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GeForce 9800 GTX+ vs Radeon HD 4850 2GB

Intro

The GeForce 9800 GTX+ has a GPU core clock speed of 738 MHz, and the 512 MB of GDDR3 RAM is set to run at 1100 MHz through a 256-bit bus. It also is made up of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 4850 2GB, which features a GPU core clock speed of 625 MHz, and 2048 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

As far as performance goes, the GeForce 9800 GTX+ should in theory be a small bit superior to the Radeon HD 4850 2GB overall. (explain)

GeForce 9800 GTX+ 70400 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 6848 (11%)

Texel Rate

The GeForce 9800 GTX+ is a lot (approximately 89%) faster with regards to texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 22232 (89%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 9800 GTX+ is the winner, but only just. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 1808 (18%)

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 GTX+

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 GTX+ Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year July 2008 Jun 25, 2008
Code Name G92b RV770 PRO
Memory 512 MB 2048 MB
Core Speed 738 MHz 625 MHz
Memory Speed 2200 MHz 1986 MHz
Power (Max TDP) 145 watts 110 watts
Bandwidth 70400 MB/sec 63552 MB/sec
Texel Rate 47232 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 128 800(160x5)
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR3 GDDR4
Bus Width 256-bit 256-bit
Fab Process 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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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

Display Prices

Hide Prices

GeForce 9800 GTX+

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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