Suspect RAM Timing Issues

[Exsivix]

So I bought a second hand Asus Sabertooth Z77, in good nic.

My problem is when i insert my two RAM sticks into the correct DIMMS (According to the colour of the DIMM slots) my machine will start up for about 10 second without displaying any image, then it will restart and run constanly also without displaying an image, but to turn it off i need to hold the power button down for a fec seconds, just pressing it once or twice will not turn it off.

But when i put the RAM sticks right next to each other (incorrect DIMMS) it will work perfectly fine, no troubles. (Would make a slight impact in peformance though)
 

This started happening as soon as i finished the build. At the time of finishing the build, i was using crappy generic RAM (2x4GB Amicroe sticks) Even after upgrading to G.Skill Sniper F3-12800CL9D-8GBSR 8GB (2x4GB) DDR3, the problem is still there. I was running a Core i5 3570 at the time and now i am using a 2500K now and the problem is still there.

 

I have tried re-setting the bios and all the usual things, im guessing the problem lies deeper, maybe timing or something. I also tried running it with no HDD's or USB headers or anything plugged in, still no go.

 

Any help will be greatly appreciated.

Specs:

i5 2500K @ 4.0GHz

F3-12800CL9D-8GBSR 8GB (2x4GB) DDR3

Asus Sabertooth Z77

Galax GTX 970 EX OC Black edition

Corsair C70

WD Black 1TB

 

Cheers

[Levent]

timing in this case feels unrelated but try increasing IMC and dram voltage a lil and see if it helps

[rhyseyness]

Could be a dead DIMM slot.

Try the other two slots which are colour coordinated.

i.e. try slots 2 & 4 rather than 1 & 3.

Hope this helps

[Exsivix]

Thanks guys Yeah forgot to mention, I have tried the same combination on the other "bank" of DIMM's (the other side) and it does the same thing, all the DIMM's work fine as far as I can tell.