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GeForce GTX 285 1GB vs Radeon HD 4670 512MB

Intro

The GeForce GTX 285 1GB features a clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also features a 512-bit bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 4670 512MB, which comes with GPU core speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory running at 1000 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB 70 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 134 Watts (191%)

Memory Bandwidth

The GeForce GTX 285 1GB, in theory, should be much faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 4670 512MB 32000 MB/sec
Difference: 126976 (397%)

Texel Rate

The GeForce GTX 285 1GB will be quite a bit (approximately 116%) better at anisotropic filtering than the Radeon HD 4670 512MB. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
Radeon HD 4670 512MB 24000 Mtexels/sec
Difference: 27840 (116%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 285 1GB is the winner, and very much so. (explain)

GeForce GTX 285 1GB 20736 Mpixels/sec
Radeon HD 4670 512MB 6000 Mpixels/sec
Difference: 14736 (246%)

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 GTX 285 1GB

Amazon.com

Radeon HD 4670 512MB

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

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Model GeForce GTX 285 1GB Radeon HD 4670 512MB
Manufacturer nVidia AMD
Year January 15, 2009 Sep 10, 2008
Code Name G200b RV730 XT
Memory 1024 MB 512 MB
Core Speed 648 MHz 750 MHz
Memory Speed 2484 MHz 2000 MHz
Power (Max TDP) 204 watts 70 watts
Bandwidth 158976 MB/sec 32000 MB/sec
Texel Rate 51840 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 240 320(64x5)
Texture Mapping Units 80 32
Render Output Units 32 8
Bus Type GDDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 512-bit 128-bit
Fab Process 55 nm 55 nm
Transistors 1400 million 514 million
Bus PCIe x16 2.0 PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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