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3870k ~preliminary overclocking

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Soul keeper


I have 1 4gb stick of gskill 2133 11-11-11-30 1.5v. Can you give me some best guesses to get running at either 1600 with tighter timings or 1866. I will try tonight and may have more joy with this 1 stick.
Thanks.
 
mattyc said:
Soul keeper


I have 1 4gb stick of gskill 2133 11-11-11-30 1.5v. Can you give me some best guesses to get running at either 1600 with tighter timings or 1866. I will try tonight and may have more joy with this 1 stick.
Thanks.
Click to expand...

Page 2 has pictures of the timings that i'm currently using on my mem at 1866 speed
try them
 
mattyc said:
Because I haven't used and 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!
Click to expand...

Yeah, leave all that on auto.
it's stuff that is likely only there for extreme cases

There are way too many motherboards out for people to write step by step guides on every motherboard.
For the most part they are all very similar, just google a term and you'll get a general idea.
 
By the way. Llano doesn't work with Corsair CX power supplies. Tried two CX 430W V2's and neither worked without an additional graphics card.
So I've picked up a Cooler Master GX 450W. Will know if it'll work tomorrow.
 
Kristijonas said:
By the way. Llano doesn't work with Corsair CX power supplies. Tried two CX 430W V2's and neither worked without an additional graphics card.
So I've picked up a Cooler Master GX 450W. Will know if it'll work tomorrow.
Click to expand...

odd
I know from the reviews i've seen CX 430W is a cheap PSU, but i'd still expect it to work.
 
Well my attempts tonight have just confused me beyond all doubt! I tried really loose settings on corsair xms 1600 settings and it is not stable at all over 1333, no matter what volts or timings. I then tried my.gskill 2133 at 1866 11-11-11-30 and it is rock solid at 3.3cpu and 800gpu. BUT and this is where it.gets strange, the Wei score, ram test with Everest and 3dmark06 scores are miles lower than when 1333 settings and tight memory timings at 7-7-7-20 1t. For example, 3d mark score is 6901 compared to 5022 and Wei graphics score is 6.8 compared to 5.1.
This leads me to the result that if running a "k" CPU and leaving frequency at 100 and just using multipliers to over clock, you are better with tight timings rather than high ram speed. The only other thing to note is the gskill is 1 4gb stick where as corsair is 2x2gb sticks. Could it be something to do with dual channel memory?
 
mattyc said:
the Wei score, ram test with Everest and 3dmark06 scores are miles lower than when 1333 settings and tight memory timings at 7-7-7-20 1t. For example, 3d mark score is 6901 compared to 5022 and Wei graphics score is 6.8 compared to 5.1.
This leads me to the result that if running a "k" CPU and leaving frequency at 100 and just using multipliers to over clock, you are better with tight timings rather than high ram speed. The only other thing to note is the gskill is 1 4gb stick where as corsair is 2x2gb sticks. Could it be something to do with dual channel memory?
Click to expand...

I take it that 6901 and 6.8 are for 1333mhz and 5022 and 5.1 are for 1866mhz? Really strange. Could be because of messed up timings?
I'm beginning to think you have faulty RAM/MB.
http://www.asus.com/Motherboards/AMD_Socket_FM1/F1A75I_DELUXE/#specifications
here it says your MB should run at 1866 without OC.
 
The thing is, it runs memory at 1866 with correct timings as advised in bios xmp profiles. When I run at 1333, the first timings are 7-7-7-20-1 but the secondary timings the board sets are really low and aggressive but its stable and gets better results. I would imagine a lot of it is to do with it been as single channel but I only have 1 stick of.the 2133 so cannot check if it would give a better result if it was dual channel. Hope that made sense. I cannot see it is a hardware fault now as I have got my 2133 memory stable at 1866 with 11-11-11-30 2t settings but its slower than dual channel 1333 at 7-7-7-20 1t.
 
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Kristijonas said:
By the way. Llano doesn't work with Corsair CX power supplies. Tried two CX 430W V2's and neither worked without an additional graphics card.
So I've picked up a Cooler Master GX 450W. Will know if it'll work tomorrow.
Click to expand...

