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GeForce GTX 285 1GB vs Radeon HD 4670 512MB

Intro

The GeForce GTX 285 1GB makes use of a 55 nm design. nVidia has set the core speed at 648 MHz. The GDDR3 memory runs at a speed of 1242 MHz on this particular model. It features 240 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory is set to run at a frequency of 1000 MHz on this specific model. It features 320(64x5) SPUs along with 32 TAUs and 8 ROPs.

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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

As far as performance goes, the GeForce GTX 285 1GB should in theory be quite a bit superior to 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 (more or less 116%) faster with regards to AF 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 using lots of anti-aliasing is important to you, then the GeForce GTX 285 1GB is superior to the Radeon HD 4670 512MB, by a large margin. (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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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