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GeForce GTX 285 1GB vs Radeon HD 6850

Intro

The GeForce GTX 285 1GB makes use of a 55 nm design. nVidia has clocked the core frequency at 648 MHz. The GDDR3 memory is set to run at a speed of 1242 MHz on this specific card. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 6850, which features core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs along with 48 Texture Address Units and 32 ROPs.

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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

Performance-wise, the GeForce GTX 285 1GB should theoretically be a lot better than the Radeon HD 6850 in general. (explain)

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

Texel Rate

The GeForce GTX 285 1GB is a lot (more or less 39%) better at AF 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 should be a small bit (approximately 20%) more effective at anti-aliasing than the GeForce GTX 285 1GB, and capable of handling 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

Display 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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video 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 maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability 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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