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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 frequency of 1100 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It is comprised of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

Compare those specifications to the Radeon HD 4670 512MB, which has GPU clock speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory set to run at 1000 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 TAUs, and 8 Raster Operation 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 be 10% faster than the Radeon HD 4670 512MB in general, because of its higher data rate. (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 rate, so in theory 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 AA, 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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. The number is 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 it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

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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