frequency issues, should I return RAM?

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Guest

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I bought a pre-built PC with the Asus M5A78L-M motherboard and with 2x4gb A-DATA 1600mhz ddr3 RAM.
I had many random BSOD's and eventually used memtest86+ to find that the ram was faulty. I later reduced the ram frequency from 1600(stock which was running at first) to 1333. The BSOD's stopped and memtest no longer gave errors (8 passes).
The MB documentation says it supports 1066/1333/1600(o.c)/1800(o.c)..............
Does this mean I need to overclock my cpu do be able to use the 1600mhz RAM (the discription has an 'o.c.' next to it but not for 1333mhz.

specs:
cpu: amd fx 6300 (stock at 3500ghz but amd turbo to up to 4100ghz)
mb: M5A78L-M
ram: a-data ddr3 2x4gb 1600mhz ram
gfx: amd r7 240
 
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G

Guest

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Thanks for replying, so the RAM is definitely faulty? (otherwise I will have to pay for delivery etc when i return the RAM)
 
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J

johnbl

Polypheme
Nov 4, 2012
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a lot of times the actual RAM is not bad but the BIOS has incorrect default settings and you just need to set the correct values for your RAM. most of the time some of the cheaper RAM takes 2 command states(clock cycles) and the BIOS is set to 1. (or do a BIOS update to get new default values)
The spec may indicate 9-9-9-24 at 1.5 volt but really should say 9-9-9-24-2N at 1.5 volts. There are many more timings for RAM chips and some motherboards assume faster secondary timings than the cheaper RAM sticks are spec to.
That is why you will often see BIOS updates that have fixes for "memory compatibility"
 
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Tradesman1

Tradesman1

Legenda in Aeternum
Jun 5, 2013
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Could be a few things, try a BIOS update if available - next to try is simply raising the DRAM voltage to about 1.56 from the 1.5 stock and/or raising the CPU/NB Voltage up + 0.10 (i.e. if currently 1.1 raise it to 1.2) this is your MC (memory controller) voltage
 
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G

Guest

Guest
I reset the bios to default (auto) and the problems continued (i didn't change any of the timings/latency and left them to auto) after updating the bios i looked at the list of compatible RAM for this motherboard and this was not on the list so i assumed that was probably the issue, i returned to retailer and hope they will send back ram that is actually compatible this time.
Thanks for all the help!
 
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