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Not getting full speed out of installed memory - new build

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February 15, 2014 4:11:19 PM

Just built a new machine and I can't get above default 1333MHZ memory speed. If I try to boost it in my BIOS PC doesn't boot. I'm not really an overclocker. Here are my components:

Mobo:Gigabyte GA-F2A88XM-HD3, F5 bios (latest non-beta)
CPU: AMD A10-7850k
Memory: Gskill Ares F3-2400C11D 16GB (2x8)
HD: WD Black
PSU: Corsair CX430M

Mobo supports 2133 speed as does the processor but if I try to set the memory speed any higher (like using XMP) PC doesn't boot. I called Gigabyte tech support and they told me I need to overclock the CPU in order to get to 2133 memory speed. That didn't make sense to me but I tried some settings. Thing is I don't know enough about OC to do it well/properly.
Is that true, do I need to OC the processor to get from 1333 t0 2133? Please help.
February 15, 2014 4:32:32 PM

No you should defiantly be able to run 2133 at stock speeds. It can be that the motherboard and RAM is not functioning right together.
Did you try other speeds than 1333 and 2133?
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February 15, 2014 4:40:25 PM

nothor said:
No you should defiantly be able to run 2133 at stock speeds. It can be that the motherboard and RAM is not functioning right together.
Did you try other speeds than 1333 and 2133?


Not sure how. Memory is installed and the BIOS reports it as 1333. I've tried increasing the speed to the next bump up (1600 I think) and PC won't boot. I've tried increasing the RAM voltage a little (stock is 1.50v, I tried 1.55 and 1.6). I noticed if I Enabled XMP voltage gets set to 1.65v and I've tried that at 1600,1866, etc. Anything I tried failed to boot.

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February 15, 2014 4:40:26 PM

nothor said:
No you should defiantly be able to run 2133 at stock speeds. It can be that the motherboard and RAM is not functioning right together.
Did you try other speeds than 1333 and 2133?


Not sure how. Memory is installed and the BIOS reports it as 1333. I've tried increasing the speed to the next bump up (1600 I think) and PC won't boot. I've tried increasing the RAM voltage a little (stock is 1.50v, I tried 1.55 and 1.6). I noticed if I Enabled XMP voltage gets set to 1.65v and I've tried that at 1600,1866, etc. Anything I tried failed to boot.

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February 15, 2014 4:48:27 PM

Try to clear all OC memory and cpu settings and only change memory settings to XMP.
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February 15, 2014 4:56:39 PM

That was the way I started, enabling XMP and thats it. Didn't work. Right now everything is at stock/default, but it really irks me that my memory speed is only 1333, I know that will impact my graphics performance being an APU.
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February 15, 2014 5:15:59 PM

I understand it's frustrating that it doesn't work since you will defiantly have something to gain from the higher speeds.
I think it is weird that gigabyte states the cpu most be overclocked to use higher speed rams, maybe you can ask them to elaborate this, what speed should the CPU be running to work with ram at 2133 MHz?

There is a chance you can make it work if you tweak the clock and speeds just right but there's no guaranty. and this seems to be what you've been trying to do.

it just seems that your motherboard and these exact RAM sticks just don't play well together.
Now there's little more i can think of other than trying different high speed sticks preferably from the memory support list from gigabyte http://download.gigabyte.us/FileList/Memory/mb_memory_g...

edit: also check that all the settings are as specified for those sticks when XMP is enabled, if not manually change what differentiates from the specifications.
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a c 1942 } Memory
February 15, 2014 6:33:56 PM

Try enabling XMP the raise the CPU/NB voltage up to 1.25
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February 16, 2014 7:42:12 AM

My mobo does not tell me what voltage the cpu and NB are currently at and allows increments in +.06. I tried raising each one 3x to +.18 and nothing worked. I was too skittish to go higher than the 3 clicks.
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February 16, 2014 8:06:16 AM

Must of bean that you have all your slots equipped with your ram sticks if you know if you have like 4 Slots you will use only 2 of them the second and the fourth (Or basically use half of the slots that you have on your motherboard) and it will have the maximum speed if you use all the slots you will loose speed and might be your PSU Having not enough power to overclock it
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a c 1942 } Memory
February 16, 2014 8:08:09 AM

I'll see if I can pull down a manual for your mobo later today
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February 16, 2014 8:41:26 AM

Georgey:

My mobo has 2 RAM slots and they are both occupied (2 8GB sticks). My PSU is 430W, which I know is small by today's standards but keep in mind I have installed only 1 HD, a DVD drive, and thats it besides the CPU. I was looking to build a minimalist oriented PC.
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February 17, 2014 1:59:03 PM

SOLVED!

I called G.Skill tech support. XMP or 2400 wouldn't work but we got 2133 to work (we tried a few settings but I said lets just go with 2133). Had to adjust timings (to 10, 12, 12, 31) and up the NB voltage. We added +.102v but after a while I edged it down to +.090. I might try to gradually edge it down more but for now it works and is stable so far.
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a c 1942 } Memory
February 17, 2014 2:02:04 PM

Glad to hear, and 2133 is still very good, have fun ;) 
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