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GeForce 9800 GT 512MB vs Radeon HD 3850 1GB

Intro

The GeForce 9800 GT 512MB uses a 65/55 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM runs at a speed of 900 MHz on this particular model. It features 112 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 3850 1GB, which comes with clock speeds of 668 MHz on the GPU, and 828 MHz on the 1024 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 1GB 75 Watts
GeForce 9800 GT 512MB 105 Watts
Difference: 30 Watts (40%)

Memory Bandwidth

The GeForce 9800 GT 512MB should theoretically be a small bit faster than the Radeon HD 3850 1GB overall. (explain)

GeForce 9800 GT 512MB 57600 MB/sec
Radeon HD 3850 1GB 52992 MB/sec
Difference: 4608 (9%)

Texel Rate

The GeForce 9800 GT 512MB will be much (more or less 214%) better at AF than the Radeon HD 3850 1GB. (explain)

GeForce 9800 GT 512MB 33600 Mtexels/sec
Radeon HD 3850 1GB 10688 Mtexels/sec
Difference: 22912 (214%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 3850 1GB is superior to the GeForce 9800 GT 512MB, but not by far. (explain)

Radeon HD 3850 1GB 10688 Mpixels/sec
GeForce 9800 GT 512MB 9600 Mpixels/sec
Difference: 1088 (11%)

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 512MB

Amazon.com

Check prices at:

Radeon HD 3850 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 512MB Radeon HD 3850 1GB
Manufacturer nVidia AMD
Year July 2008 Nov 19, 2007
Code Name G92a/b RV670 PRO
Memory 512 MB 1024 MB
Core Speed 600 MHz 668 MHz
Memory Speed 1800 MHz 1656 MHz
Power (Max TDP) 105 watts 75 watts
Bandwidth 57600 MB/sec 52992 MB/sec
Texel Rate 33600 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 112 320(64x5)
Texture Mapping Units 56 16
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 (Unknown) million
Bus PCIe x16 2.0 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GT 512MB

Amazon.com

Check prices at:

Radeon HD 3850 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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