michael-a Posted February 23, 2016 Share Posted February 23, 2016 I decided to upgrade to: Corsair's Vengeance 32 GB (4x8GB) 2400 MHz DDR3 11-13-13-31 1.65v Here's my system: AMD FX 8350 ASUS Sabertooth 990FX 2.0 Now I knew when I ordered that, due to the CPU's weak IMC, the memory will not run at 2400 MHz, but I wanted some headroom in case I decided to switch to Intel later this year. I'm looking for some advice as to what RAM speed/timings/voltage to shoot for on this AMD system. I understand it'll take some stability testing to find out what the CPU is really capable of dealing with. Just looking for ballpark figures from people experienced with this type of thing. Best I can POST at is 2133 MHz w/ 4x8GB sticks. Haven't done stability testing past 1866 MHz. There will be some lag in this thread as I am on 2 sticks at the moment. One or both of the other 2 sticks throws errors at tests 6 and 7 in Memtest86+, tested at 1866 and 1333 MHz. Soon as I find the faulty sticks, the kit will be RMA'd, and that will take a couple weeks before I can push the full 32 GB. Thanks in advance! Link to comment Share on other sites More sharing options...
Corsair Employee Corsair Art Posted February 23, 2016 Corsair Employee Share Posted February 23, 2016 I would honestly go with 1866 at about C9, changing the rest of the timings accordingly. It's a lengthy process if not using the stock XMP/AMP settings, but should not give you much issue once you have it up and running. Link to comment Share on other sites More sharing options...
emissary42 Posted February 29, 2016 Share Posted February 29, 2016 That kit should be able to run at DDR3-1866 9-11-10-27/9-10-9-27 and DDR3-2133 11-11-11-28/10-11-11-28 with a Vdimm in the range of 1.5 to 1.6V. I don't know how good the memory training on the Sabertooth 990FX is, but you might have to manually adjust the secondary timings as well (at least partially). Just remember to adjust tRFC to the next higher value compared to what is given in the XMP, because AMD memory controllers only know very few steps for this timing (90/110/160/300/350, probably 300/350 for DDR3-2133/2400). Link to comment Share on other sites More sharing options...
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