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GeForce 8800 Ultra vs Radeon HD 4870 1GB

Intro

The GeForce 8800 Ultra features core clock speeds of 612 MHz on the GPU, and 1080 MHz on the 768 MB of GDDR3 memory. It features 128 SPUs along with 64 Texture Address Units and 24 ROPs.

Compare those specs to the Radeon HD 4870 1GB, which comes with a core clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB 150 Watts
GeForce 8800 Ultra 171 Watts
Difference: 21 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 1GB will be 11% quicker than the GeForce 8800 Ultra overall, because of its higher bandwidth. (explain)

Radeon HD 4870 1GB 115200 MB/sec
GeForce 8800 Ultra 103680 MB/sec
Difference: 11520 (11%)

Texel Rate

The GeForce 8800 Ultra will be much (approximately 31%) better at AF than the Radeon HD 4870 1GB. (explain)

GeForce 8800 Ultra 39168 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 9168 (31%)

Pixel Rate

The GeForce 8800 Ultra will be quite a bit (approximately 22%) faster with regards to FSAA than the Radeon HD 4870 1GB, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce 8800 Ultra 14688 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 2688 (22%)

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 Ultra

Amazon.com

Check prices at:

Radeon HD 4870 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 8800 Ultra Radeon HD 4870 1GB
Manufacturer nVidia AMD
Year May 2007 Jun 25, 2008
Code Name G80 RV770 XT
Memory 768 MB 1024 MB
Core Speed 612 MHz 750 MHz
Memory Speed 2160 MHz 3600 MHz
Power (Max TDP) 171 watts 150 watts
Bandwidth 103680 MB/sec 115200 MB/sec
Texel Rate 39168 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 14688 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 128 800(160x5)
Texture Mapping Units 64 40
Render Output Units 24 16
Bus Type GDDR3 GDDR5
Bus Width 384-bit 256-bit
Fab Process 90 nm 55 nm
Transistors 681 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 Ultra

Amazon.com

Check prices at:

Radeon HD 4870 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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