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ASUS M4A785-M CPU VCORE unstable - Page 2

post #11 of 29
Thread Starter 
here is the graphs with the voltage lowered to 1.45 it has completely removed the voltage cut out but seems to me to be on the low end of power for O.C. the CPU for stock 3.0Ghz to 3.6Ghz
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post #12 of 29
Quote:
Originally Posted by ryan w;13267422 
Snip

See those sudden voltage drops? From 1.45 to 1.1
Your VRMs are overheating. Throttling as part of ASUS' OCP (Over-Current protection a.k.a. VRM anti-fail) is kicking in and throttling the CPU until the VRM temps are back down. You need to have some heatsinks on there. Currently due to the D14 tower cooler, they aren't getting any cooling. Otherwise your OC won't ever work properly.
post #13 of 29
Thread Starter 
that it is well looks this is next:
jYrlf.jpg
 
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post #14 of 29
make sure you order two sets!
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post #15 of 29
Thread Starter 
right on thanks sandman yeah I read a few posts from others that did not have full VRM coverage...plan is to install these on all vrm's w/ more fans, then start pushing NB, no higher mem OC cause the G-Skill is already maxed, and try 0 50 and 100 loadline to watch effects on cpu voltage..I would really like to see a the voltage stay at 1.45 under load not just at idle..once i can be happy with that then ill work with some 12 hr stress tests...more graphs to come
 
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post #16 of 29
Quote:
Originally Posted by ryan w;13300473 
right on thanks sandman yeah I read a few posts from others that did not have full VRM coverage...plan is to install these on all vrm's w/ more fans, then start pushing NB, no higher mem OC cause the G-Skill is already maxed, and try 0 50 and 100 loadline to watch effects on cpu voltage..I would really like to see a the voltage stay at 1.45 under load not just at idle..once i can be happy with that then ill work with some 12 hr stress tests...more graphs to come

thumbsupsmiley.png
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post #17 of 29
Thread Starter 
Pay day is here ordered the parts to allow for more cooling!
Newegg is out of MOS-C1's so i'm gonna cut up the BMR-C1's!

4 x Link Depot 3 Pin Fan Power Y Cable
1 x COOLER MASTER R4-S2S-124K-GP 120mm Case Fan
1 x COOLER MASTER R4-SPS-20AK-GP 80mm Case Fan
1 x SilenX IXP-11-14 40mm Case Fan
1 x Noctua NT-H1 Thermal Compound
1 x Enzotech BMR-C1 VGA Cooler
1 x Enzotech BCC9 VGA Cooler

First PICs up of mod
Case Mods
http://www.overclock.net/13581088-post15038.html
Graphics Card Mods
http://www.overclock.net/13581313-post956.html
MB mods
http://www.overclock.net/air-cooling/1021873-m4a785-m-air-cooling-modifications.html
NH-D14 install
http://www.overclock.net/13581976-post1301.html
Edited by ryan w - 5/20/11 at 11:17pm
 
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post #18 of 29
Thread Starter 
Tested after improving cooling using mosfet heatsinks, more fans, and replacing asus factory thermal paste on NB/SB

first reset all BIOS settings to stock/auto to establish baseline then ran OC settings while adjusting LLC at 0,25,50,100 % to try to stabilize vdrop

OCCT test results:

CPUZ stock settings
CXbC0.jpg
vdrop at stock/auto BIOS settings
n9pAq.png
CPUZ OC settings
2JcAv.jpg
LLC at 50%
Xrptq.png
LLC at 100% = OCCT error (voltage to low)
qGQ81.png
LLC at 0%
qHk82.png
LLC at 25%
swiat.png

Conclusion:
25% LLC was best setting for achieving 1.45v goal -BIOS set at 1.465v. At 100% voltage drops to low for OCCT Test and errors, at 0% voltage seems to have less "regulation" and instead of decreasing under load raises under load on avg up to 1.5v. Interesting that prior tests before doing cooling mods would have caused processor power to be cut out at 1.5v but during this test that did not occur:D.

So now I will continue to to raise Ref Clock step by step and see how far I can go. Current OC BIOS settings are:
p4P2q.jpg
as well lowered memory back to stock 4-4-4-12 at 2.1V freg 800 as I am going to keep raising the Ref Clock I want to see how far I can push the lower latency compared to OC setting of 5-5-5-15 2.1v freq 1066.

comments, suggestions, otherwise is appreciated!
 
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post #19 of 29
Looks like it has been reduced from throttling to standard vDroop. Quite expected, many ASUS boards with 4-pin connectors have vDroop... however it's definitely a good thing VRM heat doesn't cause such purposely-induced throttling anymore.
post #20 of 29
Thread Starter 
it is the 4 pin connector that has this effect, I see, explains why the vdroop is there at stock settings, and not that I plan to push 1.5v but yes I was happy to see VRM anti fail not cause throttling, and will have to except the 0.03v drop
 
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Samsung Syncmaster T220HD Logitech K520 SILVERSTONE Strider Gold ST1000-G  Cooler Master CM 690 II Advanced  
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