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Overclocking 980x - Page 4

post #31 of 52
Thread Starter 
Quote:
Originally Posted by mymlan View Post
The beauty of RAM is the interchangability between frequency and timings. Now that you're stable, try bumping your BCLK 1-2mhz at a time. You may also experiment pushing your timings down to 7. I'm glad to hear it's stable. Understand that RAM at 1600 cl7 is faster than 2000 cl9.

Edit: Be assured that you do not waste your money running your RAM at 1600Mhz. The high binning of your sticks will allow for far lower timings than cheaper RAM.
Thanks mym.

So then what is the logical reasoning for boosting the frequency of RAM when RAM at 1600 is faster than RAM at 2000? Are you saying that RAM at 1600 is faster when the timings are lower than RAM at 2000 if the timings are higher? That makes sense but then why would anyone want 2000?

I assume CL7 is 1600 at 7 CAS and CL9 is at 9 CAS?

Also, is my RAM safe to run at 1.656v? It's giving me the "RAM IS NOT SAFE ABOVE 1.65" in the BIOS but the next lowest is like 1.644v?
post #32 of 52
Quote:
Originally Posted by xyeLz View Post
Thanks mym.

So then what is the logical reasoning for boosting the frequency of RAM when RAM at 1600 is faster than RAM at 2000? Are you saying that RAM at 1600 is faster when the timings are lower than RAM at 2000 if the timings are higher? That makes sense but then why would anyone want 2000?

I assume CL7 is 1600 at 7 CAS and CL9 is at 9 CAS?

Also, is my RAM safe to run at 1.656v? It's giving me the "RAM IS NOT SAFE ABOVE 1.65" in the BIOS but the next lowest is like 1.644v?
It highly depends on the applications you are running. Some take more advantage of higher speed, hence higher bandwith, but in general 1600MHz CL7 (CAS latency 7 as you well said ) gives you better performance than 2000Mhz at CL9/CL10. If you can push your RAM to 1600 or 1680 at CL7 you will be better of than 2000 at CL9.

About the system crash with RAM at 2000MHz, did you try to increase the QPI/NB voltage a bit? to 1.4V for example and test stability?

Your BIOS will alert you to many voltages going over the general spec. Generally, DDR3 RAM stick run at 1.65V or less, so your BIOS will alert you to the danger of damaging the hardware with gigher volts, but you should be OK with a small increase, your KIT will handle it fine. There are Kits running at 1.8V...

mymlan, higher volts than 1.3 in IOC/ICH may damage your board, like a too much volts increase on the CPU or QPI/NB. Even if you have your board cooled on water the volts are likely to damage it, is a risk you're incurring to.
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post #33 of 52
Thread Starter 
Right now I'm running 1.643v for my DRAM. QPI is at 1.35. Everything else is as stated earlier except IOH which is at 1.2 for now.

I am taking an approach that mym mentioned earlier. Right now I am at 184 BCLK which I believe puts the RAM at 1844 and the uncore at 2766 and the CPU at 4.056GHz.

Are you sure it will be safe to run my RAM at 1.656? I know I didn't buy cheap RAM but the voltage makes me angry because it's either 1.643 or 1.656? =/
post #34 of 52
You'll be safe, don't worry. your RAM is supposed to run at 1.65V, if you only have the option to run it at 1.643 or 1.656V you won't be damaging it with that low increase in voltage
At 1844 you should be capable of getting latencies of 8 with it. What are its latencies of now? You may also drop a little the voltage and set them to run with CL9.

Higher than 1.656V you should only set it if you want to run them at 2000 CL8, or 2200 CL9/CL10.
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post #35 of 52
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Quote:
Originally Posted by matroska View Post
You'll be safe, don't worry. your RAM is supposed to run at 1.65V, if you only have the option to run it at 1.643 or 1.656V you won't be damaging it with that low increase in voltage
At 1844 you should be capable of getting latencies of 8 with it. What are its latencies of now? You may also drop a little the voltage and set them to run with CL9.

Higher than 1.656V you should only set it if you want to run them at 2000 CL8, or 2200 CL9/CL10.
Okay I'll try running it at 1.656v.

I definitely don't want to damage my RAM so I don't think I should go higher, do you?

