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GeForce GT 315 vs Radeon HD 3470 256MB

Intro

The GeForce GT 315 features a clock speed of 625 MHz and a DDR3 memory speed 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 all of that to the Radeon HD 3470 256MB, which has a core clock speed of 800 MHz and a DDR2 memory frequency of 950 MHz. It also features a 128-bit memory bus, and makes use of a 55 nm design. It is comprised of 40(8x5) SPUs, 4 Texture Address Units, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 3470 256MB should theoretically be just a bit better than the GeForce GT 315 in general. (explain)

Radeon HD 3470 256MB 30400 MB/sec
GeForce GT 315 25280 MB/sec
Difference: 5120 (20%)

Texel Rate

The GeForce GT 315 will be a lot (more or less 213%) better at texture filtering than the Radeon HD 3470 256MB. (explain)

GeForce GT 315 10000 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 6800 (213%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GT 315 is a better choice, by a large margin. (explain)

GeForce GT 315 5000 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 1800 (56%)

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 3470 256MB

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 3470 256MB
Manufacturer nVidia AMD
Year November 2009 2008
Code Name GT216 RV620 PRO
Memory 512 MB 256 MB
Core Speed 625 MHz 800 MHz
Memory Speed 1580 MHz 1900 MHz
Power (Max TDP) 52 watts (Unknown) watts
Bandwidth 25280 MB/sec 30400 MB/sec
Texel Rate 10000 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 48 40(8x5)
Texture Mapping Units 16 4
Render Output Units 8 4
Bus Type DDR3 DDR2
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 data (measured in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GT 315

Amazon.com

Check prices at:

Radeon HD 3470 256MB

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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