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AMD Bulldozer and Piledriver Overclocking Guide - Asus Motherboard - Page 407

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post #4061 of 4065
Quote:
Originally Posted by Mega Man View Post

Why do people think llc is the only way to overclock.

Why do people think only one llc is the way to overclock?
Most just follow the guide. I know I did. Anyway, lots of other options too, like just pumping your vcore until it pops.
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Magicbox
(17 items)
 
crapbox
(13 items)
 
 
CPUMotherboardGraphicsRAM
FX 8320 Sabertooth 990FX Nitro+ RX480 Kingston HyperX Fury 
Hard DriveHard DriveHard DriveCooling
Samsung 850 EVO  Kingston HyperX 3K Seagate Barracuda 7200.14 Noctua NH-D15 
OSOSMonitorKeyboard
Kubuntu  Windows 10 Pro Dell U2515H CM Quickfire TK (Cherry Blue) 
PowerCaseMouseMouse Pad
Cooler Master Silent Pro M 850W Enthoo Pro Logitech G502 Logitech G440 
Audio
Xonar DX 
CPUMotherboardGraphicsRAM
Sempron 3300+ HP stock mobo (laptop) 200M (IGP) 2x1GB PC3200 
Hard DriveOptical DriveOSMonitor
100GB ATA133 DVD/CDRW Kubuntu 32 bit 14.1" (1280x768) 
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post #4062 of 4065
LLC is important for AM3 overclocking because the droop spec of AM3 is very loose.

That said, cranking LLC to a board's max setting is generally not the best approach. The key is to get the board so that droop and overshoot are both minimized. On some Gigabyte boards that means setting LLC to Medium, nothing higher or lower.
Quote:
Originally Posted by The Stilt 
The load-line specification for both AM3+ and FM2+ is extremely loose (1.3 mOhm & 2.1mOhm) and because of that the voltage droop by the specification is very large. To ensure that the operation parameters remain within a spec, an AM3+ part which draws 100A of current and requires 1.3000V to be fully stable must have at least 1.4300V default voltage (130mV droop @ 100A). Some of the motherboards are built to have lower Rll (< 1.3mOhm / 2.1mOhm) than the specification dictates, or the end-user might adjust it to be lower than the default value.

On AM4 the situation is significantly better, since the load-line spec. is less than half of what it was on AM3+.

For Zen the load-line appears to be (based on the existing VRM designs) significantly tighter than it was with previous AMD designs and much tighter than the Intel VR12 spec (which is already strict) specifies...
post #4063 of 4065
This is another reason for LLC, provided that it doesn't cause too much overshoot:
Quote:
Originally Posted by The Stilt 
A chip with low leakage characteristics not only requires higher voltage to operate, but is also able to withstand higher voltage levels. A high leaking specimen meanwhile requires less voltage to operate, but also can be killed by the same voltage levels a lower leaking specimen has no issues running at 24/7.

Chips with high leakage characteristics draw significantly more current (at lower voltage), which puts significantly more strain on the VRM than the low leakage specimens do (even at higher voltage). High leakage specimens also run significantly hotter. In fact the temperature through the whole system will be somewhat higher due the higher current draw (increased losses).

High leaking specimen = < 1.450V (sustained Vmax)
Low leaking specimen = < 1.525V (sustained Vmax)

Those are not official figures, however they are based on my own experience on >>200 different Piledriver CPUs. On most motherboards you will be VRM limited at or below those figures anyway.
With LLC off, the required voltage may be high enough to kill a very high leakage chip like the 9590 for a specific level of overclock. The question is whether or not any board's LLC can enable one to reach a higher overclock without overshoot becoming dangerous in terms of killing the chip. My assumption is that it's possible but that may not be accurate. At the very least, it seems that the time spent at the high voltages would be reduced with LLC.
post #4064 of 4065
I would like to thank you for your post ! I have a FX8300 on a M5A99FX and I am now at 4.7 GHZ with 1.415V (Yes I think i am lucky with my chip). My cooling is a H55 with a EK-Vardar FF5-120 (PWM 3000 RPM, don't worry it stays at 1500-1800 RPM when gaming) and With small FFT'S in prime 95 I get 68°C socket 62°C package. Prim Blend worked for 10 hours with no fails. I got a fan on the socket behind the mother board and over the VRM's.

I know surpassed 9590 with benchmarks and I7-6700K !!!! Wow. This chip can do so much ! I can't go over 4.7 Ghz since I need a bump on the Voltage and my small H55 can't hold it with that crazy fan can't hold it. I have 4 fans as intakes (2 front, 1 bottom, 1 front top), my h55 is intake in the middle top of the case and 1 exhaust in the back and 1 top back. I played with the fans many times and that is the best i could get for lower temps.
post #4065 of 4065
i as welll would like to thank the people which created THIS hell of a post ! biggrin.gif

perfect shot !!!! perfect guide !!! this is THAT guide what anyone can need and use !!! absolutly perfect !!!

found it yesterday ... and what should i say ... at the evening i could manage my rig to pass an standard intelburntest 10 times for a stable hit. thumb.gif

i did it with the fsb. i did two runs before with 280 und then with 275. both nearly the 5 ghz, slightly under....and both stable

and the last one with 277! (Bios: 4,986 GHz / Windows says: 5,004 min / 5,033 max)

cpu volt is 1,475
nb cpu volt 1,275
the cpu vdda is 2,575

and the cool i thing i did not know was that hint with the dimms ... anytime on every run at 1,5 volt ! smile.gif no xmp profile and no 1,65 volt like they prefer to say it should be default

the temps were at 64 on the cpu and always on 68/69 on the socket ... thats good for me to go ... its an 100% burn job... no game will load always at every time full all 8 cores to 100%

so the temps are ok ... not perfect ... but ok ... i wannted to get the most out of my hardware ... so i said to me : all under 65 degree on the cpu is fine for the IBT thing

the rest i set on the settings from page 1 here from this guide ... and then let the IBTest´s do theyre job.

for the records ... i started with 1,42 volt on the cpu and from start always with 1,275 volt on the cpu nb

pcie on 100mhz

the rest i will update when im at home .. right now i write this all out of my head tongue.gif i have to work today

then i will post screenshots/pictures and the test results from the IBT runs

...and maybe sorry for my english ... im a german biggrin.gif
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