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GeForce GTX 550 Ti vs Radeon HD 4850 512MB

Intro

The GeForce GTX 550 Ti features core clock speeds of 900 MHz on the GPU, and 1026 MHz on the 1024 MB of GDDR5 RAM. It features 192 SPUs as well as 32 Texture Address Units and 24 Rasterization Operator Units.

Compare those specs to the Radeon HD 4850 512MB, which features clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB 110 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 6 Watts (5%)

Memory Bandwidth

Performance-wise, the GeForce GTX 550 Ti should in theory be quite a bit better than the Radeon HD 4850 512MB in general. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 34944 (55%)

Texel Rate

The GeForce GTX 550 Ti is a small bit (more or less 15%) better at texture filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTX 550 Ti 28800 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 3800 (15%)

Pixel Rate

The GeForce GTX 550 Ti should be quite a bit (approximately 116%) more effective at anti-aliasing than the Radeon HD 4850 512MB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 4850 512MB 10000 Mpixels/sec
Difference: 11600 (116%)

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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GTX 550 Ti

Amazon.com

Other US-based stores

Radeon HD 4850 512MB

Amazon.com

Other US-based stores

Specifications

Model GeForce GTX 550 Ti Radeon HD 4850 512MB
Manufacturer nVidia ATi
Year March 2011 Jun 25, 2008
Code Name GF116 RV770 PRO
Fab Process 40 nm 55 nm
Bus PCIe 2.1 x16 PCIe 2.0 x16
Memory 1024 MB 512 MB
Core Speed 900 MHz 625 MHz
Shader Speed 1800 MHz (N/A) MHz
Memory Speed 1026 MHz (4104 MHz effective) 993 MHz (1986 MHz effective)
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 24 16
Bus Type GDDR5 GDDR3
Bus Width 192-bit 256-bit
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0
Power (Max TDP) 116 watts 110 watts
Shader Model 5.0 4.1
Bandwidth 98496 MB/sec 63552 MB/sec
Texel Rate 28800 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 10000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

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