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GeForce 8800 GT 1GB vs Radeon HD 4850 512MB

Intro

The GeForce 8800 GT 1GB uses a 65 nm design. nVidia has set the core speed at 600 MHz. The GDDR3 memory is set to run at a speed of 900 MHz on this specific model. It features 112 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4850 512MB, which comes with a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 memory running at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB 105 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 5 Watts (5%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 512MB will be 10% quicker than the GeForce 8800 GT 1GB in general, because of its greater data rate. (explain)

Radeon HD 4850 512MB 63552 MB/sec
GeForce 8800 GT 1GB 57600 MB/sec
Difference: 5952 (10%)

Texel Rate

The GeForce 8800 GT 1GB should be quite a bit (more or less 34%) faster with regards to texture filtering than the Radeon HD 4850 512MB. (explain)

GeForce 8800 GT 1GB 33600 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 8600 (34%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4850 512MB is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 4850 512MB 10000 Mpixels/sec
GeForce 8800 GT 1GB 9600 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 GT 1GB

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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 GT 1GB Radeon HD 4850 512MB
Manufacturer nVidia AMD
Year Dec 2007 Jun 25, 2008
Code Name G92 RV770 PRO
Memory 1024 MB 512 MB
Core Speed 600 MHz 625 MHz
Memory Speed 1800 MHz 1986 MHz
Power (Max TDP) 105 watts 110 watts
Bandwidth 57600 MB/sec 63552 MB/sec
Texel Rate 33600 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 112 800(160x5)
Texture Mapping Units 56 40
Render Output Units 16 16
Bus Type GDDR3 GDDR3
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: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GT 1GB

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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.

Comments

One Response to “GeForce 8800 GT 1GB vs Radeon HD 4850 512MB”
Florian says:

Thats imposible , i got 1 hd4850 512 mb 256 bit and i can play the famous game dishonored at 30-35 at very low / 1024/768 . Now i can play with this gt 8800 1gb 256 bits at very high at full rezolution with 35-40 . You are wrong guys

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