F3-17000CL11D-8GBXL + Asus F2A85-M Pro + AMD A10-6800K

[Ruoruni]

Ram: G.Skill F3-17000CL11D-8GBXL
Motherboard: Asus F2A85-M Pro
CPU: AMD A10-6800K

I am trying to optimize my RAM in the system noted above. The product says 2133 @ 11-11-11-30

CPU-Z reads the following XMP timings:

XMP profile   XMP-2134
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 11.0-11-11-31-43-2T @ 1120 MHz (1.600 Volts)

XMP profile XMP-2132
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 11.0-11-11-31-42-1T @ 1100 MHz (1.600 Volts)

The BIOS allows me to pick D.O.C.P. and reads the two profiles. The second profile fails BIOS tests but the first allows me to boot into Windows. However, when I run CPU-Z it shows:

Chipset
-------------------------------------------------------------------------

Northbridge AMD A55/A60M FCH rev. 00
Southbridge AMD A55/A60M rev. 11
Graphic Interface PCI-Express
PCI-E Link Width x0
PCI-E Max Link Width x0
Memory Type DDR3
Memory Size 8 GBytes
Channels Dual
Memory Frequency 1066.7 MHz (3:32)
CAS# latency (CL) 11.0
RAS# to CAS# delay (tRCD) 11
RAS# Precharge (tRP) 11
Cycle Time (tRAS) 30
Bank Cycle Time (tRC) 32
Uncore Frequency 1500.0 MHz

ASUS Suite II reports RAM voltage at 1.6V.

I'm confused.
Where is the 2134 MHz? I've read that you must multiply the CPU-Z reported frequency times 2. This suggests that I am actually running at 2134 MHz. Why does the CPU-Z reported frequency need multiplied by two? Is this value set somewhere or just an algorithm error in CPU-Z?
Why doesn't the 1T profile work?
Why do the profiles show tRAS = 31 but it is reported at 30?
I also ran Prime95 for a wee bit with no errors. I've had faulty RAM in other systems that has failed after seconds.

[GSKILL TECH]

It is not 2134MHz, it is DDR3-2134 or XMP-2134

Memory Frequency 1066.7 MHz * 2 = ~DDR3-2133

It's not an error, when you see MHz, that is the real bus frequency. When you see DDR3-xxxx, that is the effective frequency.

1T/2T depends on your CPU

With DOCP enabled, don't forget to raise CPU-NB Voltage +0.1V to stabilize the CPU memory controller

CPU-z and BIOS can read the timings slightly differently, but don't worry it is fine.

Thank you
GSKILL TECH

[Ruoruni]

Is there a quantified CPU-NB voltage?

I'm looking at TurboV EVO and it shows CPU voltage set to 1.26250 and VDDNB Voltage set to 1.16250. From what I've read it seems that VDDNB = CPU-NB voltage. So should I bump this up to 1.26250 to match CPU voltage?

Also, does running RAM at D.O.C.P. settings reduce its life span? I'm guessing not because it is sold at these settings with a lifetime warranty...

Which raises what is hopefully my last question - I've read differing opinions on this - is there any benefit to a RAM cooler (e.g. fans that mount over RAM)?

[Tradesman]

If the DRAM is unstable can raise the VDDNB some, I'd prob go maybe 1.2 to start if needed - they don't need to be the same.

No, it won't reduce the lifespan the sticks are specced at their given freq and do indeed have a lifetime warranty

There can be but generally no need unless the case is poorly ventilated or you just get a lot of heat off the chipsets or CPUs