Got (DQS training failed on previous boot, reverted to slower Dram)

gamersc2 · Jul 4, 2013

My power went out for 1 second and my PC stayed on while monitor was black like if it lost signal. Once I restarted the computer it gave me the error: DQS training
failed on previous boot, reverted to slower Dram

I then restarted when the power was normal again (lights were flickering) and everything is back to normal.

Did the Dram revert back to "fast or notmal" automatically? Or do I have to go into bios? I can't find the option under BIOS regardless so if anyone has an answer if everything is back to normal or I need to re-revert it back to ffast/normal, please let me know! Thank you

C12Friedman · Jul 4, 2013

Are (were) you overclocked at all? What mobo, ram and CPU? You can download CPU-Z and see if your ram is running at it's spec'ed speeds

gamersc2 · Jul 4, 2013

Windows 2.6.1.7600
CPU Type:

AMD Athlon(tm) II X4 640 Processor
CPU Speed:

3.02 GHz
System Memory:

4.29 GB
Video Card Model:

NVIDIA GeForce GTX 460

TA785G3 HD

I downloaded CPU-Z, how do I determine if the dram isn't on 'slower'?

Reads 667 Dual Channel for 1600, 1.5v, is that correct?

C12Friedman · Jul 4, 2013

1600MHz ram should show as 800 in CPU-Z (the single data rate), 667 is reporting a dual rate ram speed of 1333MHz - you should be able to set the ram back to 1600MHz in BIOS. I'm thinking that by the component list, your system is 2+ years old, have you had any issues with the CMOS clock needing to be set when restarting?

gamersc2 · Jul 4, 2013

Never had any problems with the computer until the power went out for that 1 second keeping the PC on but monitor on standby. Clock has never reset or anything. I don't even know if I had it set to 1600. Where do I change those settings in BIOS?

Forgot to add, I had to turn the PC off through power supply switch, it wouldnt through on/off button.

C12Friedman · Jul 4, 2013

According to Biostar here http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=458 that motherboard only supports ram to 1333 so it would appear that CPU-z is reporting correctly and you may not be able to run the ram at 1600MHz

note: link is to ver. 5 of the motherboard, if you have a different version, specs may be different

gamersc2 · Jul 5, 2013

Thanks, glad to know all is well.

Tradesman1 · Jul 5, 2013

Yep, the X4 is pretty much limited to 1333, the 965 C3 was the first that could fairly reliably run 1600 sticks

Alexandre Semocas · Dec 16, 2014

gamersc2 :

Replace the motherboard battery , lost power as it came back to default setting , this would be the first message settings.

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Got (DQS training failed on previous boot, reverted to slower Dram)

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