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Radeon HD 5770 vs Radeon HD 7750

Intro

The Radeon HD 5770 comes with clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Compare that to the Radeon HD 7750, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 5770 108 Watts
Difference: 53 Watts (96%)

Memory Bandwidth

Theoretically, the Radeon HD 5770 should perform a bit faster than the Radeon HD 7750 in general. (explain)

Radeon HD 5770 76800 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 4800 (7%)

Texel Rate

The Radeon HD 5770 will be much (more or less 33%) faster with regards to anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 5770 34000 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 8400 (33%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5770 is a better choice, but only just. (explain)

Radeon HD 5770 13600 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 800 (6%)

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 5770

Amazon.com

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Radeon HD 7750

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 5770 Radeon HD 7750
Manufacturer AMD AMD
Year October 13, 2009 February 2012
Code Name Juniper XT Cape Verde Pro
Memory 1024 MB 1024 MB
Core Speed 850 MHz 800 MHz
Memory Speed 4800 MHz 4500 MHz
Power (Max TDP) 108 watts 55 watts
Bandwidth 76800 MB/sec 72000 MB/sec
Texel Rate 34000 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800(160x5) 512
Texture Mapping Units 40 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 1500 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. 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 lots of other factors, most notably the memory bandwidth of the card - 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 5770

Amazon.com

Check prices at:

Radeon HD 7750

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

3 Responses to “Radeon HD 5770 vs Radeon HD 7750”
anonyme says:

Wow 2xof pconsum and a few difference of perfor

jakob says:

Yeah but the 5770 came out in 2009!! let's just put it that way, the 7750 is not a card to recommend to anyone willing to play something decent. Better spending a little more for a 7770 or better.

gamer says:

In games (fps) 7750 = 5770.
Ciao

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