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Need some tips on overclocking my 1055T/Sabertooth 990FX

post #1 of 10
Thread Starter 
Hello all,

I used to have an M4A87TD Evo, but the VRMs were getting hot and it was throttling at stock speeds. It was very aggravating seeing the Core temperature at 37C, and yet it throttles back to about 800mhz.

So I got a Sabertooth 990FX. It's got a pretty BIOS. smile.gif Right now I'm running 3.75ghz thumb.gif But I could use some tips on how to get it further.

http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/43653-asus-sabertooth-990fx-am3-motherboard-review-7.html

My settings are:
Manual Overclock
14.0x Ratio
TurboCore - Off
FSB 266mhz
Memory - ~1440mhz
(4x4GB 1600mhz Corsair - 1T, though thumb.gif)
CPU/NB ~2400mhz (is higher better or worse for this?)
HT Link - ~1980mhz
Spread Spectrum - Off
CPU LLC - High
CPU/NB LLC - High
CPU Current - 100%
CPU/NB Current - 100%
CPU Power Phase - Extreme
(what does this do exactly?)
CPU Voltage - 1.4375v
RAM Voltage - 1.65v
Other Voltages - Auto


This gets me 3.75ghz stable on 6 cores. According to Speedfan and the Asus temperature monitoring software, Cores 0-5 load at around 55C. "CPU" reads 68-70C. That seems a bit high to me, but I can't do anything about it without better cooling. I've got a single radiator Coolit Eco. ( http://ncix.com/products/?sku=50327 ) Anyway, what can I tweak to go higher without burning my CPU up? smile.gif

Oh yeah, my core voltage reads 1.43v or 1.44v on load.
     
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post #2 of 10
Temp wise your at your limits, or real close to it. If your asking if cooling wasn't an issue what could you do, than I'd ask if prime95 fails at any higher settings?

You're at that point where you'll start needing additional NB voltage (not CPU/NB) to help stabilize the Ref Clock as you go higher. Might need a little increase to the HT voltage as well.

You'll see bigger performance gains if you could raise the NB Freq, (yes, higher is better) but once again you're at your limit temp wise now and the added CPU/NB voltage will only make it hotter (just not as much as if you raised the Vcore). You could attempt to increase NB Freq and watch temps closely.

Over all it doesn't look like you can much more without a better cooling solution. You may be able to tighten Ram without adding to temps.
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post #3 of 10
I would re-seat that cooler because your temps should be lower at 1.43v. Also what kind of thermal paste did you use? You know what to get if you used the stock pad lol. get that NB freq >2600Mhz you shouldn't need to raise the voltages on that.
Quote:
CPU LLC - High
CPU/NB LLC - High
CPU Current - 100%
CPU/NB Current - 100%
This is most likely the culprit...see if you can get the LLC down one level and those Currents to like 80%. You may have to add a bit more juice on the CPU alone but that will make the CPU cooler do it's job,. because right now the board is heating up and with a closed water loop it can happen on your install because you just dont think about air flow.
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post #4 of 10
Thread Starter 
Quote:
Originally Posted by The Sandman View Post

Temp wise your at your limits, or real close to it. If your asking if cooling wasn't an issue what could you do, than I'd ask if prime95 fails at any higher settings?
I cranked the voltage briefly and hit 3.95ghz - Windows booted, but Prime95 was definitely not stable.
Quote:
Originally Posted by The Sandman View Post

You're at that point where you'll start needing additional NB voltage (not CPU/NB) to help stabilize the Ref Clock as you go higher. Might need a little increase to the HT voltage as well.

You'll see bigger performance gains if you could raise the NB Freq, (yes, higher is better) but once again you're at your limit temp wise now and the added CPU/NB voltage will only make it hotter (just not as much as if you raised the Vcore). You could attempt to increase NB Freq and watch temps closely.
Alright. Thanks for the tips. smile.gif
Quote:
Originally Posted by The Sandman View Post

Over all it doesn't look like you can much more without a better cooling solution. You may be able to tighten Ram without adding to temps.
I'll work on that. I think these chips chow down on 140+ watts, so I'd need quite the cooling solution... I've got a launch-day 1055T (Cost about $180 at the time - was $230 on Newegg biggrin.gif Back then a comparable i5 was in the $260+ range)
Quote:
Originally Posted by PROBN4LYFE View Post

I would re-seat that cooler because your temps should be lower at 1.43v. Also what kind of thermal paste did you use? You know what to get if you used the stock pad lol. get that NB freq >2600Mhz you shouldn't need to raise the voltages on that.
AS5 - but I think my tube is a few years old by now.

