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GeForce 9800 GT 1GB vs Radeon HD 4850 2GB

Intro

The GeForce 9800 GT 1GB has a GPU core speed of 600 MHz, and the 1024 MB of GDDR3 memory runs at 900 MHz through a 256-bit bus. It also features 112 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Compare that to the Radeon HD 4850 2GB, which features a core clock speed of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB 105 Watts
Radeon HD 4850 2GB 110 Watts
Difference: 5 Watts (5%)

Memory Bandwidth

In theory, the Radeon HD 4850 2GB should be 10% quicker than the GeForce 9800 GT 1GB overall, due to its higher bandwidth. (explain)

Radeon HD 4850 2GB 63552 MB/sec
GeForce 9800 GT 1GB 57600 MB/sec
Difference: 5952 (10%)

Texel Rate

The GeForce 9800 GT 1GB is a lot (more or less 34%) more effective at AF than the Radeon HD 4850 2GB. (explain)

GeForce 9800 GT 1GB 33600 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 8600 (34%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4850 2GB is superior to the GeForce 9800 GT 1GB, though only just barely. (explain)

Radeon HD 4850 2GB 10000 Mpixels/sec
GeForce 9800 GT 1GB 9600 Mpixels/sec
Difference: 400 (4%)

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 9800 GT 1GB

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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 9800 GT 1GB Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year July 2008 Jun 25, 2008
Code Name G92a/b RV770 PRO
Memory 1024 MB 2048 MB
Core Speed 600 MHz 625 MHz
Memory Speed 1800 MHz 1986 MHz
Power (Max TDP) 105 watts 110 watts
Bandwidth 57600 MB/sec 63552 MB/sec
Texel Rate 33600 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 112 800(160x5)
Texture Mapping Units 56 40
Render Output Units 16 16
Bus Type GDDR3 GDDR4
Bus Width 256-bit 256-bit
Fab Process 65/55 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GT 1GB

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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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