Issue with RAM on 970A-UD3P failing to boot.

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Vicousvern

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Jun 11, 2014
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Hello, recently I built a new pc and after looking through the bios it appears my RAM isn't running at its advertised speed. It should be 1866Mhz but in the bios is 1334Mhz. If I enable the XMP profile which sets it to 1866 I get a boot failure. The PC does work but, I'd be nice to have the speeds it should.

My specs are:
Gigabyte 970A-UD3P - Official Specs
AMD FX-8350
4 x 4Gb Crucial Ballistix Tactical Tracer - Ebuyer
GTX 770

According to the board specs it says it should be able to run them, so I'm not sure whats going on. Any help would be appreciated, or if this speed is correct and its just me I apologise.
 
Solution
If you have the patience, I bet you can get them running at 1866. I'd start by trying 1600 though. Be ready for some CMOS Clears if it becomes so unstable that it does not boot.

I managed to get 16GB of mixed RAM kits running at 1800CL7 and one of the kits was only rated 1600CL9 and this was on an FX-4100 with weaker memory controller.

You can try some of my settings:

http://www.gskill.us/forum/showthread.php?t=10657

Vicousvern

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Jun 11, 2014
13
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4,510
Hey, came across something unusual. My PC and other programs think my memory is running @ 1334? But others show 1600. Is it a Windows issue or is my memory still running at the lower speed? I've added a link to the screenshot because it'll show too big on the thread.

postimg.org/
Oh also on the screenshot got a good score in maxxmem. :)
 
+

CPU-Z and MaxxMem are right with 1600MT/s.

3DMark is reading the SPD tables on the RAM which it defaults if set to auto. Like for mine it says 1600 even though I ran 3DMark at 2600 :D

CPU-Z (on the SPD tab), AIDA, and Sandra can all read the various SPD tables if you are interested in those failsafe timings.

 

Vicousvern

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Jun 11, 2014
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4,510


Yea I noticed the SPD table in CPU-Z was using it the other day when I was tuning.
Tried again to day to see if I can get the timings lower, Tried 7-6-7-23 but it hates going lower than 7.

So I've gone as low as 7-7-7-17-26 1T. Don't think its going to let me push any more before it becomes unstable.

Was going to try 1866 but my bios wont let me edit the DRAM Voltage, its currently set at 1.50v and I'm sure I read it has to be 1.500v (yea it says in the SPD table). It let me do the CPU NB voltage but it failed to boot so I've just reverted back to 1600CL7. At least until I can see how to edit the voltage.