So will the i7 8700k work with anything below 2666mhz DDR4?

[NahWolf]

Wondering about that, I just bought a 32GB 2400mhz kit at a steal price.

[Simon771]

Yes it will work.

[WereCat]

Yes but expect lower performance

[dizmo]

Yes.

 

Now please send me some butter chicken and gulab jamun.

[NahWolf]

1 hour ago, WereCat said:

Yes but expect lower performance

how much of a performance decrease are we talking?

[SkilledRebuilds]

58 minutes ago, WolfzHere_- said:

how much of a performance decrease are we talking?

Faster System Ram mainly comes into play when your CPU gets loaded up..

Most tasks don't see a benefit, high CPU loaded apps will.
Intel is less sensitive to RAM speed upgrades and have been for quite a many generation.

If your really keen to find out, and no 8700K (low ram speed) tests exist.. then try to find 7700k/6700k ram speed benchmarks, it would likely tell a very similar story.

 

When your machine gets loaded up.. (Assassins Creed origins)

Slower Ram will give lower minimumfps by some small degree, but the specific drops themselves, maybe noticeable on both systems, and if noticed, may only be a 1-2fps difference... between the heavy operations on similar systems being tasked..

 

Google ram speed scaling and see if the costs are worth it, or if you do benefit enough to classify it as a "need to buy"

[WereCat]

1 hour ago, WolfzHere_- said:

how much of a performance decrease are we talking?

Let's say that OC on the CPU will make no performance uplift because it will starve on the RAM bandwidth. On stock, there won't be much of a difference.

 

I recommend checking the DigitalFoundry 8700k YT review as he tested it with different RAM speeds.

[ImNotThere]

1 hour ago, SkilledRebuilds said:

Faster System Ram mainly comes into play when your CPU gets loaded up..

Most tasks don't see a benefit, high CPU loaded apps will.
Intel is less sensitive to RAM speed upgrades and have been for quite a many generation.

If your really keen to find out, and no 8700K (low ram speed) tests exist.. then try to find 7700k/6700k ram speed benchmarks, it would likely tell a very similar story.

 

When your machine gets loaded up.. (Assassins Creed origins)

Slower Ram will give lower minimumfps by some small degree, but the specific drops themselves, maybe noticeable on both systems, and if noticed, may only be a 1-2fps difference... between the heavy operations on similar systems being tasked..

 

Google ram speed scaling and see if the costs are worth it, or if you do benefit enough to classify it as a "need to buy"

global foundry confirmed that tgeres a decent performance bump with faster ddr4 on coffee lake when overclocked

[NahWolf]

12 hours ago, WereCat said:

Let's say that OC on the CPU will make no performance uplift because it will starve on the RAM bandwidth. On stock, there won't be much of a difference.

 

I recommend checking the DigitalFoundry 8700k YT review as he tested it with different RAM speeds.

I've seen digital foundry's video I didn't include a test with 2400mhz. so I'm guessing the difference between 2400 and 2666 is a slight difference?

[Zeitec]

It will be fine at stock. You probably won't see much of a performance increase above like 4.6ghz due to memory bandwidth bottlenecking.