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Whats wrong with my memory?

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October 17, 2009 7:52:26 PM

I have 8 gigs of OCZ ddr3 1600 pc3 12800 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Ive been wondering why mines been running at pc3 8500. How do i change this to 12800, and i guess by this i mean how do i change the timings. Will there be a perf increase if i change the timings to 8-8-8-24? For full system specs check my member config, and now some pictures:







More about : whats wrong memory

October 17, 2009 8:06:44 PM

hi
you have to go into the bios and make the changes..

from the specs of your ram you'd want to set it to 8-8-8-24
Voltage 1.65V

the ram should run at the specs it made for ...i think once you make the changes to the timings and voltage it will run at the rated speed
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October 17, 2009 8:18:06 PM

pont said:
hi
you have to go into the bios and make the changes..

from the specs of your ram you'd want to set it to 8-8-8-24
Voltage 1.65V

the ram should run at the specs it made for ...i think once you make the changes to the timings and voltage it will run at the rated speed


Ok but what settings do i change to make the clocks what is stated above, there is at least 20 options.
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October 17, 2009 10:58:09 PM

first i need to know the mother board you are using so i can look and see were you need to go and change the settings

on my board gigabyte ma785-ud3h i change the ram timimgs at this location in the bios


pic from online manual
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October 17, 2009 11:02:14 PM

and you'd need to look at your ram and see what is printed on the sticker and but those timings and set the voltage to the correct settings
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a b } Memory
October 18, 2009 3:58:38 PM

Just to add to what's currently visible, you're currently running at 1333 according to your post. The clock is doubled from the readings in Cpu-z, where it says pc2 8500 is just the default startup settings for compatibility. On the previous page (memory) that displays the current settings of 666.7, double that you have 1333. To achieve the higher setting of 1600 voltage must be set to 1.65 which is the manufacturers specification. The 1.5 v setting currently used is standard voltage for ddr3 chips. In your bios prior to the ddrii timings sheet you should see a ram setting for EPP which refers to enhanced performance profile on gigabyte boards. Enable Epp mode for clock speed, right beneath that should be Epp voltage enable this also. You must enable the EPP voltage setting or you probobly won't be able to post on next boot after setting. Run Cpu-z again and click memory, you should see 800mhz, which doubled is 1600. You may need to type in ctrl F1 to reach enhanced bios screen settings once you come up into the initial bios screen. Good luck
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October 18, 2009 6:38:24 PM

For the one who asked for my mobo its an MSI 790FX GD70. And is the pc3 8500 and pc3 12800 related to bandwidth in any way?
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October 18, 2009 8:04:06 PM

its related to bandwidth as bandwidth is directly determined by mhz(speed)

what are you stuck on I think he described what you needed to do fairly well?

your chips were rated to run 8-8-8-24@1.65 volts as a PAIR.. not as 4 chips
Its harder to drive 2 chips per channel than one.

so it may not be stable without tweaking.
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a b } Memory
October 18, 2009 8:14:50 PM

Nevermind .... I was just gonna say "you're probably getting old like me ... otherwise gonna echo advice above.
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October 18, 2009 9:12:41 PM

to rand_79: I did tweak to get to 8-8-8-24 on all chips, but im not sure if its 100% stable, i will have to memtest it. Also will these timings at 1600Mhz give any performance increase over what i had before?
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