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GeForce GTX 285 1GB vs Radeon HD 6850


Intro

The GeForce GTX 285 1GB features a core clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also uses a 512-bit memory bus, and makes use of a 55 nm design. It is made up of 240 SPUs, 80 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon HD 6850, which has GPU clock speed of 775 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is made up of 960 SPUs, 48 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 77 Watts (61%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB should be much faster than the Radeon HD 6850 overall. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 30976 (24%)

Texel Rate

The GeForce GTX 285 1GB should be quite a bit (about 39%) better at texture filtering than the Radeon HD 6850. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 14640 (39%)

Pixel Rate

The Radeon HD 6850 is a small bit (approximately 20%) better at FSAA than the GeForce GTX 285 1GB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 4064 (20%)

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

GeForce GTX 285 1GB

Radeon HD 6850

Specifications

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Model GeForce GTX 285 1GB Radeon HD 6850
Manufacturer nVidia AMD
Year January 15, 2009 October 2010
Code Name G200b Barts Pro
Memory 1024 MB 1024 MB
Core Speed 648 MHz 775 MHz
Memory Speed 2484 MHz 4000 MHz
Power (Max TDP) 204 watts 127 watts
Bandwidth 158976 MB/sec 128000 MB/sec
Texel Rate 51840 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 240 960
Texture Mapping Units 80 48
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 1700 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

GeForce GTX 285 1GB

Radeon HD 6850

Comments

One Response to “GeForce GTX 285 1GB vs Radeon HD 6850”
Duda Configuracion says:

[...] tinca mas la 285 ---------- Post added at 19:31 ---------- Previous post was at 19:27 ---------- GeForce GTX 285 1GB vs Radeon HD 6850 – Performance Comparison Benchmarks @ Hardware Compare ---------- Post added at 23:29 ---------- Previous post was at 19:31 ---------- Pucha ayudenme [...]

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