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GeForce 9800 GT 1GB vs Radeon HD 4850 1GB

Intro

The GeForce 9800 GT 1GB uses a 65/55 nm design. nVidia has clocked the core frequency at 600 MHz. The GDDR3 memory runs at a speed of 900 MHz on this particular card. It features 112 SPUs along with 56 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR4 RAM runs at a frequency of 993 MHz on this particular card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon HD 4850 1GB should be a small bit faster than the GeForce 9800 GT 1GB overall. (explain)

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

Texel Rate

The GeForce 9800 GT 1GB is much (approximately 34%) faster with regards to texture filtering than the Radeon HD 4850 1GB. (explain)

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

Pixel Rate

The Radeon HD 4850 1GB should be a bit (more or less 4%) faster with regards to full screen anti-aliasing than the GeForce 9800 GT 1GB, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 4850 1GB 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

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Radeon HD 4850 1GB

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 1GB
Manufacturer nVidia AMD
Year July 2008 Jun 25, 2008
Code Name G92a/b RV770 PRO
Memory 1024 MB 1024 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 within 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 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GT 1GB

Amazon.com

Check prices at:

Radeon HD 4850 1GB

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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