Memory overclock

redfist · 16 Jan 2011 at 21:24

I tired to ask this in the overclocking forum but there was no answer, as this relates to memory i thought i would try here.

I've overclocked using the auto function on my motherboard and looking at CPU-Z it says that the "Uncore Frequency" is 2250.2 MHz. so does this mean my memory is running this high? also the voltage level for the memory is 1.650 Volts is this to high? (i've pasted part of the CPU-Z report below)

Thanks

Chipset
-------------------------------------------------------------------------
Memory Type DDR3
Memory Size 4096 MBytes
Channels Dual, (Unganged)
Memory Frequency 600.0 MHz (3:8)
CAS# latency (CL) 8.0
RAS# to CAS# delay (tRCD) 8
RAS# Precharge (tRP) 8
Cycle Time (tRAS) 20
Bank Cycle Time (tRC) 27
Command Rate (CR) 1T
Uncore Frequency 2250.2 MHz

Memory SPD
-------------------------------------------------------------------------
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number CMX4GX3M2A1600C9
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-23 @ 444 MHz
JEDEC #2 8.0-8-8-22-30 @ 592 MHz
JEDEC #3 9.0-9-9-24-34 @ 666 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-6-6-16-27-2T @ 533 MHz (1.650 Volts)
XMP #2 9.0-9-9-24-41-2T @ 800 MHz (1.650 Volts)

Stryda09 · 16 Jan 2011 at 22:43

Not 100% sure but uncore is the clock speed of non main cpu units. So I think it is the northbridge frequency that CPUz means. Northbridge controls the memory so a higher clock will increase performance but I think it can also can instability at higher clocks but 2250 should be ok. It says your memory frequency is 600MHz so it is running at 1200MHz as memory can perform two cycles per clock. Your sig doesn't show your memory so I am not sure what speed and voltage it is meant to be set at for default, there are lots of ram sets called Corsair XMS3 so it could be anything. A link to what you bought will help.

I am not the best person to answer but this should help a bit.

redfist · 17 Jan 2011 at 20:02

The memory is Corsair XMS3 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit

Thanks, soon as you said north bridge i now know what this is!

I've been running this for over a week now and everything is stable so fingers crosssed I'm not harming anything.

Jamiman · 18 Jan 2011 at 16:37

thing is, from what i can see, you're running 1600mhz ram at 1200mhz.

why not run it at 1600mhz?

redfist · 20 Jan 2011 at 22:25

Didn't realise that, is it easy to overclock the ram? (i'll need to check the overclocking guide)

Stryda09 · 20 Jan 2011 at 23:15

Well you won't be overclocking it really as it is sold to run at 1600MHz. If you go into BIOS and into where you adjust system frequencies there should be an option called DRAM Frequency. Set this to 1600MHz and then save and restart.

redfist · 21 Jan 2011 at 20:19

Right i've changed the DRAM Frequency to 1500mhz as it was this or 1200,1500 or 2000mhz.

In CPUZ its saying 750mhz at a FSB : DRAM of 3:10.

Everything is stable so i'm not sure if l should try the 2000mhz setting? would this do any damage to my ram?