how do i fix this

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crazyahren

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Oct 18, 2011
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Sorry to ask this question. I'm way to nervous of a person to do this without exact direction for my setup in fear ill blow myself up. That being said this is my rig in a nutshell

i5 2500k

Corsair XMS3 8GB (2x4GB) DDR3 1600 MHz 1.65v http://www.newegg.com/Product/Product.aspx?Item=N82E16820145324

gigabyte z68xp-ud4

850w thermaltake power supply

gt560 770 on the way though

i downloaded cpuid and it says my Dram frequency is only 665.2. now i hope on not completly wrong in saying this is the "speed" of the ram and it should be around 1600?
the clocks on it match what the sticks say. i was gonna attempt to use the xmp (think thats what its called) in the bios but i wasn't completely sure. I had read somewhere that dram over 1.5v dont overclock with i5's, but im a noob so i'm just confusing the crap out of myself.
 
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The DRAM frequency is the frequency of the DRAM IO bus reference clock. Data is transferred along the DRAM IO bus on both the rising edge and the falling edge of the reference clock; this is why DDR stands for Double Data Rate. The transfer rate (not the frequency) for DDR/DDR2/DDR3/DDR4 is twice the IO bus rate as a result, so an IO bus reference clock frequency of 666.67Mhz yields a transfer rate of 1333 megabits per second per IO pin, also known as DDR3-1333. Accordingly, DDR3-1600 has an IO bus reference clock of 800Mhz.

Since you have moemory that is DDR3-1600 and a CPU that only natively supports DDR3-1333, you will need to reconfigure your memory controller to use the unsupported specifications. If the memory module contains an...
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The Batman is Clark Kent

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Dec 27, 2013
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sounds like you lowered your bclk setting. that underclocks the whole board. pcie chipset. sata everything.
just clear your cmos to reset everything and apply the XMP. dont change anything if you dont know what it is. if it was your bclk and youd went to far up with it you could have fried alot of things.
 
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The Batman is Clark Kent

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Dec 27, 2013
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my mistake i misread that. i thought youd changed frequencys.
just apply the xmp from bios and it should correct. but also your ram wont constantly sit at 1600. it will jump up when under stress much like your cpu goes into turbo.
if xmp isnt working you need to go into your bios and set your ram timings and voltages manually based on what is on their labels.
 
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crazyahren

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Oct 18, 2011
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I have never adjusted anything. I got it put together so i guess they didnt do something. So just to clarify, when you say clear the cmos you talking about the jumper switch on the board itself? ill google exactly what to do with my board, but just making sure that is what your referring to.

 
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crazyahren

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Oct 18, 2011
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thanks buddy, ignore my first reply. ill do all that now. much appreciated!
 
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Pinhedd

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The DRAM frequency is the frequency of the DRAM IO bus reference clock. Data is transferred along the DRAM IO bus on both the rising edge and the falling edge of the reference clock; this is why DDR stands for Double Data Rate. The transfer rate (not the frequency) for DDR/DDR2/DDR3/DDR4 is twice the IO bus rate as a result, so an IO bus reference clock frequency of 666.67Mhz yields a transfer rate of 1333 megabits per second per IO pin, also known as DDR3-1333. Accordingly, DDR3-1600 has an IO bus reference clock of 800Mhz.

Since you have moemory that is DDR3-1600 and a CPU that only natively supports DDR3-1333, you will need to reconfigure your memory controller to use the unsupported specifications. If the memory module contains an XMP profile this can be done quite easily by enabling the XMP overclocking tuner and selecting the appropriate XMP profile (if there's more than one, select the highest number). The Newegg listing indicates that your memory does have an XMP profile, so I won't go into any more detail.

SIDE NOTE: Corsair XMS3 memory is trash. It's cheap because the chips are failures that have been returned to working order by applying above-normal amounts of voltage. They're not suitable for the Vengeance or Dominator lines so they get passed down; they're one level above the trashcan. Additional voltage above the JEDEC standard is applied to bring them back into working order. There are DDR3-1600H modules out there with the exact same performance that require only 1.5 volts or even 1.35 volts. 1.65 volt memory will put a bit more stress on your CPU; not a significant amount, but please be aware that it is not ideal.
 
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crazyahren

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Oct 18, 2011
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yeah, sadly when i picked this out it was a crappy pre-built i bought in a pinch. I have a new one mapped out, and soon i will have all you pro's look it over so i dont do anything quite as stupid as this again. ty
 
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