Can't get RAM to run @ 1866 (Sabertooth Z77)

[branden_lucero]

i received some Ballistix Tactical Tracer in the mail today (4GBx2x2) and i can't get them to run at their profile speed with X.M.P. i started selecting in small increments and each one posted @ 1600, 1800, but as soon as i select 1866 with all the timings and voltage automatically applied, it wont post and will continue to turn on and off before i have to reset the memory again. clearing CMOS and redoing steps changed nothing. RAM is compatible according to Crucial's website.

 

[Dark Lord of Tech]

Specs?

 

[branden_lucero]

3770K

was originally using geil black dragon @ 1600 (8GBx4), for about 4 years but recently decided to make stuff look more aesthetically presentable, so i wanted my PC to look more blue-oriented in the lights. and downsized the amount of RAM in the process.

 

[rgd1101]

You get 2 set of 4GBx2 instead of 4GBx4?

 

[branden_lucero]

didnt have a reason for 32GB anymore.

 

[rgd1101]

didnt have a reason for 32GB anymore.

nope. they are both 16GB.
2 set of 4GBx2 = 16
4GBx4 = 16

 

[burgessanthony]

As I found out, ivy bridge with RAM over 1600 is not garanteed. I tried xmp 2400 didn't work.2133 didn't work. Only very specific manual timings and increased ram voltage ans mem controller could I get 2000. Xmp doesnt mean it will work!

 

[branden_lucero]

didnt have a reason for 32GB anymore.

nope. they are both 16GB.
2 set of 4GBx2 = 16
4GBx4 = 16

because Crucial doesnt sell a set of 4GBx4 with these modules especially with these timings, otherwise i would have. you can buy them in singles or doubles but not in quad. and i cant opt for RAM that have bigger heat spreaders because the CPU cooler clearance wont allow it.

 

[Tradesman1]

What CPU? Need one that can run 4 sticks of 1866, generally a K model or a strong i5 or i7. Also no guarantees when mixing set s of DRAM even of the same exact model - the sticks that go into a package are tested to play nice. A 4 stick set often costs more than two sets of two sticks as it takes more testing to find four that all play nice. With the CPU we might be able to come up with some adjustments to voltages and timings to get them to play

 

[branden_lucero]

its a 3770K running at stock. i used to have it at 4.3GHz when i had my water loop. but i've since went back to a CPU cooler - running at stock with the turbo left on default. the only thing i didnt do is try the sticks one at a time, and then together as a pair separately. but i can't do that till tomorrow if that's a diagnosis to make, PC is at another house. its just going to be a pain because one of the sticks is right underneath the cooler so taking it out would be having to take out the heatsink (annoying every time).

also the XMP profile for the RAM is set at 9-9-9-27 @ 1.5v since i didnt mention it earlier.

 

[branden_lucero]

so i started doing this by taking out and putting sticks into different slots.

slots 1 and 3 run fine at xmp
slots 1, 2, 3 run fine at xmp
slots 1, 2, 3, 4 will not post

took the stick out of slot 4 and put it in slot 2: posts just fine
slots 1, 2, and 4 post just fine.
slots 1, 3, and 4 post just fine.

it seems that if i add a 4th stick, it will not post, but it'll post just fine with 3 sticks installed. all the ram slots work fine and all the memory sticks are fine.

 

[Tradesman1]

Could try adding the fourth stick and raise the DRAM voltage about + 0.05 and might lift the MC (memory controller voltage (think it's DDRVTT or CPUVTT on your mobo)