tried RAM swap now computer won't boot.

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Automatt

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Nov 30, 2014
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I have a computer with an ASUS Z87-A mobo and i5 cpu. Everything was working perfectly until a short time ago. I tried swapping the 2 4mb sticks of Hyper X DDR3 1600 RAM for 4 4mb sticks of Hyper X Fury DDR3 1600 RAM. After the swap the computer would not boot. It would turn on, then immediately turn off, then turn itself back on, but not boot. I tried swapping back to the 2 original sticks of RAM that worked before I started and had the same problem. The DRAM led shows solid red on initial boot attempt. I've tried the MEM OK button and the computer starts, shuts off, restarts, after a few seconds the DRAM led blinks slowly, then a few seconds later blinks faster, then after about 15 seconds the computer shuts down, and the whole process starts itself again. During that time the CPU led will blink red periodically, then come on just as the computer shuts down. At no point do I get anything on the monitor. Can anyone help?
 
Solution
capt_taco
When you use 4 sticks of RAM, it can be a little harder to keep stable. Try going into the BIOS and increasing the DRAM voltage slightly (from 1.5V to 1.52 or 1.54V).*

Worst case, you can simply go back to two sticks. If you are using your machine for heavy-duty graphic design or video editing, 16GB can help compared to 8GB, but if your main purpose is gaming you will notice literally no difference at all; the second 8GB is just overkill.





*You may have to temporarily remove two sticks to change the setting if the machine is turning on and off before you can get into the BIOS

**If you have a 1.65V set, don't increase the RAM voltage over 1.65; it can cause side effects that damage i5/i7 CPUs.
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lfkfkfkffs

lfkfkfkffs

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Apr 2, 2014
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Have you done the basics yet with just 1 or 2 sticks of the new memory? just take the battery out of the motherboard with the power supply unplugged and wait a full minute then with only 2 sticks of the new stuff in just let your computer complete the adjustments with the blinking lights twice. If it goes through two full power cycles without posting let me know
 
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Automatt

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Nov 30, 2014
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I unplugged the power supply, took out the battery, waited a couple of minutes, put back the battery and tried again. This time it didn't shut down right after it powered on, but it didn't boot and the DRAM led stayed solid red. I waited a few minutes and nothing changed, so I tried the MEM OK button and it went back to the same cycle of the DRAM led flashing, occasional flashes from the CPU led, and finally the CPU led lights and it shuts down then starts itself again. I've been thru it twice now and it still won't boot.
 
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capt_taco

capt_taco

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Aug 5, 2009
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When you use 4 sticks of RAM, it can be a little harder to keep stable. Try going into the BIOS and increasing the DRAM voltage slightly (from 1.5V to 1.52 or 1.54V).*

Worst case, you can simply go back to two sticks. If you are using your machine for heavy-duty graphic design or video editing, 16GB can help compared to 8GB, but if your main purpose is gaming you will notice literally no difference at all; the second 8GB is just overkill.





*You may have to temporarily remove two sticks to change the setting if the machine is turning on and off before you can get into the BIOS

**If you have a 1.65V set, don't increase the RAM voltage over 1.65; it can cause side effects that damage i5/i7 CPUs.
 
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