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GeForce GT 320 vs Radeon HD 3650 256MB

Intro

The GeForce GT 320 features a core clock frequency of 540 MHz and a GDDR3 memory speed of 790 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 72 SPUs, 24 TAUs, and 8 Raster Operation Units.

Compare those specifications to the Radeon HD 3650 256MB, which features core speeds of 725 MHz on the GPU, and 800 MHz on the 256 MB of DDR2 memory. It features 120(24x5) SPUs as well as 8 TAUs and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 3650 256MB 78 Watts
Difference: 35 Watts (81%)

Memory Bandwidth

As far as performance goes, the Radeon HD 3650 256MB should in theory be a little bit better than the GeForce GT 320 in general. (explain)

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

Texel Rate

The GeForce GT 320 is a lot (approximately 123%) better at anisotropic filtering than the Radeon HD 3650 256MB. (explain)

GeForce GT 320 12960 Mtexels/sec
Radeon HD 3650 256MB 5800 Mtexels/sec
Difference: 7160 (123%)

Pixel Rate

The GeForce GT 320 should be a lot (more or less 49%) better at full screen anti-aliasing than the Radeon HD 3650 256MB, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GT 320 4320 Mpixels/sec
Radeon HD 3650 256MB 2900 Mpixels/sec
Difference: 1420 (49%)

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 320

Amazon.com

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Radeon HD 3650 256MB

Amazon.com

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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 320 Radeon HD 3650 256MB
Manufacturer nVidia AMD
Year February 2010 2008
Code Name GT215 RV635 PRO
Memory 1024 MB 256 MB
Core Speed 540 MHz 725 MHz
Memory Speed 1580 MHz 1600 MHz
Power (Max TDP) 43 watts 78 watts
Bandwidth 25280 MB/sec 25600 MB/sec
Texel Rate 12960 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 72 120(24x5)
Texture Mapping Units 24 8
Render Output Units 8 4
Bus Type GDDR3 DDR2
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 727 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 amount of texture map elements (texels) that can be processed in one second. This figure 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 handling 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 graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GT 320

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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