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GeForce GTX 285 1GB vs Radeon HD 6850

Intro

The GeForce GTX 285 1GB has clock speeds of 648 MHz on the GPU, and 1242 MHz on the 1024 MB of GDDR3 RAM. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6850, which makes use of a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this specific card. It features 960 SPUs along with 48 TAUs and 32 ROPs.

(No game benchmarks for this combination yet.)

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 24% quicker than the Radeon HD 6850 in general, because of its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 285 1GB will be quite a bit (approximately 39%) faster with regards to 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

If running with a high screen resolution is important to you, then the Radeon HD 6850 is a better choice, not by a very large margin though. (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

Amazon.com

Radeon HD 6850

Amazon.com

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

Model GeForce GTX 285 1GB Radeon HD 6850
Manufacturer nVidia AMD
Year January 15, 2009 October 2010
Code Name G200b Barts Pro
Fab Process 55 nm 40 nm
Bus PCIe x16 2.0 PCIe x16
Memory 1024 MB 1024 MB
Core Speed 648 MHz 775 MHz
Shader Speed 1476 MHz (N/A) MHz
Memory Speed 1242 MHz (2484 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 240 960
Texture Mapping Units 80 48
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1
Power (Max TDP) 204 watts 127 watts
Shader Model 4.0 5.0
Bandwidth 158976 MB/sec 128000 MB/sec
Texel Rate 51840 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 24800 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs 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 output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce GTX 285 1GB vs Radeon HD 6850”
[...] 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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