Even so, a bigger issue is probably the dust buildup in the rad. redface.gif
Quote:
Originally Posted by PROBN4LYFE View Post

Quote:
CPU LLC - High
CPU/NB LLC - High
CPU Current - 100%
CPU/NB Current - 100%
This is most likely the culprit...see if you can get the LLC down one level and those Currents to like 80%. You may have to add a bit more juice on the CPU alone but that will make the CPU cooler do it's job,. because right now the board is heating up and with a closed water loop it can happen on your install because you just dont think about air flow.
I've dropped the LLC back down to see what happens. Voltage went down to 1.4/1.39v under load... still waiting to see whether it's stable or not. CPU temp has only hit 68C so far. (55C on the cores)

100% current is the lowest setting. They go up to 140%. But I wouldn't do that without serious cooling power. (TEC, probably)
     
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post #5 of 10
If it's of any use, when I test with Prime95 I follow these two rules.
If you get a BSOD it's usually a lack of Vcore.
If you get a "Worker Has Failed" error (some call this a rounding error) where one or more cores stop working this is usually a lack of Dram voltage, or CPU/NB voltage.

With a locked multiplier sometimes you'll also have to adjust these rules slightly. A little info here, when the Ref Clock gets much above 260-270MHz is the point where you'll need to manually enter the NB voltage as mentioned above (very probable HT voltage too) but I adjust these after the first two rules don't seem to improve things. Make sense?

One more item to realize would be that by having all four dimms occupied (4 x 4GB) will reduce some of the OC ability, mainly memory Freq and max NB Freq may not go as high as if you only had two slots full. I would think you'd be able to get closer to the 1600MHz or even slightly above on stock timings. If your ref clock setting is forcing you to go low than deff try to tighten them and take full advantage of the lower freq (1440MHz). You'll see the 1600MHz range again when you get the ref clock up to 315MHz or so. I forget the exact number but you get the idea. That's when things get interesting and really start to move lol.
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post #6 of 10
Thread Starter 
I doubt I can get my RAM much higher. The next divider puts it at 1800mhz. I can bump my FSB, but it doesn't seem to want to go much past 275mhz - I probably have to increase the voltage on something.

I'll keep tinkering tomorrow. Tightening RAM timings is not a problem - but figuring out how much to loosen them (for more mhz) is. I'll probably just tighten them.

Edit: Dropping the LLC seems to have made a huge difference for temps. My cores are at 53C right now... CPU reads 66C. Voltage is jumping around between 1.37-1.38v. I'm off to sleep - I'll find out if it's stable or not in the morning.
Edited by Kramy - 2/11/12 at 5:59am
     
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post #7 of 10
Thread Starter 
Well, it's at least ~8 hours stable. That's something. I guess LLC isn't really required? Right now I'm at 51C on the cores, 65C on the CPU, and voltage is bouncing between 1.37 and 1.38. Looks reasonably good to me.

If I wanted to try cranking my RAM mhz, what timings would I need to adjust? Obviously 1T goes to 2T, but what else?

http://images.hardwarecanucks.com/image/mac/reviews/asus/Sabertooth990FX/sabertooth990fx_85.jpg
http://images.hardwarecanucks.com/image/mac/reviews/asus/Sabertooth990FX/sabertooth990fx_86.jpg

Keep in mind the next divider available puts it at 1800mhz... I'd have to go fairly loose.
     
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post #8 of 10
Quote:
Originally Posted by Kramy View Post

Well, it's at least ~8 hours stable. That's something. I guess LLC isn't really required? Right now I'm at 51C on the cores, 65C on the CPU, and voltage is bouncing between 1.37 and 1.38. Looks reasonably good to me.

If those voltages and temps are under load I agree, good job!


If I wanted to try cranking my RAM mhz, what timings would I need to adjust? Obviously 1T goes to 2T, but what else?
http://images.hardwarecanucks.com/image/mac/reviews/asus/Sabertooth990FX/sabertooth990fx_85.jpg
http://images.hardwarecanucks.com/image/mac/reviews/asus/Sabertooth990FX/sabertooth990fx_86.jpg
Keep in mind the next divider available puts it at 1800mhz... I'd have to go fairly loose.

