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GeForce GT 320 vs Radeon HD 3850 256MB

Intro

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

Compare that to the Radeon HD 3850 256MB, which features a clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 3850 256MB 75 Watts
Difference: 32 Watts (74%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3850 256MB should perform quite a bit faster than the GeForce GT 320 in general. (explain)

Radeon HD 3850 256MB 52992 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 27712 (110%)

Texel Rate

The GeForce GT 320 will be quite a bit (more or less 21%) more effective at anisotropic filtering than the Radeon HD 3850 256MB. (explain)

GeForce GT 320 12960 Mtexels/sec
Radeon HD 3850 256MB 10688 Mtexels/sec
Difference: 2272 (21%)

Pixel Rate

The Radeon HD 3850 256MB is much (more or less 147%) faster with regards to anti-aliasing than the GeForce GT 320, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 3850 256MB 10688 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 6368 (147%)

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 3850 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 3850 256MB
Manufacturer nVidia AMD
Year February 2010 Nov 19, 2007
Code Name GT215 RV670 PRO
Memory 1024 MB 256 MB
Core Speed 540 MHz 668 MHz
Memory Speed 1580 MHz 1656 MHz
Power (Max TDP) 43 watts 75 watts
Bandwidth 25280 MB/sec 52992 MB/sec
Texel Rate 12960 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 72 320(64x5)
Texture Mapping Units 24 16
Render Output Units 8 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 3850 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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