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GeForce 9800 GTX+ vs Radeon HD 4850 512MB

Intro

The GeForce 9800 GTX+ uses a 55 nm design. nVidia has set the core speed at 738 MHz. The GDDR3 memory is set to run at a speed of 1100 MHz on this model. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4850 512MB, which has a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 memory set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB 110 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

Theoretically, the GeForce 9800 GTX+ should perform a bit faster than the Radeon HD 4850 512MB overall. (explain)

GeForce 9800 GTX+ 70400 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 6848 (11%)

Texel Rate

The GeForce 9800 GTX+ will be much (about 89%) faster with regards to texture filtering than the Radeon HD 4850 512MB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 22232 (89%)

Pixel Rate

The GeForce 9800 GTX+ will be a bit (approximately 18%) better at AA than the Radeon HD 4850 512MB, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
Radeon HD 4850 512MB 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

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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 9800 GTX+ Radeon HD 4850 512MB
Manufacturer nVidia AMD
Year July 2008 Jun 25, 2008
Code Name G92b RV770 PRO
Memory 512 MB 512 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 GDDR3
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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core 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 a second.

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

Display Prices

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GeForce 9800 GTX+

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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