Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 7770 vs Radeon HD 7950 3GB

Intro

The Radeon HD 7770 uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this model. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Compare all that to the Radeon HD 7950 3GB, which makes use of a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this card. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 120 Watts (150%)

Memory Bandwidth

Performance-wise, the Radeon HD 7950 3GB should theoretically be much better than the Radeon HD 7770 overall. (explain)

Radeon HD 7950 3GB 240000 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 168000 (233%)

Texel Rate

The Radeon HD 7950 3GB is a lot (more or less 124%) more effective at texture filtering than the Radeon HD 7770. (explain)

Radeon HD 7950 3GB 89600 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 49600 (124%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 7950 3GB is the winner, and very much so. (explain)

Radeon HD 7950 3GB 25600 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 9600 (60%)

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

Display Prices

Hide Prices

Radeon HD 7770

Amazon.com

Check prices at:

Radeon HD 7950 3GB

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

Display Specifications

Hide Specifications

Model Radeon HD 7770 Radeon HD 7950 3GB
Manufacturer AMD AMD
Year February 2012 January 2012
Code Name Cape Verde XT Tahiti Pro
Memory 1024 MB 3072 MB
Core Speed 1000 MHz 800 MHz
Memory Speed 4500 MHz 5000 MHz
Power (Max TDP) 80 watts 200 watts
Bandwidth 72000 MB/sec 240000 MB/sec
Texel Rate 40000 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 640 1792
Texture Mapping Units 40 112
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 1500 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. It's 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 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR 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 clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7770

Amazon.com

Check prices at:

Radeon HD 7950 3GB

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

2 Responses to “Radeon HD 7770 vs Radeon HD 7950 3GB”
jose says:

no se olvides de las placas ati serie hd2xxx como la 2900tx que son de 512 bit puros 740 mhz de core y 1024 gddr4
y la linea 7 de nvidia como la 7950gx2 1 gb ram gddr3 256 bit x2 y y los core x2

Roger That says:

Brilliant site.

Suggestion....

Can we choose between THREE cards in the future some time?

Much happier; because you can put in your current card and the choice between the two you are looking to buy.

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield