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Radeon HD 4670 1GB vs Radeon HD 6450 (OEM) 1GB

Intro

The Radeon HD 4670 1GB features a core clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1100 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Compare all that to the Radeon HD 6450 (OEM) 1GB, which comes with core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 160 SPUs as well as 8 TAUs and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
Radeon HD 4670 1GB 70 Watts
Difference: 39 Watts (126%)

Memory Bandwidth

The Radeon HD 4670 1GB should in theory perform quite a bit faster than the Radeon HD 6450 (OEM) 1GB in general. (explain)

Radeon HD 4670 1GB 35200 MB/sec
Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Difference: 6400 (22%)

Texel Rate

The Radeon HD 4670 1GB will be quite a bit (about 300%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 4670 1GB 24000 Mtexels/sec
Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Difference: 18000 (300%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4670 1GB is the winner, by far. (explain)

Radeon HD 4670 1GB 6000 Mpixels/sec
Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Difference: 3000 (100%)

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

Check prices at:

Radeon HD 6450 (OEM) 1GB

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 1GB Radeon HD 6450 (OEM) 1GB
Manufacturer AMD AMD
Year Sep 10, 2008 February 2011
Code Name RV730 XT Caicos
Memory 1024 MB 1024 MB
Core Speed 750 MHz 750 MHz
Memory Speed 2200 MHz 3600 MHz
Power (Max TDP) 70 watts 31 watts
Bandwidth 35200 MB/sec 28800 MB/sec
Texel Rate 24000 Mtexels/sec 6000 Mtexels/sec
Pixel Rate 6000 Mpixels/sec 3000 Mpixels/sec
Unified Shaders 320(64x5) 160
Texture Mapping Units 32 8
Render Output Units 8 4
Bus Type GDDR4/GDDR3/DDR3/DDR2 GDDR5
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: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4670 1GB

Amazon.com

Check prices at:

Radeon HD 6450 (OEM) 1GB

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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