Of the choices you offered me at 1.656, which would offer the most performance increase? 18xx at CL8 or 2000 at CL9?

EDIT: Also, I increased my IOH to 1.3v for this. Should I have done that? Does this affect my GPU because they're idling at 35 now when before they were at 30-32?
post #36 of 52
I don't think you'll need to go higher than 2000, unless you want to know the limitations of your sticks. 18XX CL8 should have a little advantage over 2000 CL9. from 1600 up you don't really notice that much difference in real world applications. Benchmarks will notice, but while gaming or video editing you won't notice at all... From CL9 to CL7 you may notice a little more. i am not sure that you will be able to run them at 1800 CL8, i just believe that they can do that, but there is nothing like test them

You should only increase IOH voltage if you are experiencing instability caused by the dual GPU setup. i don't believe it should directly affect the GPUs temps, but the case temp should be a little higher now, and that may be the cause for the temps increase on the gpus. More voltage on the board's chips and circuits will lead to more heat on the board, and so the case temp will rise a little.
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post #37 of 52
It's far better for the majority of users to lower their RAM frequencies for timings as it lessens the strain on the Uncore, hence allowing lower QPI voltage and thereby allowing for a higher CPU frequency. Don't get too caught up at running your sticks at 2Ghz you'll find far more benefit pushing your TDP towards the core, especially considering the weak IMC in the 980x.
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post #38 of 52
Thread Starter 
I know it gets really annoying to help me but thanks for sticking with me. I really appreciate you for hanging in there.

Here's another crash at my current specs:

BLUESCREEN: 4E

BCLK: 188
Multiplier: 22x
CPU Frequency: 4.145

DRAM Frequency: 1884
Timings: 9-9-9-24
Voltage: 1.643

I just increased the voltage to 1.656 so we will see if that fixes my error for now. I also just lowered the IOH back to stock (1.11) so hopefully that won't affect anything. My GPU temps are back down to 32-33 (for now). Will update if it changes back.

Any suggestions on that blue screen?

So I won't really notice a difference if I'm at 2000 CL10 than at 1800 CL9 or 1600 CL8/7? I would like the best performance in games without going over voltage.
post #39 of 52
Thread Starter 
Quote:
Originally Posted by mymlan View Post
It's far better for the majority of users to lower their RAM frequencies for timings as it lessens the strain on the Uncore, hence allowing lower QPI voltage and thereby allowing for a higher CPU frequency. Don't get too caught up at running your sticks at 2Ghz you'll find far more benefit pushing your TDP towards the core, especially considering the weak IMC in the 980x.
This may sound stupid but what is TDP?

So you're suggesting running at 1600 and tighter timings than at 2000 and higher timings?
post #40 of 52
TDP refers to temperatures you have to cool. More volts = more TDP. Your RAM is much more than is required for gaming. On that note, past 1.6Ghz, timings matter more than frequency.

P.S. You don't need more than 1.2v on your IOH.
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Leviathan
(13 items)
 
Workstation
(10 items)
 
Alexandria
(11 items)
 
CPUMotherboardGraphicsRAM
i7 980X @ 4.3 HT on Asus P6T Deluxe V2 Radeon 5970 + GT 240 PHYSX Corsair 12gb (horrible) 
Hard DriveOSMonitorPower
64GB SSD boot + Raid 10 WDC Blues Pirated Win 7 (duh) Alienware AW2310 Corsair AX1200 
Case
Antec 902 Modded 
CPUMotherboardRAMHard Drive
Xeon E3-1265L V2 Asus P8C WS Kingston 32GB 1600MHz ECC Crucial M4 256GB 
CoolingOSPowerAudio
Corsair H50 ESXi 6.0RC Corsair HX1000 Focusrite Scarlett 18i20 
Other
Mellanox MNPA19-XTR 
CPUMotherboardGraphicsRAM
Dual Intel Xeon L5630 Supermicro X8DTH-6F Radeon 7750 64GB 1066MHz Registered DDR3 
Hard DriveHard DriveCoolingOS
4 x 4TB Hitachi SAS Ultrastar Crucial M4 256GB Dual NH-U9DX i4 vSphere 6.0RC 
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Corsair AX1200 Norco RPC-4220 Mellanox MNPA19-XTR 
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