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GeForce GT 315 vs Radeon HD 3650 256MB

Intro

The GeForce GT 315 features core clock speeds of 625 MHz on the GPU, and 790 MHz on the 512 MB of DDR3 memory. It features 48 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Compare that to the Radeon HD 3650 256MB, which has a clock speed of 725 MHz and a DDR2 memory frequency of 800 MHz. It also uses a 128-bit memory bus, and makes use of a 55 nm design. It is made up of 120(24x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315 52 Watts
Radeon HD 3650 256MB 78 Watts
Difference: 26 Watts (50%)

Memory Bandwidth

Performance-wise, the Radeon HD 3650 256MB should in theory be a little bit better than the GeForce GT 315 overall. (explain)

Radeon HD 3650 256MB 25600 MB/sec
GeForce GT 315 25280 MB/sec
Difference: 320 (1%)

Texel Rate

The GeForce GT 315 is quite a bit (about 72%) more effective at anisotropic filtering than the Radeon HD 3650 256MB. (explain)

GeForce GT 315 10000 Mtexels/sec
Radeon HD 3650 256MB 5800 Mtexels/sec
Difference: 4200 (72%)

Pixel Rate

The GeForce GT 315 should be a lot (more or less 72%) better at AA than the Radeon HD 3650 256MB, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GT 315 5000 Mpixels/sec
Radeon HD 3650 256MB 2900 Mpixels/sec
Difference: 2100 (72%)

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

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Radeon HD 3650 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 3650 256MB
Manufacturer nVidia AMD
Year November 2009 2008
Code Name GT216 RV635 PRO
Memory 512 MB 256 MB
Core Speed 625 MHz 725 MHz
Memory Speed 1580 MHz 1600 MHz
Power (Max TDP) 52 watts 78 watts
Bandwidth 25280 MB/sec 25600 MB/sec
Texel Rate 10000 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 48 120(24x5)
Texture Mapping Units 16 8
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/AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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

Display Prices

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GeForce GT 315

Amazon.com

Check prices at:

Radeon HD 3650 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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