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3870k ~preliminary overclocking

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I think these are primary timings. There are a further 6 or so timings which I need. I think my board is setting these too aggressive and need to set them manually.

Sent from my Galaxy Nexus using Tapatalk
 
mattyc said:
I have been trying all weekend and cannot get my ram stable at 1600. It bsod anything above 1333 even if I pump high volts through it. My ram is corsair xms 1600 rated for 7-7-7-20. I think my Asus board is setting the secondary timings to tight, I have set nb volt to 1.4 ram at 1600 9-9-9-35 and it still bsod. Where can I find out the secondary timings for my ram? This ram ran on last Intel board at 1866 8-8-8-24 all day long. Its just either the 3870k or my Asus itx board.
Has anyone else got memory problems on Asus f1a75-i deluxe. I am running newest BIOS 602.
Thanks in advance.

Sent from my Galaxy Nexus using Tapatalk
Click to expand...

what are your secondary timings set to ?

try these, they are loose for 1600 speed
1.5v
9-9-9-26 1T command timing
secondary timings:
35 row cycle time
12T write recovery
160ns trfc
26 four bank window
6 command delay twtr ("dram write to read delay" in asus bios)
6 precharge time ("dram read to pre time" in asus bios)
5 ras to ras delay

write recovery and the last 3 are very demanding when set too low, those will make you unstable
if those are stable you can try tightening them a bit later

The asus board lists the SPD timings in the bios (tools menu, spd information). Use those for reference.
Also note that the auto settings are likely optimized for overclocked 1.6v memory. Not 1.5v. and are likely to be unstable with most memory.
 
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more optimized timings might be:

Primary: (what's usually written on the dram box/package)
8-9-8-25 1T
Secondary:
34 row cycle time
10T write recovery
110ns ref cycle time
26 four act win time
6 dram write to read delay
6 dram read to pre time
5 dram ras to ras delay

again carefull with the last 3, you might need 1.6v or 1.5v dram for those, depending on your ram.

Burn yourself a memtest86+ cd
if you can't complete atleast 1 full run (maybe 45min+) then it isn't fully stable
 
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My ram requires 1.65v. Thanks for help though, I will try shortly and let you know.

Sent from my Galaxy Nexus using Tapatalk
 
Don't know, must be my signature or in a setting somewhere. Using a program called tapatalk from my mobile phone.

Anyway, earlier today I took out my 2x2gb corsair 1600 7-7-7-20 ram and put in a spare gskill 4gb 2133 11-11-11-30 stick. I got it to run and be stable at 1600 11-11-11-30 but I got a much lower windows score for gpu, CPU and memory and system felt much slower. I think I will go back to the corsair stuff and run it at 1333 7-7-7-20 as it felt faster and windows experience score is miles higher for all components. I thought llano was better with looser timings and faster ram speed but obviously not. I will perceiviere to get this corsair ram running at 1600 with the loosened timings given to me earlier.
 
mattyc said:
Don't know, must be my signature or in a setting somewhere. Using a program called tapatalk from my mobile phone.

Anyway, earlier today I took out my 2x2gb corsair 1600 7-7-7-20 ram and put in a spare gskill 4gb 2133 11-11-11-30 stick. I got it to run and be stable at 1600 11-11-11-30 but I got a much lower windows score for gpu, CPU and memory and system felt much slower. I think I will go back to the corsair stuff and run it at 1333 7-7-7-20 as it felt faster and windows experience score is miles higher for all components. I thought llano was better with looser timings and faster ram speed but obviously not. I will perceiviere to get this corsair ram running at 1600 with the loosened timings given to me earlier.
Click to expand...

why can't you just try some of the timings I suggested in 3 different posts ?
 
Soulkeeper said:
more optimized timings might be:

Primary: (what's usually written on the dram box/package)
8-9-8-25 1T
Secondary:
34 row cycle time
10T write recovery
110ns ref cycle time
26 four act win time
6 dram write to read delay
6 dram read to pre time
5 dram ras to ras delay

again carefull with the last 3, you might need 1.6v or 1.5v dram for those, depending on your ram.

Burn yourself a memtest86+ cd
if you can't complete atleast 1 full run (maybe 45min+) then it isn't fully stable
Click to expand...

Thanks very much for ^ timings! Got it 45 minute prime 95 blend stable with 7-7-7-20 1t timings and the secondary as you advised. My Asus motherboard was setting these secondary timings much lower and causing the bsod. Now, let me try to get 1866!!
 
