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GeForce GT 315 vs Radeon HD 3690/3830

Intro

The GeForce GT 315 comes with a clock speed of 625 MHz and a DDR3 memory frequency of 790 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is made up of 48 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare that to the Radeon HD 3690/3830, which comes with GPU core speed of 668 MHz, and 256 MB of GDDR3 RAM set to run at 828 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315 52 Watts
Radeon HD 3690/3830 75 Watts
Difference: 23 Watts (44%)

Memory Bandwidth

Performance-wise, the Radeon HD 3690/3830 should theoretically be a little bit superior to the GeForce GT 315 in general. (explain)

Radeon HD 3690/3830 26496 MB/sec
GeForce GT 315 25280 MB/sec
Difference: 1216 (5%)

Texel Rate

The Radeon HD 3690/3830 will be a little bit (about 7%) better at texture filtering than the GeForce GT 315. (explain)

Radeon HD 3690/3830 10688 Mtexels/sec
GeForce GT 315 10000 Mtexels/sec
Difference: 688 (7%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3690/3830 is the winner, by far. (explain)

Radeon HD 3690/3830 10688 Mpixels/sec
GeForce GT 315 5000 Mpixels/sec
Difference: 5688 (114%)

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 3690/3830

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 3690/3830
Manufacturer nVidia AMD
Year November 2009 2008
Code Name GT216 RV670 PRO
Memory 512 MB 256 MB
Core Speed 625 MHz 668 MHz
Memory Speed 1580 MHz 1656 MHz
Power (Max TDP) 52 watts 75 watts
Bandwidth 25280 MB/sec 26496 MB/sec
Texel Rate 10000 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 48 320(64x5)
Texture Mapping Units 16 16
Render Output Units 8 16
Bus Type DDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 486 million (Unknown) million
Bus PCIe 2.0 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's interface 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 higher the memory bandwidth, 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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.

Display Prices

Hide Prices

GeForce GT 315

Amazon.com

Check prices at:

Radeon HD 3690/3830

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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