Help: Memory Timings and Voltage on P8P67 pro


I've got the following system:

Asus P8p67 pro rev b
i5 2500 non K
3 x 4gb patriot Patriot Viper II Sector 7 DDR3 1600 (PC3 12800)
gtx 660 (recently added)

so I had a fairly stable rig for the last 2 years. the guy at the shop where I bought my setup from was very helpful and setup everything to run a bit OC. I've never had too much trouble and what problems I had I solved with my limited knowledge of bios and hardware. In the process I might have reset BIOS to defaults, but that was about a year ago.

Recently I've been experiencing random freezes and I started looking into bios. BCLK of my i5 was set to 103mhz. I reverted it to 100mhz and set the RAM to 1600mhz via XMP. This caused some further instability and I read somewhere that the sandy bridge setup doesn't like 1.65v which is what the RAM used for XMP profile.

I've now changed the settings again, to 1333mhz, cpu-z is showing

666 MHZ @ 8-9-8-24 and gives me a FSB : DRAM 1:5

What I would like is to run the ram @ 1333mhz 1.5v and correct timings.

I know very little about timings and hence not sure whether these are correct for my setup. The RAM in question is this one

also goes by pv7312g1600elk

problem is it's end-of-life now, so I can't find any documentation about it.

Relevant Screenshots here:

Can anybody help or advise?
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