Had another reboot! Was 45 minute prime stable but when I ran 3dmark 2006 I got a reboot. Trying the first ones you gave me at 9-9-9-25 1t. What should I set my voltages to or leave on auto?
Edit. Just realised I was trying all this with gpu overclocked to 800mhz from 600mhz. Will retry with gpu at stock speed. Still unsure what to set voltages at but will leave on auto for now.
 
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OK. Give up! Them settings are prime 95 stable, even with gpu at 800mhz but as soon as I run anything graphics or even Wei, even with gpu at 600mhz and loosest settings at 1600 9-9-9-25 I get bsod or reboot. My board or 3870k just doesn't like anything above 1333 memory speed no matter how loose the timings. I presume I will be best to leave it at CPU overclocked to 3.3 gpu overclocked to 800mhz ram at 1333 7-7-7-20 1t and tighter auto secondry settings. This seems the only option.
 
The voltage should be 1.65 if more than 1333mhz and 1.5 if 1333mhz. (crudely speaking)
Sad to hear it didn't work for you. Although you said 1600mhz was stable? You have 1600mhz RAM so it should work at that frequency. Seriously, your motherboard is marked to support at least up to 1866mhz and that's the way it's supposed to be. I'm sure you've simply overlooked something, perhaps?
 
I've tried everything. I am wondering if I have a faulty CPU or faulty motherboard. I have some gskill memory rated at 2133 11-11-11-30 and I can't even run this at 1600 9-9-9-30 with this board and CPU. I would love to know if anyone has the same CPU AND the same motherboard if they have the same problem. I tried uping my CPU voltage to 1.5 and still rebooted. The nb voltage was 1.25 but I tried that also at 1.35. Should I be changing any other voltage? I am leaving the frequency at 100 and just running CPU at x33. I suppose this is a itx board and its very small, maybe this is the best I can get it at.
 
yeah, definitly something wrong if you can't get default voltages/speeds/timings to be stable.
also 1.35+ volts for the non-cpu portion of the APU is not needed, and potentially dangerous.
default voltage for the nb/gpu is usually set to 1.20v or less for stock speed
 
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Soulkeeper, so 3.4ghz overclock is the sweet spot for you? Why is voltage so high? Is it possible that my chip will be able to run on higher frequency stable? Also is 1.5v really enough for 1866mhz RAM?
 
Kristijonas said:
Soulkeeper, so 3.4ghz overclock is the sweet spot for you? Why is voltage so high? Is it possible that my chip will be able to run on higher frequency stable? Also is 1.5v really enough for 1866mhz RAM?
Click to expand...

I have to run my RAM at 1.65V for 1866MHz
 
richierich1212 said:
Llano is an APU, so you can't really expect it to hit 4GHz without thermal limitations
Click to expand...


Disabling gpu doesn't increase cpu clocks... Personally, my limitations are not thermal related. Noctua c-series, blows air directly through my ram, and over the cpu power delivery system.

I don't see why ram would bee overvolted to reach stock frequencies and timings. Stock should run at stock...... I have 16gb g-skill 1866, at 1.5 volts. Even in slightly overclocking bclk I haven't had to touch timings or voltage... If you can't get ram to work the way it is supposed to work, either a setting is wrong somewhere, or something is wrong with your hardware. Use memtest to verify ram stability.

-Chris
 
Kristijonas said:
Soulkeeper, so 3.4ghz overclock is the sweet spot for you? Why is voltage so high? Is it possible that my chip will be able to run on higher frequency stable? Also is 1.5v really enough for 1866mhz RAM?
Click to expand...

it's definitely possible to go higher, hard to say how likely
just another luck of the draw thing I suppose ...

1.41v is the "normal" or default vcore in my gigabyte bios and around the upper limit for what amd says the chip can safely use. 1.38v wasn't stable for me so I just put it at "normal".

"0.45 to 1.4125V" is what AMD told me in an email is the default

my ram is 2133 10-11-10-28 1.5v mem, so i'm actually running it underclocked
 
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Because I haven't used amd for over 8 years, I am wondering if it is a setting I forgot to click! Has anyone seen a bios guide to the Asus f1a75-i deluxe? There are a few settings I am unsure about like spread spectrum and a lot of settings in the bios voltage page like strength settings and similar, I just left all at auto. PS, thanks for everybody's help!
 
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