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GeForce GT 315 vs Radeon HD 3690/3830

Intro

The GeForce GT 315 features a GPU clock speed of 625 MHz, and the 512 MB of DDR3 RAM is set to run at 790 MHz through a 128-bit bus. It also is comprised of 48 Stream Processors, 16 Texture Address Units, and 8 ROPs.

Compare that to the Radeon HD 3690/3830, which features a GPU core clock speed of 668 MHz, and 256 MB of GDDR3 RAM running at 828 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 16 TAUs, and 16 ROPs.

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

As far as performance goes, the Radeon HD 3690/3830 should theoretically be a little bit better than the GeForce GT 315 overall. (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 (more or less 7%) more effective at anisotropic 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

The Radeon HD 3690/3830 should be much (more or less 114%) faster with regards to full screen anti-aliasing than the GeForce GT 315, and also capable of handling higher resolutions without losing too much performance. (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 (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum 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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