
GeForce GT 315 25280 MB/sec
Difference: 109120 (432%)

Texel Rate

The Radeon HD 6790 will be much (about 236%) better at texture filtering than the GeForce GT 315. (explain)

Radeon HD 6790 33600 Mtexels/sec
GeForce GT 315 10000 Mtexels/sec
Difference: 23600 (236%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6790 is superior to the GeForce GT 315, by a large margin. (explain)

Radeon HD 6790 13440 Mpixels/sec
GeForce GT 315 5000 Mpixels/sec
Difference: 8440 (169%)

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 GT 315

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 GT 315 Radeon HD 6790
Manufacturer nVidia AMD
Year November 2009 April 2011
Code Name GT216 Barts LE
Memory 512 MB 1024 MB
Core Speed 625 MHz 840 MHz
Memory Speed 1580 MHz 4200 MHz
Power (Max TDP) 52 watts 150 watts
Bandwidth 25280 MB/sec 134400 MB/sec
Texel Rate 10000 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 48 800
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type DDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 486 million 1700 million
Bus PCIe 2.0 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 can be processed per second. This figure is worked out by multiplying the total number of texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GT 315

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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