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FX 8350 Sabertooth 990FX R 2.0 OC

 
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post #1 of 10 (permalink) Old 03-17-2019, 12:14 PM - Thread Starter
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FX 8350 Sabertooth 990FX R 2.0 OC

I'm still trying to summit "Mount Everest" for this combination i.e.: (4.8Ghz chip, 3000Mhz CPU/NB, 3000Mhz HT Link)

At the moment the system is running at 4.7Ghz chip with 2600Mhz CPU/NB, 2600Mhz HT Link.

Normally I wouldn't care much but I'm really trying to close this bottleneck as much as possible so that I can run a 21:9 1440p widescreen display at 120Hz with a gtx 1080ti ultra video settings without buying a new chip, motherboard, and ram also.

Anyone willing to help? I really don't want to have to dig up the proper voltages and multipliers in the official FX 8350 owners club.

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post #2 of 10 (permalink) Old 03-17-2019, 12:42 PM
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My 8300/8320 were unable to run 4.7ghz stable below 1.65vcore, but i think 8350 is better

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post #3 of 10 (permalink) Old 03-17-2019, 03:11 PM
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What ram kit are you running and at what speeds/timings?

FX8370E 5839mhz MSI 990FXA GD80 - custom water http://valid.x86.fr/3jk1vz
FX - 9370 @ 5740mhz MSI 990FXA GD-80 with an H-100 proof.gifhttp://valid.canardpc.com/s04jcj
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8350 @ 5.2 ghz on a stock cooler proof.gif PM me! smile.gif
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post #4 of 10 (permalink) Old 03-17-2019, 03:20 PM - Thread Starter
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2x 8GB Gskill Sniper Series DDR3 1866 PC3 14900 9-10-9-28

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post #5 of 10 (permalink) Old 03-17-2019, 03:30 PM
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You might be at about the limit of what you can do as far as NB speeds are concerned. Anything above 2600 is a pretty tall order on the ASUS boards. ( my experience is with CHV-Z's however)

Have you tried to hit 2133mhz on those sticks at those timings?

FX8370E 5839mhz MSI 990FXA GD80 - custom water http://valid.x86.fr/3jk1vz
FX - 9370 @ 5740mhz MSI 990FXA GD-80 with an H-100 proof.gifhttp://valid.canardpc.com/s04jcj
I like MSI motherboards and this is why smile.gif
8350 @ 5.2 ghz on a stock cooler proof.gif PM me! smile.gif
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post #6 of 10 (permalink) Old 03-17-2019, 05:02 PM - Thread Starter
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I just did, it won't hold, even with a safe bump in the voltage.

Oh well, it's a stable OC as-is with a simple 23.5 multiplier and 1.45V on the core.

Maybe I'll bump the voltage on the core a bit and see if I can push the chip up to 4.8-5.0Ghz as long as it stays under 60C load and keep the HT Link/CPU NB as is.

Not sure if the corsair liquid cooling as the nuts though.

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post #7 of 10 (permalink) Old 03-17-2019, 08:16 PM
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Quote: Originally Posted by instapeace View Post
I just did, it won't hold, even with a safe bump in the voltage.

Oh well, it's a stable OC as-is with a simple 23.5 multiplier and 1.45V on the core.

Maybe I'll bump the voltage on the core a bit and see if I can push the chip up to 4.8-5.0Ghz as long as it stays under 60C load and keep the HT Link/CPU NB as is.

Not sure if the corsair liquid cooling as the nuts though.
I had an 8350 on an H-100 that would game at 5.1ghz with the GD-80, but they are a bit cooler running that ASUS boards I have.

4.9 ghz for prime or ibt testing is about the limit however.

FX8370E 5839mhz MSI 990FXA GD80 - custom water http://valid.x86.fr/3jk1vz
FX - 9370 @ 5740mhz MSI 990FXA GD-80 with an H-100 proof.gifhttp://valid.canardpc.com/s04jcj
I like MSI motherboards and this is why smile.gif
8350 @ 5.2 ghz on a stock cooler proof.gif PM me! smile.gif
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post #8 of 10 (permalink) Old 03-17-2019, 08:48 PM
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what are all your voltages, LLC settings, and vrm frequency settings?


VRM frequency is a big help for core and northrbidge clocks.


As long as I kept things cool, I could run above 2900mhz northbridge with nearly 2500mhz ram (2400 CL10 kit from gskill did its 2400mhz at 1.59volts, and ran above 2500mhz with 1.66v)




VDDA should always be considered when doing core and NB clocks, but too far will blow teh chip out the water and render it useless for strong clocks. I usually settle on max of 2.65 as a daily use,


NB chipset voltage will require an increase to run very fast northbridge. default 1.1, I have ran upwards of 1.225. ramp slowly, the first 0.05v is the easiest to see a result. After that, above 1.15 is hard to figure out if worth it or not.
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post #9 of 10 (permalink) Old 03-18-2019, 12:25 PM - Thread Starter
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CPU Manual Voltage 1.45v
CPU/NB Manual Voltage 1.25v
CPU VDDA Voltage Auto/2.513v
DRAM Voltage 1.525v
NB Voltage Auto/1.110v
NB HT Voltage 1.25v
NB 1.8V Voltage 1.855v
SB Voltage Auto 1.10v
VDD PCIE Auto/1.10v
VDDR Auto/1.20v

CPU Load Line Calibration Ultra High
VRM Fix Frequency Mode 400


Last edited by instapeace; 03-18-2019 at 12:31 PM.
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post #10 of 10 (permalink) Old 03-19-2019, 04:44 PM
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Set CPU LLC to HIGH instead of very high. causes a lot of unnecessary spiking of temps and voltage.


Temporarily set cpu vcore to 1.5, and do a little stress testing, bringing it down, hopefully to around 1.475 or lower.


Your motherboard should offer 450kHz vrm, well, my brothers saber does (not sure if its a REV 2.0 liek yours)


NB 1.8v can be set to default 1.8, only heavy chipset over voltages require a higher 1.8 due to voltage sag (many share same SOURCE, hence why balancing is sometimes necessary).


NB HT voltage looks fine.


With 2600mhz northbridge clock, Id say cpu-nb voltage should be closer to 1.3, but if it is stable, than you can leave it. Bump it a hair upwards if unsure. This voltage stabilizes a lot of things. northbridge frequency, ram, and core overclocks. (faster northrbidge means talking with both ram and cores faster, hence higher requirement)




I have had to bump cpu-nb in past PURELY on core overclocks alone, even with a 2200mhz NB and 1333mhz ram. It is one of the many reasons why many OC guides recommend one component at a time for testing, outside the obvious limiting of variables






Ultimately, Id recommend starting purely with lowering LLC to high, and figuring out the new required vcore. Your idle voltage will be higher no matter what, but you want the LOAD voltage to be near idle voltage, or a little lower. vdroop under load means you can dial in exactly what you NEED, while still maintaining stable idle voltage.




Very High LLC means idle voltage is much lower than load, and can lead to very random instability, as spikes of activity can cause a lock up or reboot.
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