Yes I realize at a 275MHz ref clock that's where you'll be for Dram Freq. I was trying to suggest that if possible, attempt a ref clock of 300MHz or so till you have a freq closer to 1600MHz +/- using the next lower Dram multiplier and adjust all the other multipliers accordingly to achieve your goals. You have to find that point where the ref clock and other multipliers balance out to something you can use.

You mentioned that your Sabertooth won't go higher than 275MHz? That sounds very odd to me. Have you ever isolated just the HTT OC (Ref Clock) separate from everything else? Try doing this with everything else (CPU,HT, NB Freq and Dram) as close to stock as possible and find the max "useable" stable Ref Clock range for your hardware/OC. Useable being that point where you have a few usable options for your hardware that are in balance and not so strange like having to run 1440MHz Dram Freq. With this new ref clock freq you would basically start your OC over by starting with just adding the CPU and so on. You have to think ahead a little when looking for a HTT range. My bios will show the increases in real time (I believe yours would be the same) and this makes it easy to at least see a list of all the settings at any given point so you know where things are at. Than you have a new goal by adding everything back into the new ref clock freq. Hope this make sense.

With Dram you'll find AMD will perform much better with tighter timings rather than higher freq. This is why I suggested tightening at your current 1440MHz Dram freq. If it doesn't tighten at least try a slightly higher HTT to get closer to 1600MHz. It's a little trail and error but you did ask for suggestions lol. This is what I would do.

Give this a looking at if you haven't seen it yet on "How To Tighten" Dram http://www.overclock.net/t/809889/amd-overclocking-timing-guide
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post #9 of 10
Sabortooth's ref clock will go up to 600 MHz thumb.gif
post #10 of 10
Thread Starter 
Thanks for the link, Sandman. smile.gif

Okay, I still can't break 275mhz. Even 270mhz is unstable. I tried bumping up my CPU, CPU/NB, and NB voltages. I lowered my CPU multi and RAM speed and NB frequency, but I still can't get past ~270mhz. Am I missing anything, or is my 1055T not capable of going further?

Also, I checked the "Auto" voltages in the BIOS - WOW. They're insane. Under load on "Auto" the CPU voltage goes well past 1.5v.
     
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Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
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Seagate 2TB - ST2000DM001 WD 640GB Black - WD6401AALS Seagate 6TB - ST6000DM001 Micron M500 - MTFDDAK480MAV 
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Pioneer DVR-115DBK Samsung SH-S243D/BEBE LG GH22NS90 Lite-On EBAU108 External DVD 
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FX-8350 @ 4.6ghz 1.425v Sabertooth 990FX Zotac GTX 1070 Amp! 32GB (4x8GB) Kingston Fury 1866mhz CL10 1T 1.5v 
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Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
Hard DriveHard DriveHard DriveHard Drive
Seagate 2TB - ST2000DM001 WD 640GB Black - WD6401AALS Seagate 6TB - ST6000DM001 Micron M500 - MTFDDAK480MAV 
Optical DriveOptical DriveOptical DriveOptical Drive
Pioneer DVR-115DBK Samsung SH-S243D/BEBE LG GH22NS90 Lite-On EBAU108 External DVD 
CoolingCoolingCoolingOS
Noctua NH-D15 Fractal Design 140mm Fan - FD-FAN-140 Fractal Design 120mm Fan - FD-FAN-120 Windows 7 
OSMonitorMonitorKeyboard
Ubuntu 14.04 LTS Samsung 2343BWX 23" (2048x1152) BenQ GW2765HT 27" IPS LCD Monitor (2560x1440) Genius Keyboard KB-G235 PA 
PowerCaseMouseMouse Pad
Seasonic Platinum 1000w PSU - SS-1000XP Fractal Design Define R5 Steelseries Rival 6500 dcpi Mousepad + Desk 
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Onboard Realtek® ALC 892 Cyber Acoustics CA-2992 2.0 Speakers Razer Krait 1600 DPI nGear G-C1601 Card Reader 
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VIA Eden C7 1200mhz Jetway J7F4K1G2ES-LF VIA Onboard 512MB PC2-4200 
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