16GB (8x2) G.Skill Ripjaws V 2400mhz won't run at 2400mhz

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raseclog

Commendable
Jul 2, 2017
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I understand there are related posts to my issue, but unfortunately, they did not help solve my problem. After installing two 8GB memory sticks rated at 2400 mhz with latency of 15-15-15-35, I discovered on CPU-Z that they were only running at 2133 mhz. As suggested in other threads, I went into BIOS and loaded the XMP profile for 2400 mhz and it worked right after saving and exiting. However, once I shut down the computer and started it back up, the PC would restart 5 times during POST and revert the memory speeds back to 2133 mhz. In BIOS, it seems when reverted back to auto, the latency is changed to 15-15-15-36 as well. Could it be that one of or both memory sticks are faulty or is something else going on here?

Here's a link to the exact memory I purchased: https://www.amazon.com/gp/product/B017QGNE6M/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

My system:
R5 1600x @ 3.6ghz with Corsair H60 AIO
16GB (8GB x 2) G.Skill Ripjaws 2400mhz 15-15-15-35
MSI B350M Gaming Pro mobo BIOS v2.8 (latest)
GTX 1070 8GB with NZXT G10 bracket and H55 AIO
Adata 256 GB M.2 NVMe SSD + 1TB 7200 HDD
EVGA 550W PSU 80+ silver
 
Solution
Aeacus
Did you buy your RAM as a kit of 2 or both sticks separately? Because when you buy RAM separately then there's 50:50 chance they work together, while with kit set, RAM manufacturer has tested and confirmed that all RAMs in a kit are working together without issues.
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Aeacus

Aeacus

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Mar 21, 2015
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Few things to try:

Remove one stick of 8GB of RAM and look if you can get the single stick running at 2400 Mhz. If you do or don't, put your RAM into different RAM slot and test again. Mark results on paper and do the same with 2nd stick.

In the end, you should have about similar results:
Stick #1 in slot #1 - works at 2133 Mhz; doesn't work at 2400 Mhz.
Stick #1 in slot #2 - works at 2133 Mhz; works at 2400 Mhz.

Stick #2 in slot #1 - works at 2133 Mhz; works at 2400 Mhz.
Stick #2 in slot #2 - works at 2133 Mhz; doesn't work at 2400 Mhz.

Though, after looking supported memory list, it can be seen that none of the 2400 Mhz rated G.Skill RAMs are in that list. What are from G.Skill are either 2133 Mhz or 2666 Mhz and more. It is possible that MSI didn't get any 2400 Mhz rated G.Skill RAMs working at speeds of 2400 Mhz or they just didn't test them on their MoBo (which is strange).
 
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R

raseclog

Commendable
Jul 2, 2017
12
0
1,520


I'll give that a test and let you know of the results. Agreed, I found out this morning that my memory isn't in the 'certified' list of compatible RAM for use with Ryzen. So, I just ordered a pair of 'certified' 8GB 3000 Mhz sticks to test later today as well and if not, return both the RAM and the motherboard as a dud.
 
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R

raseclog

Commendable
Jul 2, 2017
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Okay so I tested each stick individually and they all ran at their rated speed and timings of 2400 mhz 15-15-15-35. I also tested each slot and both worked. However, when putting them together, the speeds went back down to 2133 mhz and timings changed to 15-15-15-36. When I tried to load the A-XMP profile to have them run at their rated speed, the PC ran them. However, upon restarting, the PC restarted 5 times before disabling A-XMP and reverting back to 2133 mhz.
 
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Aeacus

Aeacus

Titan
Ambassador
Mar 21, 2015
11,793
1,662
80,390
Did you buy your RAM as a kit of 2 or both sticks separately? Because when you buy RAM separately then there's 50:50 chance they work together, while with kit set, RAM manufacturer has tested and confirmed that all RAMs in a kit are working together without issues.
 
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Solution
R

raseclog

Commendable
Jul 2, 2017
12
0
1,520


Oh that may be it, I bought them separately. Additionally, the G.Skill Ripjaws V aren't listed as certified right now so that could be another problem. Good thing is, I tried out my new Corsair Vengeance sticks (bought these as pair) and they run perfectly at 2933 MHz without issue. Then again, these are actually listed as certified with Ryzen.

Anyway, thanks a lot, I'll hold on to my G.Skill for an Intel build later down the road.
 
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