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Radeon HD 6450 (OEM) vs Radeon HD 7770

Intro

The Radeon HD 6450 (OEM) comes with a GPU core speed of 625 MHz, and the 512 MB of GDDR3 memory is set to run at 800 MHz through a 64-bit bus. It also features 160 Stream Processors, 8 Texture Address Units, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 7770, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory runs at a speed of 1125 MHz on this card. It features 640 SPUs along with 40 TAUs and 16 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7770 3180 points
Radeon HD 6450 (OEM) 340 points
Difference: 2840 (835%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 7770 80 Watts
Difference: 49 Watts (158%)

Memory Bandwidth

In theory, the Radeon HD 7770 is 463% faster than the Radeon HD 6450 (OEM) overall, because of its higher data rate. (explain)

Radeon HD 7770 72000 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 59200 (463%)

Texel Rate

The Radeon HD 7770 should be quite a bit (more or less 700%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 35000 (700%)

Pixel Rate

The Radeon HD 7770 will be quite a bit (more or less 540%) more effective at full screen anti-aliasing than the Radeon HD 6450 (OEM), and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7770 16000 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 13500 (540%)

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 7770

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 7770
Manufacturer AMD AMD
Year February 2011 February 2012
Code Name Caicos Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 625 MHz 1000 MHz
Memory Speed 1600 MHz 4500 MHz
Power (Max TDP) 31 watts 80 watts
Bandwidth 12800 MB/sec 72000 MB/sec
Texel Rate 5000 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 2500 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 160 640
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 370 million 1500 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling 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 graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 6450 (OEM)

Amazon.com

Check prices at:

Radeon HD 7770

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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