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GeForce 9800 GTX+ vs Radeon HD 4850 1GB

Intro

The GeForce 9800 GTX+ features a clock frequency of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is comprised of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

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 speed of 993 MHz on this card. It features 800(160x5) SPUs as well as 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+ 145 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX+ should in theory be a 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+ is a lot (approximately 89%) better at anisotropic filtering than the Radeon HD 4850 1GB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 22232 (89%)

Pixel Rate

The GeForce 9800 GTX+ should be just a bit (more or less 18%) more effective at FSAA than the Radeon HD 4850 1GB, and able to handle higher resolutions while still performing well. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
Radeon HD 4850 1GB 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

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 July 2008 Jun 25, 2008
Code Name G92b RV770 PRO
Memory 512 MB 1024 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 GDDR4
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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability 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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