6GB OCZ + 12GB Corsair unstable

Hello there,

 

I've had a system running for ~4-5 years with these components:

- OCZ3RPR2000LV6GK (triple channel 3x2GB DDR3 2000MHz 9-9-9-30).

- ASUS Rampage II Extreme motherboard (original BIOS, bought it when it was just new).

- I7 930 (2.8GHz).

- 620W PSU.

 

BIOS settings:

- Timings (from BIOS):

Info 1: 9-9-9-24-7-98-14-9-28-0 (AUTO)

Info 2: 2N-62-65-67 (AUTO)

Info 3: 6-6-19-10-10-10-7-6-4-7-7-4 (AUTO)

- AI overclock tuner: MANUAL

- OC from memory level up: 2000MHz

- CPU ratio setting: 20.0

- CPU turbo power limit: Enabled

- BCLK freq: 160

- PCIE freq: 100

- DRAM freq: DDR3-1925MHz

- DRAM Bus voltage: 1.65681

- CPU voltage: 1.25

- CPU PLL voltage: 1.81592

- QPI/DRAM CORE voltage: 1.65 (Seems a bit high to me now, but runs for ~4-5 years already..)

- IOH voltage: 1.24591

- IOH PCIE voltage: 1.51106

- IOH voltage: 1.11341

- IOH PCIE voltage: 1.51106

 

Because my RAM was often pushing to 6GB usage, I've decided to expand my RAM with another 12GB of RAM. So I bought the cmt12gx3m3a2000c9 (triple channel, 3x4GB DDR3 2000MHz 9-10-9-27) to increase my RAM to 18GB. When using ONLY the 12GB corsair RAM, the RAM is stable at 1925MHz with these timings:

Info1: 9-9-9-24-6-128-12-8-24-0

Info2: 1N-60-62-65

Info3: 6-6-18-10-10-10-7-6-4-7-7-4 (AUTO)

 

Now the thing which I don't understand; When I put both the OCZ 6GB and Corsair 12GB memory in the system, depending on the BIOS settings, sometimes only 6GB shows up in windows task manager, sometimes that's 12GB and sometimes 18GB. I have tried running the RAM at 1.7V with 10-10-10-30 timings, default CPU clocks (but still the same voltages) at 1720MHz and it still fails a memtest after ~2-5 minutes (computer just powers off).

 

In an attempt to stabilize the 18GB of RAM, I've tried my CPU OC to 3.2GHz, RAM freq to 1604MHz @ 1.65V and timings:

Info1: 9-10-9-30-7-128-15-9-28-0

Info2: 3N-59-61-64 (Only manually set the 3N)

Info3: 6-6-18-10-10-10-7-6-4-7-7-4 (AUTO)

This setup ran 'stable' (10 mins test, no fail).

 

I've read X.M.P. could be useful to enable, but when I put my AI Overclock Tuner from Manual to X.M.P., it shows an Enable X.M.P. [Disabled] which I can not change. I think my system might be failing because the advanced timings (Everything other than 9-10-9-30) might be incorrect.

 

My question is why I can get the modules to work at 1925MHz when using only one set, and not higher than 1604MHz (the next step was 1925MHz) when using both.

 

I hope someone can give me some fresh insights in this.

 

Meow,,

Pieter

combining ram is not suggested, recommended or supported even if you bought 2 kits of Corsair.

mixing 2 different brands on the other hand is even more likely to be unstable (as you have seen)

also your CPU has a listed max speed of 1600, i know it can do better however the memory controller on the CPU is very confused right now. it is receiving instructions from two very different IC chips on the rams and cant make up its mind which set to listen to.

 

there is no fix for this issue im sorry to say.

combining ram is not suggested, recommended or supported even if you bought 2 kits of Corsair.

mixing 2 different brands on the other hand is even more likely to be unstable (as you have seen)

also your CPU has a listed max speed of 1600, i know it can do better however the memory controller on the CPU is very confused right now. it is receiving instructions from two very different IC chips on the rams and cant make up its mind which set to listen to.

 

there is no fix for this issue im sorry to say.

 

Thanks for your reply, that's too bad to hear. As the 18GB seems to run stable at ~1200MHz and fails a memtest after ~30-45 mins on 1604MHz, I'm wondering if I could change something to add a bit more stability (though 100% stable might not happen if you are right). In case it helps: I had my CPU running at 4.5GHz for a while, I downclocked it after a few months as I figured I didn't need it. Perhaps that could mean the CPU should be able to handle the speed.

 

Also, what is the difference between 1N, 2N and 3N in the memory timings (and what should I set it to)?

 

Meow,,

Pieter

Id just use the 12gb set,this is plenty for most every task...

2n will be way more stable

Hi, I am considering doing the same, I am looking at 12GB kit Corsair CMZ12GX3M3A1600C9 12GB (3 x 4GB) DDR3 Vengeance Memory to complement my current system that is OCZ3rpr1866c9lv6gk 6 GB did you have any luck running a stable system? I don't overclock much my i7 920 is running at 3GHz I got it up to 4GHz but its too hot for air cooling so I prefer to keep it at a lower clock, my motherboard is GA-EX58-UD4P TIA

For most things 12GB RAM with that type of speed will suffice.

I have to say... just bougth two kits of this memory to max out my aging X58 2009 system and give it a good departure. but the performance is worse than with OCZ 1500. I am very surprised that the system is significantly slower.

 

 

Starting to miss my old OCZ

 

Im also upgrading the CPU for a Xeon W3690 to maxout my X58 system. Looking to build a new system with Zen 2 in the summer.

 

Any luck performing a simple overclock on the system.