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GeForce 9800 GTX vs Radeon HD 4850 1GB

Intro

The GeForce 9800 GTX has a GPU core clock speed of 675 MHz, and the 512 MB of GDDR3 memory is set to run at 1100 MHz through a 256-bit bus. It also features 128 Stream Processors, 64 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 RAM is set to run at a frequency of 993 MHz on this model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 1GB 110 Watts
GeForce 9800 GTX 140 Watts
Difference: 30 Watts (27%)

Memory Bandwidth

As far as performance goes, the GeForce 9800 GTX should theoretically be a little bit better than the Radeon HD 4850 1GB overall. (explain)

GeForce 9800 GTX 70400 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 6848 (11%)

Texel Rate

The GeForce 9800 GTX should be a lot (about 73%) more effective at texture filtering than the Radeon HD 4850 1GB. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 18200 (73%)

Pixel Rate

The GeForce 9800 GTX will be just a bit (about 8%) more effective at anti-aliasing than the Radeon HD 4850 1GB, and able to handle higher resolutions without losing too much performance. (explain)

GeForce 9800 GTX 10800 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 800 (8%)

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 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 GTX Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year April 2008 Jun 25, 2008
Code Name G92 RV770 PRO
Memory 512 MB 1024 MB
Core Speed 675 MHz 625 MHz
Memory Speed 2200 MHz 1986 MHz
Power (Max TDP) 140 watts 110 watts
Bandwidth 70400 MB/sec 63552 MB/sec
Texel Rate 43200 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 10800 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 65 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 max amount of data (in units of MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GTX

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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