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

Intro

The Radeon HD 4670 512MB has core clock speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Compare those specifications to the Radeon HD 6450 (OEM), which has GPU core speed of 625 MHz, and 512 MB of GDDR3 memory running at 800 MHz through a 64-bit bus. It also features 160 Stream Processors, 8 Texture Address Units, and 4 ROPs.

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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

In theory, the Radeon HD 4670 512MB is 150% quicker than the Radeon HD 6450 (OEM) in general, due to its higher data rate. (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 is quite a bit (about 380%) better at anisotropic 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 (more or less 140%) more effective at AA than the Radeon HD 6450 (OEM), and capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should 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 AA, HDR 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 calculated by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability 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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