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post #3091 of 9641
Quote:
Originally Posted by ToxicAdam View Post
Are you sure about that?



I'm reading they were the same.
I swear that I saw at one point, that he only used 2000NB for 1600 and raised it to 2600NB for 1333. I can't reme,ber where. I will have to serch for it.

Quote:
Originally Posted by BlackOmega View Post
In the real world it failed twice. Did you run Prime95 for 8 hours or more? Prime stresses it completely including the RAM and that's where you'll see stability issues. IMO, 8 hours is the minimum to be able to claim stability. Ideally, when doing final stability testing you'd run it for 24 hours or more.


Personally, I've heard nothing but good things about G.Skill RAM. Overclocks great and is usually reasonably priced.



How much stability does increasing that voltage add? Has anyone tried testing it on a C2 revision chip?
Start reading my posts from #2720. This was ll done on a C2 PhenomII x4 810.

Quote:
Originally Posted by eclipseaudio4 View Post
Well here's where I am at so far. ~stock on left OC on right. I cant seem to get the timings down to save my life so I guess I will stick with OC'ing the ram.
E,

I'm telling you man, you need to up your tRAS to at least 27 for 9-9-9.

tRAS is supposed to be calculated from adding CL+ tRCD+tRP 9*3= 27. That could be your main issue of not being able to hit lower timings. Also make sure that you change your tRC. tRC = CL+ tRAS. 9+27 (36) no offense. I just dislike seeing people struggle.

9-9-9-27 (9*3=27) then (9+27) =tRC of 36
8-8-8-24 (8*3=24) then (8+24) =tRC of 32
7-7-7-21 (7*3=21) then (7+21) =tRC of 28
6-6-6-18 (6*3=18) then (6+18) =tRC of 24

Now, all of the tRAS could be raised to increase stability as well. That would yield the tRC having to be recalculated as well.
Hope this helps. Try it one time and see what happens. If I'm wrong then you can call me out. Remember though, you have to try the calculations and above...
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post #3092 of 9641
Quote:
Originally Posted by IdPlease View Post
Yep, I been on Corsair site and some peeps are having problems running at 1600, stable at least but does 1300. The Geil are cheaper and from i've read seem to do the rated speeds. I think I will go for the Geil, Corsair is tempting as chances are they will be ok also..
If its any bit helpful I just booted into windows with 8Gigs of CMD4GX3M2A1600C8. In the MSI 790FX-GD70 with the 955BE. Running 1333mhz with 7-7-7-24 1T and RC[34]-RFC[74]-CR[2]-RRD[5]-WR[10]-WTR[5]-RTP[5]

This isn't the SPD for 1333mhz, I figured the ram should be fine for 7-7-7-24 instead of 9-9-9-24 which is the SPD for 1333mhz. Especially where its rated for 8-8-8-24@1600mhz.

So whether or not you are interested in Geil or Corsair, I can pretty much tell you for sure with 4 sticks of good CMD4GX3M2A1600C8 you can run them at 1333mhz with those timings on an MSI 790FX-GD70 at stock CPU, CPU-NB and default HT and 1.65V on the ram you will be able to boot into Windows 7 Pro xD.
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post #3093 of 9641
Quote:
Originally Posted by Mastiffman View Post
Last night I was sippin on few cocktails (100 proof Captain and Dr. Pep.) and went for kind of a suicide run... Check these out!? Nothing big, they're only Validations. I wish they were stable.
Wait!?!?!?!

100 Proof Captain???????????

I need to know where to get that spec...NOW!!

I knew there was CMPS, which is 90...but...100?

