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GeForce GT 320 vs Radeon HD 7850

Intro

The GeForce GT 320 has core clock speeds of 540 MHz on the GPU, and 790 MHz on the 1024 MB of GDDR3 RAM. It features 72 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7850, which uses a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 RAM runs at a frequency of 1200 MHz on this model. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 7850 130 Watts
Difference: 87 Watts (202%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7850 is 508% faster than the GeForce GT 320 in general, due to its higher data rate. (explain)

Radeon HD 7850 153600 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 128320 (508%)

Texel Rate

The Radeon HD 7850 is much (approximately 325%) faster with regards to texture filtering than the GeForce GT 320. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 42080 (325%)

Pixel Rate

The Radeon HD 7850 is a lot (more or less 537%) better at AA than the GeForce GT 320, and also should be able to handle higher screen resolutions better. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 23200 (537%)

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

Check prices at:

Radeon HD 7850

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 320 Radeon HD 7850
Manufacturer nVidia AMD
Year February 2010 March 2012
Code Name GT215 Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 540 MHz 860 MHz
Memory Speed 1580 MHz 4800 MHz
Power (Max TDP) 43 watts 130 watts
Bandwidth 25280 MB/sec 153600 MB/sec
Texel Rate 12960 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 72 1024
Texture Mapping Units 24 64
Render Output Units 8 32
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 727 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.3 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This 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 video card will be at handling 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 card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 7850

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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