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GeForce GT 315 vs Radeon HD 3690/3830

Intro

The GeForce GT 315 has a core clock speed of 625 MHz and a DDR3 memory frequency of 790 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 48 SPUs, 16 TAUs, and 8 Raster Operation Units.

Compare all of that to the Radeon HD 3690/3830, which makes use of a 55 nm design. AMD has set the core speed at 668 MHz. The GDDR3 memory works at a speed of 828 MHz on this particular model. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

Display Graphs

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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

In theory, the Radeon HD 3690/3830 should perform a small bit faster than 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 is a bit (more or less 7%) more effective 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 lots of anti-aliasing is important to you, then the Radeon HD 3690/3830 is a better choice, 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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to 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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