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Radeon HD 6770 1GB vs Radeon HD 7750

Intro

The Radeon HD 6770 1GB has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features 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.

Compare those specs to the Radeon HD 7750, which makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM runs at a frequency of 1125 MHz on this card. It features 512 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 6770 1GB 108 Watts
Difference: 53 Watts (96%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 should be a small bit faster than the Radeon HD 6770 1GB overall. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 6770 1GB 67200 MB/sec
Difference: 4800 (7%)

Texel Rate

The Radeon HD 6770 1GB will be quite a bit (about 41%) faster with regards to anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 10400 (41%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6770 1GB is superior to the Radeon HD 7750, not by a very large margin though. (explain)

Radeon HD 6770 1GB 14400 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 1600 (13%)

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 6770 1GB

Amazon.com

Radeon HD 7750

Amazon.com

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 6770 1GB Radeon HD 7750
Manufacturer AMD AMD
Year January 2011 February 2012
Code Name Juniper XT Cape Verde Pro
Memory 1024 MB 1024 MB
Core Speed 900 MHz 800 MHz
Memory Speed 4200 MHz 4500 MHz
Power (Max TDP) 108 watts 55 watts
Bandwidth 67200 MB/sec 72000 MB/sec
Texel Rate 36000 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800 512
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 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 get to the max fill rate.

Comments

5 Responses to “Radeon HD 6770 1GB vs Radeon HD 7750”
Gamer PC für D3 für möglichst wenig Geld :) - Seite 4 - Diablo 3 Forum | inDiablo.de by ingame™ says:

[...] deutlich sparsamer. Man schaue sich mal die MAX TDP an (wobei die ja eh schon nie erreicht wird): Radeon HD 6770 1GB vs Radeon HD 7750 – Performance Comparison Benchmarks @ Hardware Compare Es geht hier darum, genau auf die Bedürfnisse einen PC zuzu schneiden. Größere Grafikkarten [...]

Wird Diablo 3 auf meinem PC FLÜSSIG spielbar sein? - Seite 22 - Diablo 3 Forum | inDiablo.de by ingame™ says:

[...] von LongM Sicher dass die 265watt reichen? Für die graka? Radeon HD 6770 1GB vs Radeon HD 7750 – Performance Comparison Benchmarks @ Hardware Compare 55W max TDP, kein extra Stromanschluss am Netzteil... Was fürn i5 hast du und was für restliche [...]

placa video - My Garage says:

[...] este ca 7750 consuma mai putin si este mai rece,ca si performanta este putin mai buna 6770. Uite aici o comparatie. __________________ Conserva mea cu jucării YouTube Battlefield 3 Fragmovie [...]

Need help in choosing a graphics card - Digit Technology Discussion Forum says:

[...] Need help in choosing a graphics card 6770 vs 7750 a basic info.. Benchmarks just browse through all benchmarks.. with the fact in mind that 6770 is [...]

T. Video + Fuente para esta Config says:

[...] lei en este "review" consume menos que una equivalente en precio como la 6770. Fuente: Radeon HD 6770 1GB vs Radeon HD 7750 – Performance Comparison Benchmarks @ Hardware Compare Ahora, no se si tendre algun problema meterle una Nvidia si tengo proce amd, es una ignoracia de [...]

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