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Beginner
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I would like to know if Intel Core i7-8700 is just compatible with a DDR4-2666 RAM memory or if this processor is compatible with another DDR4 memories

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Super User Retired Employee
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Intel specs their processors at the highest speed that they validate. Lower speeds should work just fine; you can use DDR4-2133, DDR4-2400 and/or DDR4-2666 without worry. Now, if you want to use faster memory, it might work, but understand that,

 

  • Intel hasn't validated the processor's memory controllers to run at these higher speeds. If Intel hasn't validated operation at these speeds, Intel doesn't warrant that the processor will operate at these speeds. You are on your own.
  • The motherboard's BIOS must have support for running memory at these speeds.
  • As Al indicated, the motherboard must also be designed to support memory running at these higher speeds. It must have circuitry that limits the noise on the memory buses such that, at these higher speeds, data can be reliably distinguished from noise.
  • While it may work initially, understand that, as circuit age, they produce more noise. If this builds to the point where noise cannot be distinguished from data, transfers will fail and the system will not function properly.

 

Hope this helps,

...S

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Super User
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You can find the memory specifications here:

https://ark.intel.com/content/www/us/en/ark/products/126686/intel-core-i7-8700-processor-12m-cache-u...

 

Also, it is going to depend on what the motherboard supports.

 

Doc

Doc (not an Intel employee or contractor)
Highlighted
Super User Retired Employee
15 Views

Intel specs their processors at the highest speed that they validate. Lower speeds should work just fine; you can use DDR4-2133, DDR4-2400 and/or DDR4-2666 without worry. Now, if you want to use faster memory, it might work, but understand that,

 

  • Intel hasn't validated the processor's memory controllers to run at these higher speeds. If Intel hasn't validated operation at these speeds, Intel doesn't warrant that the processor will operate at these speeds. You are on your own.
  • The motherboard's BIOS must have support for running memory at these speeds.
  • As Al indicated, the motherboard must also be designed to support memory running at these higher speeds. It must have circuitry that limits the noise on the memory buses such that, at these higher speeds, data can be reliably distinguished from noise.
  • While it may work initially, understand that, as circuit age, they produce more noise. If this builds to the point where noise cannot be distinguished from data, transfers will fail and the system will not function properly.

 

Hope this helps,

...S

View solution in original post

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Beginner
14 Views
Thank you very much for your answers. The explanation is very clear
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