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Radeon HD 4670 1GB vs Radeon HD 4670 512MB

Intro

The Radeon HD 4670 1GB features a clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1100 MHz. It also makes use of a 128-bit bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Compare those specifications to the Radeon HD 4670 512MB, which features core clock speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM. It features 320(64x5) SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the Radeon HD 4670 1GB should perform a little bit faster than the Radeon HD 4670 512MB in general. (explain)

Radeon HD 4670 1GB 35200 MB/sec
Radeon HD 4670 512MB 32000 MB/sec
Difference: 3200 (10%)

Texel Rate

Both cards have exactly the same texel fill rate, so theoretically they should perform equally good at at anisotropic filtering. (explain)

Pixel Rate

Both cards have the exact same pixel rate, so theoretically they should be equally good at at FSAA, and be capable of handling the same resolutions. (explain)

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 1GB

Amazon.com

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Radeon HD 4670 512MB

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 1GB Radeon HD 4670 512MB
Manufacturer AMD AMD
Year Sep 10, 2008 Sep 10, 2008
Code Name RV730 XT RV730 XT
Memory 1024 MB 512 MB
Core Speed 750 MHz 750 MHz
Memory Speed 2200 MHz 2000 MHz
Power (Max TDP) 70 watts 70 watts
Bandwidth 35200 MB/sec 32000 MB/sec
Texel Rate 24000 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 6000 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 320(64x5) 320(64x5)
Texture Mapping Units 32 32
Render Output Units 8 8
Bus Type GDDR4/GDDR3/DDR3/DDR2 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 55 nm 55 nm
Transistors 514 million 514 million
Bus PCIe 2.0 x16, AGP 8x PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 4670 1GB

Amazon.com

Check prices at:

Radeon HD 4670 512MB

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.

Comments

One Response to “Radeon HD 4670 1GB vs Radeon HD 4670 512MB”
HUNG says:

with out doubt the wiiu gpu is based around the hd4670 level of gpu give or take

everything at vgleaks points to the 4670 or 5670 AMD gpu cores likely 4670 shrunk and optimized with 32mb edram embedded into the gpu logic

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