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GeForce 9800 GTX+ vs Radeon HD 4850 2GB

Intro

The GeForce 9800 GTX+ features a core clock speed of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare that to the Radeon HD 4850 2GB, which comes with a core clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

The GeForce 9800 GTX+ should in theory be just a bit faster than the Radeon HD 4850 2GB overall. (explain)

GeForce 9800 GTX+ 70400 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 6848 (11%)

Texel Rate

The GeForce 9800 GTX+ is a lot (approximately 89%) faster with regards to texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 22232 (89%)

Pixel Rate

The GeForce 9800 GTX+ is a small bit (approximately 18%) more effective at FSAA than the Radeon HD 4850 2GB, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
Radeon HD 4850 2GB 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 2GB

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 2GB
Manufacturer nVidia AMD
Year July 2008 Jun 25, 2008
Code Name G92b RV770 PRO
Memory 512 MB 2048 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: Bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are 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 better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 9800 GTX+

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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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