I am using a CX430 and it works OK.

mattyc said:
The thing is, it runs memory at 1866 with correct timings as advised in bios xmp profiles. When I run at 1333, the first timings are 7-7-7-20-1 but the secondary timings the board sets are really low and aggressive but its stable and gets better results. I would imagine a lot of it is to do with it been as single channel but I only have 1 stick of.the 2133 so cannot check if it would give a better result if it was dual channel. Hope that made sense. I cannot see it is a hardware fault now as I have got my 2133 memory stable at 1866 with 11-11-11-30 2t settings but its slower than dual channel 1333 at 7-7-7-20 1t.
Click to expand...

You want dual channel for the best performance. You will also want faster speeds for best performance. I wouldn't worry too much about tight timings, just find the fastest RAM speed even at the expense of timings. The GPU needs as much bandwidth as it can get, especially for gaming.

Edit: At 1333MHz, 1 RAM chip can provide approximately 10.6GB/s of bandwidth. Two in dual channel will double that to 21.2GB/s. At 1866MHz, 1 RAM chip can provide approximately 14.9GB/s of bandwidth. Two in dual channel will double that to 29.8GB/s.

So yes, Dual channel at 1333 (21.2GB/s) is faster than Single channel at 1866 (14.9GB/s). Ideally what you want is dual channel 1866.
 
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gbeirn said:
I have a 3870K with an ASUS F1A75-I DELUXE (Mini-itx).
Click to expand...

If at all possible, could you either take a few screen prints of your bios settings OR, just make a note of the main BIOS settings, voltages and memory timings? What memory are you running?
Thanks.
 
gbeirn said:
I am using a CX430 and it works OK.



You want dual channel for the best performance. You will also want faster speeds for best performance. I wouldn't worry too much about tight timings, just find the fastest RAM speed even at the expense of timings. The GPU needs as much bandwidth as it can get, especially for gaming.

Edit: At 1333MHz, 1 RAM chip can provide approximately 10.6GB/s of bandwidth. Two in dual channel will double that to 21.2GB/s. At 1866MHz, 1 RAM chip can provide approximately 14.9GB/s of bandwidth. Two in dual channel will double that to 29.8GB/s.

So yes, Dual channel at 1333 (21.2GB/s) is faster than Single channel at 1866 (14.9GB/s). Ideally what you want is dual channel 1866.
Click to expand...

Very interesting! My main PC ssd failed on me last night and looks like I need to rma it back to ocz so I have another 2133 4gb stick. I will have a play around and see what scores I get with 1866 loose timings in dual channel.
 
Good news. Well, sort of! Tried my gskill 2133 in dual channel and its stable and fast! Got it running at 1866 10-10-10-28 1t. Stock voltages. Deffo faster than previous corsair stuff. Still have quite loose second timings but at least I am stable and quicker! 3dmark 06 score has gone up from 6901 to 8302. Memory bandwidth In Everest is much better and latency much lower and Wei scores all up also. Am going to be using this media PC as my main PC for the next few weeks now whilst rma my main PC's ssd so will tighten up the timings and see what else I can squeeze out of it.
 
Nice! You could even try 8-8-8-xx timings. Since those are 2133 sticks, they could work at such timings, I think.
I should finally be getting my PC tomorrow, so could someone explain what's in these pictures?

Soulkeeper said:
before
IMG_0027.JPG

after
IMG_0031.JPG
Click to expand...

I will have this 2x4gb RAM: http://www.corsair.com/cmx8gx3m2a2000c9.html
http://www.skytech.lt/corsair-ddr32000-24g-cl9-kit-xms3chs-p-67554.html Any advice on what changes I should make with my RAM? Thanks!
 
Kristijonas said:
Finally got my signature PC. So what should I set all the timings at with these RAM?
http://www.corsair.com/cmx8gx3m2a2000c9.html
Soulkeeper, could you share all your RAM timings? I'd like to know how to run my 2000mhz RAM on 1866mhz on standard timings and with dual channel.
Click to expand...

My timings are in that picture above.
That corsair ram has the same timings as me, just match them.
the corsair is advertised as 1.65v @ 2000
so this means you could probably run it at 1.5-1.6v @ 1866 if you match the timings
It's really best to only buy 1.5v ddr3. 1.65v stuff is factory overclocked nonsense.

Write them down or print them so you have reference when in the bios.
That's what I did at first. Now i've got them all memorized.
 
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Managed to get my ram running at 1866 with timings at 10-10-10-24-1T. not tested stability but working fine. also overclocked the cpu to 3.2ghz. not really had to chance to try higher values yet though. I think because the Gigabyte A75-S2V is a fairly lower end board, I doubt I will be able to overclock too much
 
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