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Radeon HD 4670 512MB vs Radeon R9 280X

Intro

The Radeon HD 4670 512MB uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM works at a speed of 1000 MHz on this specific model. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Compare those specs to the Radeon R9 280X, which has GPU clock speed of 850 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB 70 Watts
Radeon R9 280X 250 Watts
Difference: 180 Watts (257%)

Memory Bandwidth

In theory, the Radeon R9 280X will be 800% faster than the Radeon HD 4670 512MB overall, because of its greater data rate. (explain)

Radeon R9 280X 288000 MB/sec
Radeon HD 4670 512MB 32000 MB/sec
Difference: 256000 (800%)

Texel Rate

The Radeon R9 280X should be much (more or less 353%) faster with regards to texture filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon HD 4670 512MB 24000 Mtexels/sec
Difference: 84800 (353%)

Pixel Rate

The Radeon R9 280X is a lot (approximately 353%) more effective at AA than the Radeon HD 4670 512MB, and able to handle higher resolutions better. (explain)

Radeon R9 280X 27200 Mpixels/sec
Radeon HD 4670 512MB 6000 Mpixels/sec
Difference: 21200 (353%)

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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Radeon HD 4670 512MB

Amazon.com

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Radeon R9 280X

Amazon.com

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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 Radeon HD 4670 512MB Radeon R9 280X
Manufacturer AMD AMD
Year Sep 10, 2008 October 2013
Code Name RV730 XT Tahiti XTL
Memory 512 MB 3072 MB
Core Speed 750 MHz 850 MHz
Memory Speed 2000 MHz 6000 MHz
Power (Max TDP) 70 watts 250 watts
Bandwidth 32000 MB/sec 288000 MB/sec
Texel Rate 24000 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 6000 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 320(64x5) 2048
Texture Mapping Units 32 128
Render Output Units 8 32
Bus Type GDDR4/GDDR3/DDR3/DDR2 GDDR5
Bus Width 128-bit 384-bit
Fab Process 55 nm 28 nm
Transistors 514 million 4313 million
Bus PCIe 2.0 x16, AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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

Display Prices

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Radeon HD 4670 512MB

Amazon.com

Check prices at:

Radeon R9 280X

Amazon.com

Check prices at:

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.

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