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Radeon HD 4650 1GB vs Radeon HD 6450 (OEM)

Intro

The Radeon HD 4650 1GB comes with a GPU clock speed of 600 MHz, and the 1024 MB of GDDR3 RAM is set to run at 700 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 TAUs, and 8 ROPs.

Compare those specifications to the Radeon HD 6450 (OEM), which has a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 RAM running at 800 MHz through a 64-bit bus. It also is made up of 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 4650 1GB 55 Watts
Difference: 24 Watts (77%)

Memory Bandwidth

The Radeon HD 4650 1GB should theoretically perform much faster than the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 4650 1GB 22400 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 9600 (75%)

Texel Rate

The Radeon HD 4650 1GB should be quite a bit (more or less 284%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 4650 1GB 19200 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 14200 (284%)

Pixel Rate

The Radeon HD 4650 1GB will be much (approximately 92%) faster with regards to anti-aliasing than the Radeon HD 6450 (OEM), and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 4650 1GB 4800 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 2300 (92%)

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 4650 1GB

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 4650 1GB Radeon HD 6450 (OEM)
Manufacturer AMD AMD
Year Sep 10, 2008 February 2011
Code Name RV730 PRO Caicos
Memory 1024 MB 512 MB
Core Speed 600 MHz 625 MHz
Memory Speed 1400 MHz 1600 MHz
Power (Max TDP) 55 watts 31 watts
Bandwidth 22400 MB/sec 12800 MB/sec
Texel Rate 19200 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 4800 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 320(64x5) 160
Texture Mapping Units 32 8
Render Output Units 8 4
Bus Type GDDR3 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 (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling 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 write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4650 1GB

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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