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GeForce 8800 GTS (G92) vs Radeon HD 4850 2GB

Intro

The GeForce 8800 GTS (G92) features a core clock speed of 650 MHz and a GDDR3 memory speed of 970 MHz. It also uses a 256-bit memory bus, and makes use of a 65 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 ROPs.

Compare those specifications to the Radeon HD 4850 2GB, which makes use of a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR4 RAM is set to run at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
GeForce 8800 GTS (G92) 135 Watts
Difference: 25 Watts (23%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 2GB should in theory be a bit better than the GeForce 8800 GTS (G92) in general. (explain)

Radeon HD 4850 2GB 63552 MB/sec
GeForce 8800 GTS (G92) 62080 MB/sec
Difference: 1472 (2%)

Texel Rate

The GeForce 8800 GTS (G92) is a lot (about 66%) more effective at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

GeForce 8800 GTS (G92) 41600 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 16600 (66%)

Pixel Rate

The GeForce 8800 GTS (G92) is a bit (approximately 4%) more effective at FSAA than the Radeon HD 4850 2GB, and should be able to handle higher resolutions while still performing well. (explain)

GeForce 8800 GTS (G92) 10400 Mpixels/sec
Radeon HD 4850 2GB 10000 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 8800 GTS (G92)

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 8800 GTS (G92) Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year Dec 2007 Jun 25, 2008
Code Name G92 RV770 PRO
Memory 512 MB 2048 MB
Core Speed 650 MHz 625 MHz
Memory Speed 1940 MHz 1986 MHz
Power (Max TDP) 135 watts 110 watts
Bandwidth 62080 MB/sec 63552 MB/sec
Texel Rate 41600 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 10400 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 maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the 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 number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G92)

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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