Does fast ram affect overclocking?

[Kitsan]

Ive just been told that faster ram limits overclocking, is this true?

 

Would I still be able to hit 5ghz with 4133mhz ram on a 8700K?

[Princess Luna]

There are no real world benefits of having memory any faster than 3400mhz CL 14 (best performance ratio).

 

At 4133mhz you'll have bad timings which will result in an over all worse performance, if you just want to do it for bragging rights and what not it'll depend on how good your CPU silicon is and how good your Motherboard is also... without obviously mentioning you'll need highly binned memory.

[Kitsan]

Just now, Princess Cadence said:

There are no real world benefits of having memory any faster than 3400mhz CL 14 (best performance ratio).

 

At 4133mhz you'll have bad timings which will result in an over all worse performance, if you just want to do it for bragging rights and what not it'll depend on how good your CPU silicon is and how good your Motherboard is also... without obviously mentioning you'll need highly binned memory.

 

Im not sure that is what I asked?

 

Also i've read a few articles which directly contradict what you're saying, i'll see if I can find one...

[Kitsan]

https://www.guru3d.com/articles_pages/patriot_viper_steel_4000_mhz_cl19_ddr4_review,14.html

 

Im sure I could find more

[Dedayog]

Just now, remus243 said:

https://www.guru3d.com/articles_pages/patriot_viper_steel_4000_mhz_cl19_ddr4_review,14.html

 

Im sure I could find more

You can still hit 5GHz on your 8700K with that RAM.  Should see a small FPS increase as well, over 3200 for example..

 

 

[Turtle Rig]

7 minutes ago, Princess Cadence said:

There are no real world benefits of having memory any faster than 3400mhz CL 14 (best performance ratio).

 

At 4133mhz you'll have bad timings which will result in an over all worse performance, if you just want to do it for bragging rights and what not it'll depend on how good your CPU silicon is and how good your Motherboard is also... without obviously mentioning you'll need highly binned memory.

I agree on this note.  Ill take tighter timings over Mhz speed any day.  The CPU can only welcome in a certain ammount of data at once.  3200Mhz is more then enough ,, even 2400 is fine and will actually give better latency.

[Kitsan]

But im not really asking this, i'm asking if having fast ram has a measurable impact on stable cpu overlock?

[.Apex.]

8 minutes ago, Princess Cadence said:

At 4133mhz you'll have bad timings which will result in an over all worse performance

that's not true, 4133mhz CL17/18 is ALOT faster than 3400 CL14, but it won't do a damn thing if you don't have a CPU that can chew through all that data.

[Jurrunio]

It does hurt CPU core and uncore frequency a bit, because faster memory means data gets shoved into the CPU faster, so the CPU has more work to do. More work = more likely to crash dodgy settings.It's nowhere near as significant as on Core i compared to Ryzen, but it is something

 

14 minutes ago, Princess Cadence said:

There are no real world benefits of having memory any faster than 3400mhz CL 14 (best performance ratio).

In terms of buying memory, yes. Running memory though, faster is always better (though not XMP settings on 4000MHz+ kits, those are garbage)

[Kitsan]

Thank you jstudrawa and Jurrunio for answering my question

[Kitsan]

Just now, jstudrawa said:

You can still hit 5GHz on your 8700K with that RAM.  Should see a small FPS increase as well, over 3200 for example..

 

 

This is a really good video and as I game at 1080, that is the sweet spot at 4133Mhz. I mostly want it to help with the FPS low drops.

[Mira Yurizaki]

12 minutes ago, Princess Cadence said:

There are no real world benefits of having memory any faster than 3400mhz CL 14 (best performance ratio).

 

At 4133mhz you'll have bad timings which will result in an over all worse performance, if you just want to do it for bragging rights and what not it'll depend on how good your CPU silicon is and how good your Motherboard is also... without obviously mentioning you'll need highly binned memory.

 

3 minutes ago, Turtle Rig said:

I agree on this note.  Ill take tighter timings over Mhz speed any day.  The CPU can only welcome in a certain ammount of data at once.  3200Mhz is more then enough ,, even 2400 is fine and will actually give better latency.

Remember that timings are based on clock cycles. A higher number does not necessarily mean worse latency. For example, a DDR4-4000 module with a CAS latency of 18 has worse latency than a DDR4-4266 module with a CAS latency of 19. Even the difference between DDR4-3200 with a CAS latency of 14 isn't tons better than the DDR4-4266 (we're talking like 8 picoseconds of difference)

 

4 minutes ago, Jurrunio said:

It does hurt CPU core and uncore frequency a bit, because faster memory means data gets shoved into the CPU faster, so the CPU has more work to do. More work = more likely to crash dodgy settings.It's nowhere near as significant as on Core i compared to Ryzen, but it is something

 

In terms of buying memory, yes. Running memory though, faster is always better (though not XMP settings on 4000MHz+ kits, those are garbage)

The only reason why Zen is sensitive to memory speed is because the intra-processor communication speed is tied to MemClk. The intraprocessor communication bus is independent of MemClk on Intel CPUs.

[Kitsan]

Do you think this will be a thing for Zen 2?

[Mira Yurizaki]

Just now, remus243 said:

Do you think this will be a thing for Zen 2?

Processor performance being sensitive to memory speed? Probably, since AMD doesn't look like they're budging from the Infinity Fabric design any time soon.

[Jurrunio]

8 minutes ago, remus243 said:

This is a really good video and as I game at 1080, that is the sweet spot at 4133Mhz. I mostly want it to help with the FPS low drops.

what you should look for comparisons is 4133 CL19 versus say 3733 CL14, there's a reason why people use lower frequency but much shorter timings for benchmark competitions

 

2 minutes ago, remus243 said:

Do you think this will be a thing for Zen 2?

If AMD stick to their stupid idea of linking memory frequency to uncore (infinity fabric) frequency, yes.

 

6 minutes ago, Mira Yurizaki said:

The only reason why Zen is sensitive to memory speed is because the intra-processor communication speed is tied to MemClk. The intraprocessor communication bus is independent of MemClk on Intel CPUs.

and then also include a weak memory controller comparable to X99, excellent job there AMD

[Kitsan]

Thats disappointing I bought this RAM as a part I wanted to carry over to the next generation if zen 2 is as good as its being hyped

[Kitsan]

Just now, Jurrunio said:

what you should look for comparisons is 4133 CL19 versus say 3733 CL14, there's a reason why people use lower frequency but much shorter timings for benchmark competitions

 

If AMD stick to their stupid idea of linking memory frequency to uncore (infinity fabric) frequency, yes.

 

and then also include a weak memory controller comparable to X99, excellent job there AMD

 

What ram would you recommend?

(Link or kit name plx)

[Jurrunio]

4 minutes ago, remus243 said:

Thats disappointing I bought this RAM as a part I wanted to carry over to the next generation if zen 2 is as good as its being hyped

you can still use it on Zen 2, just different settings. Currently on Ryzen with sticks this good, you just set frequency to 2933 (1st gen) or 3466 (2nd gen) (these are as fast as their memory controllers are usually good for), then slam the timings down as much as possible. This will be the same tactic on Zen 2 if AMD doesn't fix it.

[Turtle Rig]

41 minutes ago, remus243 said:

But im not really asking this, i'm asking if having fast ram has a measurable impact on stable cpu overlock?

Nothing to do with it.  RAM and CPU have nothing to do each other as far as OCing.  If you OC your CPU your stressing your CPU, and if you overclock the RAM or downclock and tighten timings your stressing your RAM.  You can put a 2133 kit and be just fine, I promise you wont see difference in anything except benchmarks.  As I said CPU can only welcome certain amount and speed at once, and DDR4 starting with 2133 and 2400 is fine.  I mean their coming out with DDR5 6400Mhz ,, so you telling me double the MHz equals 30fps more in a game ?  Nope not oa chance.  maybe 5 fps more compared to DDR4 2400Mhz.

[Turtle Rig]

This is the big secret about RAM that the sellers don't want you to know. Or the companies that make the DDR4 RAM kits.  Just because its 3200Mhz or 4000Mhz you will get the same real world performance.  So 4000Mhz to DDR5 6400Mhz your telling me your system would improve in speed, I beg to differ.

[Kitsan]

Just now, Turtle Rig said:

Nothing to do with it.  RAM and CPU have nothing to do each other as far as OCing.  If you OC your CPU your stressing your CPU, and if you overclock the RAM or downclock and tighten timings your stressing your RAM.  You can put a 2133 kit and be just fine, I promise you wont see difference in anything except benchmarks.  As I said CPU can only welcome certain amount and speed at once, and DDR4 starting with 2133 and 2400 is fine.  I mean their coming out with DDR5 6400Mhz ,, so you telling me double the MHz equals 30fps more in a game ?  Nope not oa chance.  maybe 5 fps more compared to DDR4 2400Mhz.

Did you watch the video jstudrawa posted, clearly shows an fps difference at 1080.

 

Also I disagree that it has nothing to do with it, the memory controller is in the cpu and it has to handle extra data so it is more likely to heat up.

[Turtle Rig]

Just now, remus243 said:

Did you watch the video jstudrawa posted, clearly shows an fps difference at 1080.

 

Also I disagree that it has nothing to do with it, the memory controller is in the cpu and it has to handle extra data so it is more likely to heat up.

Well yes your right, you have to keep the RAM to check, and not overclock with the multi,, just use XMP.  It just its not a dramatic increase but your right there is a difference.  Most will not notice unless they have stats and see its 10fps more or 15fps more.

[Turtle Rig]

IMO , 3200Mhz and DDR5 6400Mhz Doesn't mean your sh*T is gonna be twice as fast ya know...… As you or the other chap said yes memory controller all that stuff is important how it behaves with CPU.  Im just saying you can have bad ram and still raise the multi and go with XMP and proper timings as well.