CPU speed beyond memory speed

[Alvin Putra]

First, i am newbie here so be gentle.

Screenshot:

I was testing my computer processor stress test using prime95 to check my processor speed, so I got the maximum speed turbo boost all 4 cores about 3.6 GHz.
So what i'm confused is how the processor speed could beyond the memory speed 3200 MHz? (Correct me if wrong). Also if a processor with 2 cores 1.3 GHz, is it true using 1333 MHz of RAM dual channel mode will be enough or to fast? Thank you.

Specs:
Processor: Intel i5 4670K
Memory: Corsair cmz8gx3m2a1600c9 dual channel @ 1333 MHz
Motherboard: GA Z87m-D3H

 

[JamesLeaverland]

Hey !

You shouldn't worry about your RAM speed, as long as it is over 800MHz it's not realistically going to impact your perforance in any real world usage scenario.

 

[Tradesman1]

The CPU sppeed and DRAM speed haven't been tied together for a long time, that goes back to the 775 mobos, here though you have 1600 DRAM and it's running at 1333, should go into BIOS, enable XMP and select profile 1 and your DRAM will be up to 1600 where it should be

 

[Alvin Putra]

The CPU sppeed and DRAM speed haven't been tied together for a long time, that goes back to the 775 mobos, here though you have 1600 DRAM and it's running at 1333, should go into BIOS, enable XMP and select profile 1 and your DRAM will be up to 1600 where it should be

oh yes i forgot that my memory is running at 1333 MHz and should be 2700 MHz in dual mode. XMP profile was disabled purposely. btw, I dont know CPU speed and DRAM speed haven't been tied together as you say, so if that case, how to choose the suitable RAM speed, example for my processor, because there are many RAM speed from 1066, 1333, 1600, 2133, etc? Also can i calculate if that's possible?

Sorry my english is not somewhat good.

 

[Tradesman1]

It's 1333, it runs at 1333 whether in single, dual, tri or quad channel. Would enable XMP

 

[Alvin Putra]

It's 1333, it runs at 1333 whether in single, dual, tri or quad channel. Would enable XMP

ya i know that, I mean like this
http://www.hardwaresecrets.com/article/Everything-You-Need-to-Know-About-the-Dual-Triple-and-Quad-Channel-Memory-Architectures/133/3
The bandwidth.

 

[Tradesman1]

As the article say, the bandwidth is theoretical, in actual practice/use you might see a 10-15% gain in bandwidth on Intel and less on AMD (due to the weaker MCs (memory controllers)

 

[Alvin Putra]

is it ok to have high speed ram for low speed processor? like core i3 1.5 GHz using two 2133 MHz of RAM? May be the highest efficiency?

 

[Tradesman1]

DRAM is dependent on capabilities of the MC (memory controller) in the CPU (if you want to run at full data rates. For an i3 are generally looking at 1333/1600

 

[Alvin Putra]

DRAM is dependent on capabilities of the MC (memory controller) in the CPU (if you want to run at full data rates. For an i3 are generally looking at 1333/1600

I think this is what I want to know.

 

[Tradesman1]

Glad I could help