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Radeon HD 6450 (OEM) vs Radeon HD 6770 1GB

Intro

The Radeon HD 6450 (OEM) features a core clock speed of 625 MHz and a GDDR3 memory speed of 800 MHz. It also features a 64-bit bus, and makes use of a 40 nm design. It is comprised of 160 SPUs, 8 Texture Address Units, and 4 ROPs.

Compare all that to the Radeon HD 6770 1GB, which features a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 6770 1GB 108 Watts
Difference: 77 Watts (248%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6770 1GB should theoretically be a lot superior to the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 6770 1GB 67200 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 54400 (425%)

Texel Rate

The Radeon HD 6770 1GB is quite a bit (more or less 620%) more effective at texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 31000 (620%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6770 1GB is the winner, by far. (explain)

Radeon HD 6770 1GB 14400 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 11900 (476%)

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 6450 (OEM)

Amazon.com

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Radeon HD 6770 1GB

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 6450 (OEM) Radeon HD 6770 1GB
Manufacturer AMD AMD
Year February 2011 January 2011
Code Name Caicos Juniper XT
Memory 512 MB 1024 MB
Core Speed 625 MHz 900 MHz
Memory Speed 1600 MHz 4200 MHz
Power (Max TDP) 31 watts 108 watts
Bandwidth 12800 MB/sec 67200 MB/sec
Texel Rate 5000 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 2500 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 160 800
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 370 million 1040 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core 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 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 ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6450 (OEM)

Amazon.com

Check prices at:

Radeon HD 6770 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.

Comments

One Response to “Radeon HD 6450 (OEM) vs Radeon HD 6770 1GB”
Nieuwe PC op het oog says:

[...] houd dat ik geheugen en videokaart later nog kan upgraden. Ik heb de videokaarten vergeleken op Radeon HD 6450 (OEM) vs Radeon HD 6770 1GB – Performance Comparison Benchmarks @ Hardware Comp... daar heb ik alle videokaarten die hier tussen staan met mekaar vergeleken en de Radeon HD 6850 was [...]

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