New i7 4820k Ivy Bridge-E CPU

Christopher Gonzalez · Sep 14, 2013

Hey Guys!

I'm debating over the 4770k and the new 4820k CPUs. The 4820k all around looks more appealing (higher clock speed, low price) but then it scares me that the price is lower... Is the CPU just a good value or does each clock cycle perform less?

Or, if that doesn't matter and there is a clear winner for what I'm doing, here is what I'll be doing with the PC: Gaming, Gameplay Capturing, HD Video Editing, School Work, and a little Programming (most to least). Tell me what you think!

Here are the CPU's:

4820k: http://www.newegg.com/Product/Product.aspx?Item=N82E16819116940

4770k: http://www.newegg.com/Product/Product.aspx?Item=N82E16819116901

As said in the title, I might be doing some minor-average overclocking, around 4-4.5 Ghz... Surely no extreme enthusiast OCing...

bwrlane · Sep 14, 2013

Christopher Gonzalez :

The only benefit of the 4820k is that you can upgrade later to a hex core. It performs about 5% less per cycle, plus the motherboards are more expensive.

The 4770k is the better choice.

Christopher Gonzalez · Sep 14, 2013

bwrlane :

When you say that I could upgrade later to a hexa core CPU, what exactly do you mean? And I know the motherboards are expensive, that's a bit of a downside of LGA 2011...

And if the 4820k performs 5% less, but shares the same turbo speed as i7 4770k, than I guess the i7 4770k is the better CPU. With the turbo, that means that with sufficient cooling and when the need arises, the CPU will OC itself to a maximum of, in this case, 3.9 ghz, correct? So i7 4770k ends up performing 5% better?

Som3one · Sep 14, 2013

What he meant was that you could switch over to another hexacore CPU lateron, if you feel the need for it. You can´t do that on a Z87 chipset.

The 4770k is the better CPU regarding the performance per clock ratio. But the 4820k might overclock higher. But I am not sure about that.

Christopher Gonzalez · Sep 14, 2013

Som3one :

Oh, so that is more motherboard based, since the quad and hexa core share the same socket.

I'm not looking to get much of an overclock on my CPU, maybe 4 ~ 4.3 Ghz but pretty low, so I think the 4770k is the way to go.

Thanks for the answer!

ClamBumped · Sep 21, 2013

what about the 10MB vs 8MB L3 Cache
how much do you think that will effect things?

Christopher Gonzalez · Sep 21, 2013

ClamBumped :

That's true, I never took that into account, but then with an X87 mobo i'm gonna run my budget into the ground... What exactly is cache meant for? Where will having more benefit? I know that L3 is like really fast ram for the cpu, and L2 is faster, and L1 is fastest, but where would having 10 MB of cache benefit over 8 MB?

Thanks!

p.s. I appreciate you answering even after the best solution!

drawde · Oct 5, 2013

The greater the amount of cache the less frequently instructions or data must be fetched from RAM which is always slower than cache since cache storage is located on the CPU die. The more often data or instructions needed by the CPU are in cache the faster the processing occurs since the CPU doesn't have to wait as long for the data to be fetched from memory. The frequency of finding what is needed in cache is referred to as the cache hit ratio and the higher the value the faster the processing occurs. L1 is fastest followed by L2 and L3 being the slowest but still faster than RAM access. The more cache at all three levels generally speaking the faster the computer. Data and instructions pass between L1 L2 and L3 so they can be thought of as buffers for instructions and data and everything being processed by the CPU must pass through the cache first and will stay there until the cache space is need for other data and instructions. A least recently used algorithm, also called LRU, is used to keep the most active data and instructions in the fastest level of cache to speed up processing and remove the oldest items first when data is being passed between RAM and cache.

Christopher Gonzalez · Oct 5, 2013

drawde :

The greater the amount of cache the less frequently instructions or data must be fetched from RAM which is always slower than cache since cache storage is located on the CPU die. The more often data or instructions needed by the CPU are in cache the faster the processing occurs since the CPU doesn't have to wait as long for the data to be fetched from memory. The frequency of finding what is needed in cache is referred to as the cache hit ratio and the higher the value the faster the processing occurs. L1 is fastest followed by L2 and L3 being the slowest but still faster than RAM access. The more cache at all three levels generally speaking the faster the computer. Data and instructions pass between L1 L2 and L3 so they can be thought of as buffers for instructions and data and everything being processed by the CPU must pass through the cache first and will stay there until the cache space is need for other data and instructions. A least recently used algorithm, also called LRU, is used to keep the most active data and instructions in the fastest level of cache to speed up processing and remove the oldest items first when data is being passed between RAM and cache.

Thanks for the answer! That explains a lot.

gokul36 · Dec 7, 2013

So 4.7GHz max freq output from 4820k....Compared to other High End and Extreme i7 Processor.....4820k is best

But the Motherboards for tis Processor is Costly

Low End Motherboard Gigabyte GA-X79-UD3 250$ for X79 Chip IV-E Bridge

4820k s good .......

gokul36 · Dec 16, 2013

http://ark.intel.com/compare/77781,75123

see the difference for urself

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New i7 4820k Ivy Bridge-E CPU

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