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Core i7-3770K Vs Core i7-3820

– The Core i7-3770K and the Core i7-3820 are processors from different categories and there is little common between them as far as the architecture goes.

– The Core i7-3770K belongs to the newer Ivy Bridge group while the Core i7-3820 is a part of the Sandy Bridge E processors. Notice that Sandy Bridge E is a different from Sandy Bridge – it is a different die, has quad core memory channel.

– The sockets of the two processors are different. The Core i7-3770K will use the LGA1155 socket while the Core i7-3820 needs LGA2011 socket. Expect the motherboard for the i7-3820 to be slightly more expensive.

-In processor performance the Core i7-3770K is slightly better, owing to its improved Ivy Bridge architecture.

-The i7-3770K also comes with integrated Graphics. The Core i7-3820 does not come with any integrated graphics.

Table : Core i7-3770K Vs Core i7-3820 Feature Differences

Feature Core i7-3770K Core i7-3820
Core Frequency 3.50 GHz 3.6 GHz
No. Of Cores 4 (4 Hyperthreads) 4 ( 8 Hyperthreads)
Cache Organization 8 MB L3 10 MB L3
Turbo Frequency 3.90 GHz 3.9 GHz
TDP Rating 77 Watts 130 Watts
64 Bit Support Y Y
Lithography 22 nm 32 nm
Integrated Memory Controller DDR3-1600 /1333 DDR3 ( 4 Channel)
Integrated Graphics Intel HD 4000 , 650 MHz Base, 1150 MHz Turbo No GPU


Table : Core i7-3770K Vs Core i7-3820 Benchmarking Comparison

Benchmarks Core i7-3770K Core i7-3820
PassMark CPU Mark Score
11500 9677
Super Pi 2M (Lower in better)
Not available Not available
3D Mark 06 CPU
7170 6794
Windows 7 Experience Score
Not available Not available


Some more details of Core i7-3770K

The Core i7-3770K bumps up the base clock frequency of the Core i7-3700 by 100 MHz. The Suffix K denotes officially unlockable part , and , owing to the 22 nm Ivy Bridge process. Given the same clock frequency, the Ivy Bridge processor is expected to provide 10 to 15% more improvement over the Sandy Bridge processor.

Some more details of Core i7-3820

The Core i7-3820 is DIFFERENT from othe core i7 Sandy Bridge processors. It is a part of the Sandy Bridge E-Series and has a bigger LGA 2011 socket. It will require a different and slightly more expensive motherboard to support LGA 2011 socket. The regular Sandy Bridge processors have Dual Channel DDR3 lanes, while this one has quad core DDR3 lane making the memory transfer fast. The processor has been priced competitively at $285.

The Intel Core i7-3820 is the cheapest Sandy Bridge E processor that will fit in the LGA 2011 socket. It has only 4 cores ( unlike the i7-3960X and i7-3930K that have 6 cores), but has higher base and turbo clock frequencies. In overall, you will be a comparable low threaded ( upto 4 cores) performance. It has quad core memory channel. The Core i7-3820 does not support native overclocking ( it is not a K part). If you are looking at a low cost system, this $294 processor has great potential that could be upgraded to higher processors if required.

Further Suggested Readings

The i7-3770K belongs to Ivy Bridge. Check out the Ivy Bridge Architecture.

Related posts:

  1. Intel Core i7-3820 Vs Core i7-2600
  2. Core i7-3820 Vs Core i7-2600K
  3. Intel Core i7-3820 Vs Core i7-2700K
  4. Core i7-3930K Vs Core i7-3770K
  5. Intel Core i7-3820 – Sandy Bridge E processor

2 Response

  1. Barby says:

    The price difference between the two processors is very small. The i7-3770K is only slightly more expensive than the i7-3820. The 3820 made sense when IB was not released. There is a lot of support for Ivy Bridge now ( have more motherboards – cheaper as well). So i7-3770K makes more sense.

  2. Ben says:

    If you look at the sysmark 2012 overall score – the i7-3770K is 228 while the 3820 is 212. Obviously the Ivy Bridge rocks.

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