i7 8700k with 4500Mhz Dimm

Anlaf Cununc

Anlaf Cununc

Anlaf Cununc

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1 Dec 2017
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35
Hey guys, so recently I bought this RAM from overclockers to run it on my Asus Maximus X Apex motherboard. The RAM works perfectly fine on 2133MHZ but when I use the xmp i.e.
  • 4500MHz RAM Speed
  • CAS 18-20-20-44 Timings
  • 1.45v VDIMM

The PC then doesn't even boot. Can someone let me know why this might be happening? Why won't it work when that 8Pack has specified? I am using 8700k with it too
 
for that speed the IMC needs to be a good one as well. You shold try to raise vccio and vsa gradually up to 1.3v maximum for 24/7.
 
Ian Parry from 8pack says it could be imc for code 55?

This is what he said

It's not the ram issue though it's the cpu imc. 55 tends to mean the memory can reach the frequency but needs tuning. In this case we know the board is fine to run the memory so must be cpu imc.

Regards
 
I bought 4266Mhz ram to go with a 8700k build. I've got 2 dimm slots on my board (like the Apex) so in theory it should be good for over 4000Mhz but I can not get it stable over 4000MHz for love nor money.

Like yourself if I set XMP in the bios I won't boot at all. It's slightly annoying but I'm just going to live with it at 4000Mhz.

Have you tried any other frequencies aside from 2133Mhz and 4500MHz? You won't lose much performance if you run at a lower frequency but with slightly tighter timings, so maybe try that.

I understand it's annoying but it's a slight risk you take.

I tried everything, increasing ram voltage, messing with SA and IO voltage etc
 
Before you do that it's worth trying a lower frequency to see the highest you can actually boot (and be stable) at.

You might be able to do 4266Mhz for example. It's worth a shot, and then you can weigh up whether it's worth keeping them, or sending them back.

The reason I didn't bother sending them back is because DDR4 is going to be good for a while, and I reckon the next chipset and cpu's will have even better compatibility at higher speeds.

I paid £279.99 for my 4266Mhz, so if your board/cpu is capable of running those speeds you could send yours back and make a nice little saving of around 70 quid.
 
4500 has been tested by Asus on that board and will reach the next qvl.

55 has several meanings. Cpu socket pins, ram socket issue or contact issue elsewhere with a warped board. Imc can't train. Usually 55 if contact is good means mem can reach frequency with good imc and tuning.

Cost does not mean things won't have issues this product is like the formula one of memory and it needs all other factors to be working perfectly. On 7740x and ocf or apex always working because they have stronger imc.
 
Cpu socket pins - pins are fine I checked those before I installed the cpu
Ram socket - is fine my other ram is working fine on it
Warped board - board is fine too

If IMC is cpu based then I cannot do much about it can I? I wasn't expecting to do all this as I have never overclocked RAM before. In the past I just used xmp and that had worked fine. I was recommended this board by someone at overclockers to work with my CPU and this ram. They told me that this ram had been tested with Asus Maximux X Apex and with 8700k with using just the xmp? I had to order another pair of the same RAM to make sure it wasn't the RAM that was faulty. Both of them failed to work with the XMP and I had to spend all this money based on Overclockers recommendation. Now I am having to send 2 pairs of these dimms back as I am not able to get them to work.
 
Not all 8700k imc is string enough. None of the products are faulty. I will post next week your configuration running fine. I tried it so did Asus. But not every cpu can reach 4500. It's that simple. Just like not every cpu can do 5,3 or 5,4 memory overclocking is no different.
 
Yes but CPUs work fine on default settings. This RAM comes with advertised 4500MHz. 8700k comes with advertised 3.7GHz with turbo at 4.7GHz. Now you cannot make the same comparison as you get what you see on the tin with 8700k but not so with this ram. Here is the qvl list and it doesn't show this RAM there either list
 
It's only just been qvl tested recently.

The ram also works fine at default settings which is 2133mhz. Xmp is an xtreme memory profile. The imc on the cpu is out of spec to run the ram at even close to these speeds. The imc on an 8700k being rated for 2666mhz. Of course you can make the same comparison.

