Sign in with
Sign up | Sign in
Your question

Can Not get 16GBs of RAM to run @ 1866 on a Gigabyte GA-Z68XP-UD3

Last response: in Motherboards
Share
December 7, 2011 11:13:26 PM

Hello Everyone,

Like the problem states I am having problems running all 16 GBs of ram at 1866 in my newly built system. First off I will list my system specs in case any of it is relevant to the problem.

Intel Core i7-2700K
Gigabyte GA-Z68XP-UD3 F8(NEWEST FIRMWARE)
2X CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 15000) Desktop Memory Model CMZ8GX3M2A1866C9
2X OCZ Vertex 3 130GB SSD
2X Western Digital VelociRaptor WD1500HLFS 150GB 10000 RPM
Asus GTX 480
Creative Sound Blaster X-Fi XtremeGamer Fatal1ty Pro
VisionTek Bigfoot Killer 2100 NIC
Antec TruePower Quattro TPQ-1000 1000W PSU

Like I said previously this is a newly built system. I put this system together for the first time about two weeks ago. In its first iteration it only had 8Gbs of RAM. At first I had problems running that at 1866. I would go into the Bios and load the XMP Profile1 and the system would not boot. It would give me an error about the RAM frequency then default to the 1333 speed. The 8GBs are in 2 4GB sticks. I removed one stick and could get the system to run the one stick at 1866 in all Four RAM slots. I switched the sticks out and could get the other one to run at 1866 in all Four slots. The problem ended up being I had the two in Slots 2 and 4, instead of the recommended 1 and 3. I installed the OS and everything was GRAVY. I was happy with it.

But then I began thinking how much better it would be if I had 16GB of RAM in it. So I ordered another 8GB of the same model of RAM. When it came I installed it in Slots 2 and 4, and didn’t have to change anything in the BIOS, all 4 sticks were running at 1866. At the same point I added the two SSDs to the mix so I had to reinstall the OS. Once the installation was done, came the numerous BSODs. It seemed like every code was different but had something to do with memory. My thinking immediately went to I got a defective stick in this latest batch. So I took the old RAM out and placed the new RAM in 1 and 3 and reinstalled the OS. It is rock solid, with the latest sticks running at 1866. So apparently all 4 sticks work great at 1866 when there are two of them in the system. When I add all 4, that’s when errors pop up in the OS side of things.

The only setting in the Bios that I altered in relation to memory is selecting Profile1 in the XMP part, just that one setting.

I have a feeling, or maybe it is just a hope that this is just some setting I never set in the BIOS that could get this system Jiving. PLEASE HELP!!!
a b V Motherboard
December 8, 2011 1:12:51 AM

Maybe the system does not run slots 2 and 4 dual channel well. It seem that all slots worked UNTIL you did dual channel with slots 2 and 4. That is all I noticed. I don't see anything else. I would just make sure that the voltage on the memory is set correctly. (should be with XMP)

Hope this helps! :) 
m
0
l
December 8, 2011 12:05:46 PM

I did not mess around at all with the timings, just with the voltage.

So I was messing around with the voltage settings for the RAM and seem to have found a happy place. The RAM is supposed to run at 1.50V. I stepped up the voltage, and the OS became rock solid at 1.565V. But Battlefield 3 remained unstable until I reached 1.57V. That is a 4.7% increase over stock/recommended voltage. Here is my question.

How much damage am I doing to the RAM running it at that voltage?

I know there is no concrete answer but a general idea would help. I have not run a CPU or RAM above stock in like 10 years, so I am a little rusty. If it seems to work, would you use those settings? Is it bad to use stock timings and just bump up the voltage?

Here is my second little beef. When I first installed my system two weeks ago and only had 8GBs of RAM running at 1866, my Win 7 System rating was a 7.7 for my Ram, and 7.7 for my i7 2700K CPU. Now that I added the SSDs and now have 16GB @ 1866 my system is reading differently. The RAM is at 7.7. But to my DISMAY my i7 2700K is rated at 7.2.

So my question is does anyone know why Win 7 would report an i7 2700K @ 7.2?

Do you know how I can get it to at least report it at the 7.7 it originally rated it at?
m
0
l
Related resources
a c 156 V Motherboard
December 8, 2011 12:20:26 PM

The 1.50 volt spec for the RAM is primarily for the memory controller inside the CPU, not the RAM chips. Max voltage for DDR3 RAM considered to be 1.65 volts. But I would not run that high with an SB CPU.

More better you run your RAM at DDR3-1600 at 1.50 volts. It's easier on your CPU and it would take a very good benchmark to measure the performance difference between -1600 and -1866 speeds.

About the Win7 System rating: I do not think that many of the regulars here pay much attention to that.
m
0
l
December 8, 2011 12:34:19 PM

jsc said:
The 1.50 volt spec for the RAM is primarily for the memory controller inside the CPU, not the RAM chips. Max voltage for DDR3 RAM considered to be 1.65 volts. But I would not run that high with an SB CPU.

More better you run your RAM at DDR3-1600 at 1.50 volts. It's easier on your CPU and it would take a very good benchmark to measure the performance difference between -1600 and -1866 speeds.

About the Win7 System rating: I do not think that many of the regulars here pay much attention to that.


Thank You for your advice. I will put the system rating out of my mind. You mentioned about the complexity of a benchmark to rate the difference in 1600 & 1866 speeds.

So here is my question to you. Would you or I be able to tell the difference in the overall speed of the computer between the two? For lets say playing Battlefield 2 or loading maps?
m
0
l
a c 156 V Motherboard
December 8, 2011 1:25:19 PM

No. Differences in RAM speeds and timing (Intel CPU's) don't have much effect on overal system performance. Oh, sure. You could do something terribly suboptimal, but you would need to work at it.
m
0
l
a b V Motherboard
December 8, 2011 1:53:58 PM

I wouldn't think 1.57v would be bad. I run my Patriot memory @ 1.65v with my Core i5 2500K CPU and it is rock solid. But, 1600mhz to 1866mhz, you won't see the difference. But, if you can find a way to run it @ 1866, that would be better.
m
0
l
!