ndAsrock 970 PRO3 R2.0 a Crucial Dimms not working
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=8461
Printed Date: 19 Jul 2025 at 6:53am
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Topic: ndAsrock 970 PRO3 R2.0 a Crucial Dimms not working
Posted By: Alpha981
Subject: ndAsrock 970 PRO3 R2.0 a Crucial Dimms not working
Date Posted: 21 Apr 2018 at 8:08pm
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" rel="nofollow - Hellol at Asrockforum I have the following Asrock 970 PRO3 R2.0 motherboard with a AMD FX8350cpu and wanted to update the current memory I had 8gb with each slot having 2gb in I read the Tech specs and see that the motherboard supported upto 64gb to I thought I would by the following memory Crucial 16GB Kit (8GBx2) DDR3L 1866 MT/s (PC3L-14900) UDIMM 240-Pin So I bought 2 kits so that I could add them to the 4 slots giving me 32gb of memory However on installing the memory in the 4 slots i just get a black screen of bootup if I remove the two middle memory chips the computer will bootup without problems I can however add 2 of my old Memory chips in the middle slots giving me a total of 20gb I thought that the other memory chips were faulty, but I have swooped them out and they will only work in the 2 outer slots. is there anyway I can add the Crucial memory to the middle slots? Thanks for any advice in advance |
Replies:
Posted By: datonyb
Date Posted: 21 Apr 2018 at 8:11pm
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it sounds like the cpu's memory controller cant handle all 32gb (4 sticks at 1866mhz) try installing 2 sticks set speed to 1600 mhz and then install the other 2 sticks ------------- [url=https://valid.x86.fr/jpg250]  [/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
Posted By: cristy6100
Date Posted: 21 Apr 2018 at 9:15pm
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Increase the DRAM voltage to 1.50V, Piledriver doesn't pair well with DDR3L (1.35V DDR3 memory) and this is much more true when you populate all 4 slots, so enter UEFI with only 2 sticks set memory to 1600MHz as said above, but set memory voltage to 1.50V also if still no boot with 4 sticks, increase memory voltage to 1.55V and report back Also you can try increasing the CPU/NB voltage to 1.20V up to 1.25V and see if it helps ------------- Main Rig: AMD Ryzen 2400G | ASRock Fatality X370 ITX/ac UEFI 4.90 | Corsair LPX DDR4 2400@3200 1.35V | Corsair RM650i PSU | CM ML120L AiO Cooler |
Posted By: Alpha981
Date Posted: 21 Apr 2018 at 9:51pm
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Hello datonyb and cristy6100 I first tried the idea from datonyb but this didnt seem to do the trick I was just about to write a Reply in the Forum when I got a Reply from cristy6100. I also tried your idea to chanage the memory voltage to 1.50V this I did and also left it at 1600MHz. And the result is that it  Worked.So a Kind thankyou to datonyb und cristy6100 |
Posted By: cristy6100
Date Posted: 21 Apr 2018 at 11:05pm
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If you want you can try to set 1866MHz now and see if it works, it should, because FX 8350 can work with 2133-2400MHz memory with 2 slots, it should do 1866MHz with all 4 slots populated. If 1866MHz with 1.50 wont boot, try 1.55V max because the memory might not like more than 1.55V, the FX series CPU's can take DRAM voltages up to 1.65V with no problems, but I don't know about the memory. Or leave it at 1600 with 1.50, the difference on the AM3 platform between 1600 and 1866MHz is about 2-3GB/s bandwidth Have a nice day
------------- Main Rig: AMD Ryzen 2400G | ASRock Fatality X370 ITX/ac UEFI 4.90 | Corsair LPX DDR4 2400@3200 1.35V | Corsair RM650i PSU | CM ML120L AiO Cooler |
Posted By: Alpha981
Date Posted: 22 Apr 2018 at 2:06am
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" rel="nofollow - Hey cristy6100 Tried your Suggestion and set it back to 1866MHz And it also worked with 4 populated slots. I also tried 1.55V but it didn?™t boot, so I?™ve set it back And it?™s booting again. So thanks for your help and time Just need to find a better CPU Fan, as the one that came With the FX 8350 is way to loud |
Posted By: cristy6100
Date Posted: 22 Apr 2018 at 5:04am
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" rel="nofollow - So its not working with all 4 dimms populated if you set 1866MHz and 1.55V? Its strange normally it should, I can suggest keeping 1.55V max for memory and set 1866MHz for memory but also change CPU/NB to 1.20V and check if it works, if it does not, leave it at 1.50V with 1600MHz, because more voltage is not worth the increase in bandwidth, FX CPU's are not really limited by the memory, but by the CPU cores themselves. Regarding the CPU fan, if your FX8350 came with a heatsink with 4 copper heatpipes and copper base its one of the best stock heatsinks, the fan is loud indeed, its a Delta fan rated up to 3700RPM if I remember right. I can suggest lowering the RPM in UEFI by setting the CPU fan profile to quiet, or if you desire a AIO like the Corsair H60 (the 2018 model, not the older 2 models) or a even cheaper Cooler Master ML120L, I have both and I would recommend the Cooler Master one, but on the AM3 platform a little airflow on the motherboards should be provided if you lower the stock CPU fan RPM or use and AIO, so make sure you have at least a fan for intake that blows towards the northbridge and southbridge for best long term reliability Cheers :)
------------- Main Rig: AMD Ryzen 2400G | ASRock Fatality X370 ITX/ac UEFI 4.90 | Corsair LPX DDR4 2400@3200 1.35V | Corsair RM650i PSU | CM ML120L AiO Cooler |
Posted By: Alpha981
Date Posted: 22 Apr 2018 at 4:27pm
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Hello Thanks for the Reply I have left the Memory at 1.50V with 1600MHz as it working fine As for the stock fan you are right it is the same one that you describe I have set the CPU Fan Profile to quiet and it is a lot quieter than what it was  I will however look into your Fan Suggestion I have a Sharkoon DG7000 PC Case so i have extra fans to Keep the 970 PRO3 cool and both will also fit Thanks |
Posted By: PetrolHead
Date Posted: 23 Apr 2018 at 4:04pm
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Glad this was sorted. A few notes as a reminder: -If you intend to populate or four slots, you should always buy a four module kit instead of two kits with two modules. Separate kits are not guaranteed to work together, not even if it's the same memory. I would also assume that if two different kits do work together, they may not be as easy to overclock as one single kit. This is difficult to confirm, however, since overclocking potential always depends on the kit itself. I'm not sure if anyone has ever done any statistical comparison of these two cases. -The maximum stock RAM speed for FX-processors is 1866 MHz only when the motherboard has two memory slots and they are both populated. If there are four memory slots of which two are populated, the maximum stock speed is 1600 MHz. The same is true if all four memory slots are populated with single rank memory. However, if all four slots are populated with dual rank memory or a mix of single and dual rank memory, the maximum stock RAM speed is 1333 MHz. Reaching speeds higher than these are of course possible, but it's not guaranteed. So, two rule of tumbs for future reference: 1. Always buy a single RAM kit, if possible. 2. Always go for two modules instead of four, if possible. ------------- Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit |