Added two new identical RAM Sticks - PC Wont Boot (It seems)

TammerG

Commendable
Nov 12, 2016
2
0
1,510
Hey all! I have done some searching and tried alot of things, which I will list below, but let me give you a quick rundown of my issue. I have 16gb of RAM and thought it would be nice to add another 16gb because i love ramping up the PC if only by a bit. The two new RAM sticks i purchased are identical to the two i have running now, but when i add the new two to the C_1 and D_1 slot of my MOBO, none of my monitors seem to respond to boot whatsoever, yet the PC will stay on as long as you let it run. Here is my rig.

Mobo: ASRock X99X Fatal1ty
CPU: i7 5930K @3.5GHZ
GPU: MSI GTX1080
Memory: G.SKILL TridentZ Series 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600)
Storage: Samsung 850 EVO 120GB x 1 Samsung 850 EVO 500GB x 2
PSU: EVGA 850 Gold

I have tried to do the things i am aware of trying and what i have read about. I have gone and reset my CMOS battery, used the actual button on the mobo to clear the CMOS values. Reset the mobo to its default settings. Basically, it works with my two RAM sticks in A_1 and B_1, but when adding C_1 and D_1 i get no picture on my mointors. Sorry if this is too wordy...thanks so much for any help you can give.
 
Solution
Hi TammerG:)

Test each kit separately in A1 and B1 slots to eliminated the possibility of a DIMM failure.

It is not a good idea to mix DIMM kits even of the same spec. Reason being that the manufacturing process produces slight variations and they are binned in house to match modules.
Very often you can get them to work together with Bios intervention, if you know what you are doing.
Please read this informative article: https://rog.asus.com/forum/showthread.php?57038-Don%92t-combine-memory-kits!-The-meat-and-potatoes-overview

As you can see it can be a hit and miss affair with no guarantee of success.
I would also check your Bios version and update to latest if not already done so.
Your performance will not increase by adding extra...
Hi TammerG:)

Test each kit separately in A1 and B1 slots to eliminated the possibility of a DIMM failure.

It is not a good idea to mix DIMM kits even of the same spec. Reason being that the manufacturing process produces slight variations and they are binned in house to match modules.
Very often you can get them to work together with Bios intervention, if you know what you are doing.
Please read this informative article: https://rog.asus.com/forum/showthread.php?57038-Don%92t-combine-memory-kits!-The-meat-and-potatoes-overview

As you can see it can be a hit and miss affair with no guarantee of success.
I would also check your Bios version and update to latest if not already done so.
Your performance will not increase by adding extra RAM and 3200MHz with 32MB is quite a strain on the CPU IMC, Even though the MB may support higher frequency DIMMs.
 
Solution

TammerG

Commendable
Nov 12, 2016
2
0
1,510


Hey!

Thanks so much for your response, it had never occurred to me that more RAM could actually have an adverse impact on performance on the CPU. Thank you for your insight, and into the article you provided. I can now appreciate buying as a kit! So with my setup, you think everything is fine and dandy with no need for RAM increase?