With apex x299 or ocf x299 and 7740 cpus the kits are working one hundred percent of the time as the imc is stronger. Even 4600 mem test is fine.
 
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Yes like I said 3.7GHz is default and 4.7GHz is turbo stable. From RAMs I have tested before default is 2133 and xmp is like the turbo on a cpu which works without having to overclock. I was recommended this RAM by overclockers and wasn't told anything about imc and timings etc. After a lot of waste of time and money I had to post this on here to get some knowledge on the issue. Now I have been told to do specific changes to the RAM to get an optimum frequency so I am not getting what it says on the tin? I have no idea how to select what timings plus it is highly frustrating and time consuming to learn all of this.
 
I will post next week your configuration running fine.
Click to expand...

Will you do it for the same setup 8700k with ASUS Maximus X Apex?

with the following speeds as it says on the tin?
  • 4500MHz RAM Speed
  • CAS 18-20-20-44 Timings
  • 1.45v VDIMM
Would like to see if it does work then I will buy that 8700k off you. Bu if you are going to be using lower speeds then or higher timings then whats the point?
 
Anlaf Cununc said:
I was recommended this RAM by overclockers and wasn't told anything about imc and timings etc.
Click to expand...

I would imagine because you expressed an interest in benchmarking or having the fastest RAM possible no matter the cost? If you didn't, then I'd send it back and get 3200/3600.


Anlaf Cununc said:
Plus both 7740x and 8700k shows 2666 is the max they can handle as shown in the following link

https://ark.intel.com/compare/121499,126684
Click to expand...

That's the default speed and anything above that is considered an overclock. The speed also depends on the motherboard (which is why some motherboards show their own speeds, higher than that), as well as the strength of the IMC on your particular chip as has been said.

Honestly, if you don't know this stuff and have no interest in it, then send it back. This high frequency RAM which may or may not operate at max rated frequency depending on board/your chip (silicon lottery) is aimed more at enthusiasts.
 
Danny75 said:
That's the default speed and anything above that is considered an overclock. The speed also depends on the motherboard (which is why some motherboards show their own speeds, higher than that), as well as the strength of the IMC on your particular chip as has been said.

Honestly, if you don't know this stuff and have no interest in it, then send it back. This high frequency RAM which may or may not operate at max rated frequency depending on board/your chip (silicon lottery) is aimed more at enthusiasts.
Click to expand...

Well that is something Overclockers should have told me though. I was shocked by the level of advice I was given even after I told them about the issue. Yeah I guess 3600 would be a better choiec
 
Have you not tried a slightly lower speed? A couple of hundred Mhz isn't going to make a difference in performance.

If you're adamant on 4500Mhz you can try increasing VCCSA and VCCIO voltages. Try setting both of them to 1.2v. Realistically they're going to need to be minimum 1.15v to run ram at that speed.

I assume they're on auto, so what is the motherboard setting the voltage at? If it's setting the voltage too high that can cause issues too, as from my own experience sometimes setting SA and IO voltage too high can cause issues.

The Apex (and high end itx boards) is pretty much as good as it get's in terms of memory overclocks due to having only 2 dimm slots, so you've got a good foundation. But it comes across as though you're not willing to try and tweak anything. Which is a shame as the Apex is aimed at tweakers and hardcore overclockers who want to tweak everything.

While we'd all love for everything to be plug and play, it often rarely is with PC's lol.
 
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Anlaf Cununc said:
Well that is something Overclockers should have told me though. I was shocked by the level of advice I was given even after I told them about the issue. Yeah I guess 3600 would be a better choiec
Click to expand...

When you buy a Ferrari they don't teach you how to drive like a Formula 1 driver, same deal here. To get the best out of it, you have to be confident in yourself to know what you're doing, not just completely rely on others. I'm also 100% sure that you're getting many times more help at OCuk than if you bought from any other place. If you want a serious machine with no fuss, buy direct from the 8pack line, that's why it's there :)
 
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