System freezing since installing additional RAM, utilising all 4 banks

[Gimpymoo]

I recently installed some additional RAM upgrading from:

2 x 1GB DDR3 Dual Channel OCZ Platinum - http://www.ocztechnology.com/products/memory/ocz_ddr3_pc3_10666_platinum_edition

to

2 x 1GB DDR3 Dual Channel OCZ Platinum (1.8v) - http://www.ocztechnology.com/products/memory/ocz_ddr3_pc3_10666_platinum_edition
2 x 2GB DDR3 Dual Channel OCZ Gold (1.7v) - http://www.ocztechnology.com/products/memory/ocz_ddr3_pc3_10666_gold_edition

This coincided with a PSU change as well owing to the other one giving up the will to live.

ALL Ram modules have passed an extensive RAM test without issue.

Now that all 4 banks are being used, is it possible a minor tweak to the DDR3 voltage maybe needed to power all 4 sticks?

The board is a Gigabyte GA-MA790XT-UD4P and I have just this moment upgraded from BIOS version F8e to F8f.

Could not enough juice to the ram cause a complete system lock?

EDIT:

I tried increasing the DDR voltage to 1.8, still the same freeze.

Increased the NB voltage, testing now.

Failing the above, will remove the 2 x 1GB modules.

Still the same issue.

EDIT 2:

Have removed the 2 x 1GB Modules. They did seem warm to the touch.

Thanks.

 

[AMG]

it might be they are two different rated modules

its fine for some mobos but not others, like mine for example what happens with only the 1Gb sticks installed ?

 

[NAM_killer]

You should really keep to the same modules..

Try using 4x ocz gold

 

[Gimpymoo]

Makes sense, the Platinum is CL 7-7-7-20 and the Gold is CL 9-9-9-20.

Will see if can manually adjust the timings on the Platinum modules although I dont think my mainboard allows that.

I guess that is the advantage of a "premium" mainboard I guess.