Ram Speed Question

TheXavier · May 29, 2014

I have 16gb of DDR3 2133MHz ram in my pc. On speccy is shows it as running at 800MHz. I understand that typically you need to double this so it would be 1600MHz. So my question is, why is is still running roughly 500MHz under what it says? My theory is my motherboard supports 2200, 1600, 1333 and so on. So since is isn't 2200, does it just bump it down to 1600MHz? Thanks for any help.

foscooter · May 29, 2014

Is the BIOS set to the correct DRAM speed?

Try using the XMP function in the BIOS to set DRAM timings.

TheXavier · May 29, 2014

So is this just built into the BIOS? I guess I haven't messed around with it enough to know how to do that.

foscooter · May 29, 2014

what motherboard?

spooky2th · May 29, 2014

When first installing RAM it is recognized at the SPD (default) speed and timings. Go into BIOS and set it up correctly to get the advertised speeds. Depending on the MB and CPU, you might even be able to OC it some. Most new memory kits will OC fairly easily to at least the next step up.

What MB and CPU do you have?

TheXavier · May 31, 2014

I have a gigabyte motherboard, the number is GA-P55A-UD3, Rev. 1. My CPU is an Intel i7 860 2.8GHz.

spooky2th · May 31, 2014

You just need to set up the bios correctly which includes the memory timings and speed.

Memory defaults to the MB defaults timings and speed. To get the higher advertised speeds, go into bios.

What is the memory kit model number?

Tradesman1 · May 31, 2014

Go nto the BIOS and enable XMP, then select profile 1 - it will set the sticks to the correct freq, your mobo may run DRAM faster than what the freq of the DRAM you have, so you could try OCing it, but think with your combo, prob best to stick with the DRAM's spec freq

TheXavier · May 31, 2014

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231501

This is the ram I have installed. I enabled XMP and selected the first profile. I left performance mode as standard and Dram Timing Selectable as Auto and when my computer restarted it gave me some sort of error and defaulted back. It mentioned something about overclocking and the voltages. Sorry I have never messed with this before, but I do appreciate all the help.

spooky2th · May 31, 2014

Try setting optimized defaults first then set XMP profile1.

It would help if you gave us the MB and CPU models too.

TheXavier · May 31, 2014

Is the optimized defaults somewhere else in the bios? Also, I gave my motherboard number and processor model in an earlier post, was that not the information you needed?

spooky2th · May 31, 2014

Sorry, I just saw the specs above.

That i7 860 may not be able to handle the faster memory. According to Intel it supports up to 1333MHz memory. Just might be able to OC the memory 10 1600MHz.

i7 860 specs:
http://ark.intel.com/products/41316/Intel-Core-i7-860-Processor-8M-Cache-2_80-GHz

TheXavier · May 31, 2014

Oh I see, I guess I wasn't fully aware I was limited by the CPU I had. It states it's running at 1600MHz though which is cool now that I know that. Thanks for your help, I appreciate it.

spooky2th · May 31, 2014

Great! At least you got it to 1600MHz.

Tradesman1 · May 31, 2014

If you want to run it faster, you'll have to OC the CPU and raise the MC voltage

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