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GeForce GT 315 vs Radeon HD 3650

Intro

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

Compare all of that to the Radeon HD 3650, which has clock speeds of 725 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR4 memory. It features 120(24x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon HD 3650 should perform a bit faster than the GeForce GT 315 in general. (explain)

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

Texel Rate

The GeForce GT 315 will be quite a bit (about 72%) faster with regards to texture filtering than the Radeon HD 3650. (explain)

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

Pixel Rate

The GeForce GT 315 will be a lot (about 72%) better at full screen anti-aliasing than the Radeon HD 3650, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GT 315 5000 Mpixels/sec
Radeon HD 3650 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

Check prices at:

Radeon HD 3650

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
Manufacturer nVidia AMD
Year November 2009 2008
Code Name GT216 RV635 PRO
Memory 512 MB 1024 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 GDDR4
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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GT 315

Amazon.com

Check prices at:

Radeon HD 3650

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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