I may have found a new love if this is true.
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post #3094 of 9641
So with all this talk of Ram Timings and ram modification, how would one such as myself go about tightening the timings of my ram to something even lower than 7-7-7-24-34. The stock tested values are 1600mhz 1.65v 8-8-8-24-41. And of course I am trying to run 8gigs of ram but, I sorta want to go higher. I dont know what Im at. I really don't know a whole lot about overclocking. I mean I did get 3.8ghz stable but, any help with this would be much appreciated.
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post #3095 of 9641
OK...so...back on topic:

This weekend, I got some time to fiddle with the new build, and I managed to get the OC very stable from 3.465 to 3.675GHz and actually using less CPU Volts. I went from 1.425 to (I think) 1.4 (might have been 1.3875).

Since I'm trying to limit volts to keep the temps down cause of using the 92mm HSF, I'm sticking with that clock on this box. It ran overnight on Prime95 64-bit small FFTs for 7+ hours without a hiccup.


BTW, NCspec:

If you're lookin for a board still, I'll check the one I have at home. I'm not sure if that old thing is AM2 or not. i'd have to look it up. I can let you know by tonight. Let me know.

EDIT: Just did a Google on it...think it's Socket A and not an AM2. Sorry
Edited by jck - 12/21/09 at 8:03am
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post #3096 of 9641
Quote:
Originally Posted by mduclow View Post
Welcome, I am running that same memory. You should be able to set it to 1600Mhz, 8-8-8-24-1t @ 1.68v. Yes, the slight voltage increase will probably be necessary, and won't hurt it at all.

If you want to run it @ 1333Mhz, then set the timings to 7-7-7-21-1t, @ 1.68v.

Good luck!

Marc
Thank you for the reply...
I will your help a bit more though, if you are patient enough with me...
Currently, from CPU-Z, the DRAM clock is at 666MHz and the timings as follows:
CL: 8
tRCD: 9
tRP:9
tRAR: 20
tRC: 33
CR: 1T
Voltage: Default (Auto, should be 1,65V)

Do you thing I would see a big difference if I changed timings / voltage as you suggested?
And because I am a little stupid with these things, how do we change the voltage (they're all greyed out in the BIOS)

Thanks again...
post #3097 of 9641
Should I make any changes to the tRFC0, tRFC1, tRFC2 and tRFC3 settings in the bios? My memory has manufacturer timings of 7-7-7-20 @1.9v. In memory Z it displays 7-7-7-20-59-8-4-4-4 with 59 being the the DRAM TRFC. That 59 seems high to me, should it be this high? In windows in cpu-z my timings show as 7-7-7-20-27 in 1T mode. Originally it was showing as 7-7-7-20-40something in 1T mode until I manually changed the tRC to 27.

Edit: I'm not trying to OC, I'm just trying to get the most out of the RAM that it actually advertises.
Edited by hybridfury - 12/21/09 at 10:36am
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post #3098 of 9641
I am some what new to overclocking anyway I have been able to get my operating system up on 4.0 gig but I cant get it stable in prime95 I have read alot on this forum but just cant seem to find anything. so if you guys have any tips i would apreceate it
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post #3099 of 9641
I am thinking about getting this board with an AMD Phenom II X4 965 Black Edition. Will this board support this CPU out of the box? Also why would you guys suggest getting this board over say the Asus M4A79T Deluxe?
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post #3100 of 9641
Hey gang,

I have been playing around with my numbers and heres what I landed at last night...

CPU 3.8 @ 1.435
RAM 1333 7-7-7-21-28 @ 1.75
Everything else auto.

I watched prime run for a hour and a half before I went to bed so i think i'm headed in the right track. Before I went to bed the highest temp I saw was 48C and that was right before i went to bed. When I woke up it was at the win login screen so I know sometime last night it got the ol BSOD. I'm aiming for 6's in the timing but i'll take one thing at a time.

For me to get this setup stable what would you recommend?

If i understood Omegas post then I should try to bump up the volts on the CPU. I was gonna try to bump it up a notch and try prime again I just wanted to check in with the crew to see if my ram setup was looking ok.

Also, what do you recommend for me to use to log my cpu temps and times so if it crashes over night or when i'm away ill know what time and what temp it was at around the time of the crash.

Any info is greatly appreciated.
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