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Radeon HD 4670 512MB vs Radeon HD 6450 (OEM)

Intro

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

Compare all that to the Radeon HD 6450 (OEM), which comes with core speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 160 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 4670 512MB 70 Watts
Difference: 39 Watts (126%)

Memory Bandwidth

The Radeon HD 4670 512MB should theoretically be much faster than the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 4670 512MB 32000 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 19200 (150%)

Texel Rate

The Radeon HD 4670 512MB should be a lot (approximately 380%) faster with regards to texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 4670 512MB 24000 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 19000 (380%)

Pixel Rate

The Radeon HD 4670 512MB will be much (approximately 140%) faster with regards to AA than the Radeon HD 6450 (OEM), and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 3500 (140%)

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

Check prices at:

Radeon HD 6450 (OEM)

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.

Specifications

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Model Radeon HD 4670 512MB Radeon HD 6450 (OEM)
Manufacturer AMD AMD
Year Sep 10, 2008 February 2011
Code Name RV730 XT Caicos
Memory 512 MB 512 MB
Core Speed 750 MHz 625 MHz
Memory Speed 2000 MHz 1600 MHz
Power (Max TDP) 70 watts 31 watts
Bandwidth 32000 MB/sec 12800 MB/sec
Texel Rate 24000 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 6000 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 320(64x5) 160
Texture Mapping Units 32 8
Render Output Units 8 4
Bus Type GDDR4/GDDR3/DDR3/DDR2 GDDR3
Bus Width 128-bit 64-bit
Fab Process 55 nm 40 nm
Transistors 514 million 370 million
Bus PCIe 2.0 x16, AGP 8x PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core 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 in one second.

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

Display Prices

Hide Prices

Radeon HD 4670 512MB

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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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