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GeForce GT 320 vs Radeon HD 4850 512MB

Intro

The GeForce GT 320 has a GPU core speed of 540 MHz, and the 1024 MB of GDDR3 RAM is set to run at 790 MHz through a 128-bit bus. It also features 72 Stream Processors, 24 TAUs, and 8 Raster Operation Units.

Compare that to the Radeon HD 4850 512MB, which comes with core speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 67 Watts (156%)

Memory Bandwidth

The Radeon HD 4850 512MB, in theory, should be much faster than the GeForce GT 320 in general. (explain)

Radeon HD 4850 512MB 63552 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 38272 (151%)

Texel Rate

The Radeon HD 4850 512MB should be quite a bit (approximately 93%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 4850 512MB 25000 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 12040 (93%)

Pixel Rate

The Radeon HD 4850 512MB will be a lot (more or less 131%) faster with regards to full screen anti-aliasing than the GeForce GT 320, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 4850 512MB 10000 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 5680 (131%)

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

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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 4850 512MB
Manufacturer nVidia AMD
Year February 2010 Jun 25, 2008
Code Name GT215 RV770 PRO
Memory 1024 MB 512 MB
Core Speed 540 MHz 625 MHz
Memory Speed 1580 MHz 1986 MHz
Power (Max TDP) 43 watts 110 watts
Bandwidth 25280 MB/sec 63552 MB/sec
Texel Rate 12960 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 72 800(160x5)
Texture Mapping Units 24 40
Render Output Units 8 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 727 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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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