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Vengeance 16GB only runs at 1066 on Asus Sabertooth Z77, i7-2600k

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Memory: CMZ16GX3M2a1600C10
MB: Asus Sabertooth Z77, latest bios 0906
Chip: i7-2600k

On post I get a red light by the memory. I'm able to hold for the board to auto set. It sets to 1066MHz. Under Ai Tweaker I've tried everything to get it above 1066 but nothing works. After each save I get red light again.

Changing Memory Frequency to DDR3-1333MHZ fails.
Changing Memory Frequency to DDR3-1600MHZ fails.
Setting Ai Overclock Tuner to X.M.P. and selecting profile 1 fails.
Note there is only one profile to select, nothing more. The settings for profile 1 are
10-10-10-27-2N-1.50V-1.20V

Any suggestions on what to try next? From reading it looks like I need to change some voltage settings but I'm not sure what should be changed. I have tried bumping up the DRAM Voltage (tried 1.6 and 1.65) but both of these fail at 1333 and 1600.

More about : vengeance 16gb runs 1066 asus sabertooth z77 2600k

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Memory Authority
Motherboard Authority

Setting the XMP profile is usually all that you need to do. Asus boards historically have pretty poor DRAM support out of the box but it is improved over time with firmware updates
Motherboard Expert

The motherboard might not support it , have a look in the manual under the QVL and see if your ram is in the list, Asus usually does update their bios for more ram comatibility.
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Memory Master
Motherboard Master

sugarcrum said:
Memory: CMZ16GX3M2a1600C10
MB: Asus Sabertooth Z77, latest bios 0906
Chip: i7-2600k

On post I get a red light by the memory. I'm able to hold for the board to auto set. It sets to 1066MHz. Under Ai Tweaker I've tried everything to get it above 1066 but nothing works. After each save I get red light again.

Changing Memory Frequency to DDR3-1333MHZ fails.
Changing Memory Frequency to DDR3-1600MHZ fails.
Setting Ai Overclock Tuner to X.M.P. and selecting profile 1 fails.
Note there is only one profile to select, nothing more. The settings for profile 1 are
10-10-10-27-2N-1.50V-1.20V

Any suggestions on what to try next? From reading it looks like I need to change some voltage settings but I'm not sure what should be changed. I have tried bumping up the DRAM Voltage (tried 1.6 and 1.65) but both of these fail at 1333 and 1600.

Try it with one RAM stick.

I've tried all that.

* Reset BIOS. Same results. I have to have it auto set memory back to 1066 to work.

* Reset BIOS again; I pulled one stick out; boot with a single stick. This worked at 1600MHz with no problem. Woo-hoo. I ran memtest on this single stick. No problems.

* Reset BIOS again; I pulled this stick out and replaced with the other stick. Same, it worked fine at 1600MHz with no problems. Memtest passed also on this one.

* I then put in the other stick; back to error and back to 1066 for them to work together.

I'm at a loss and aggravated to say the least. I appreciate the reply, thanks.
Motherboard Expert

Have you tried using the other slots?
Are you running them installed in paralell?
First run both sticks of ram in the B slots,both the lighter coloured slots
If that fails then try both A slots,both the darker coloured slots.

The problem could be your ram is not in the QVL and is not fully compatible.

Ive got the same problem with 4x4GB RAM.
Tried all the things mentioned above. Memtest passed fine.
My problem occured after i installed new CPU cooler.
But what i found out was that, when plugged in just A ram sockets - worked fine with 1600MHz, but when i inserted RAM to B sockets PC start failed. When i plugged in just 1 RAM into B socket - worked fine.
So its a dual channel problem ?

Found a solution to that problem...
You cant use that fan on sabertooth, cause the coolers backplate shortcircuits soldered connections at back of the motherboards and causes that defect.
Works fine with stock cooler.
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