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GeForce 9800 GT 1GB vs Radeon HD 4850 512MB

Intro

The GeForce 9800 GT 1GB has a clock frequency of 600 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 256-bit bus, and makes use of a 65/55 nm design. It is comprised of 112 SPUs, 56 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 4850 512MB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 RAM runs at a speed 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)

GeForce 9800 GT 1GB 105 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 5 Watts (5%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 512MB should theoretically be a little bit superior to the GeForce 9800 GT 1GB overall. (explain)

Radeon HD 4850 512MB 63552 MB/sec
GeForce 9800 GT 1GB 57600 MB/sec
Difference: 5952 (10%)

Texel Rate

The GeForce 9800 GT 1GB will be a lot (more or less 34%) more effective at AF than the Radeon HD 4850 512MB. (explain)

GeForce 9800 GT 1GB 33600 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 8600 (34%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4850 512MB is superior to the GeForce 9800 GT 1GB, but only just. (explain)

Radeon HD 4850 512MB 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 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 GT 1GB Radeon HD 4850 512MB
Manufacturer nVidia AMD
Year July 2008 Jun 25, 2008
Code Name G92a/b RV770 PRO
Memory 1024 MB 512 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 GDDR3
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: Memory bandwidth is the max amount of data (counted in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 are processed in one 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the 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 the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory 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 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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