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Haswell and ASUS Maximus VI Hero Z87 - G.Skill Ripjaws Z RAM Unstable Past 1600Mhz (2133Mhz Rated) - Page 3

post #21 of 24
Not familiar with Haswell, but based on your description of events, I'dtry uupping the vDIMM to 1.65v from 1.6v. I don't know what the different voltage deltas are for HW, but it would be wise to find out before changing anything.

Memory can be very picky with voltage. I just spent a better part of the day yesterday overclocking and benching, and I kept getting memory related BSODs after running a few bench runs with my Ripjaws Z 2133 9-11-10 @ 2450 10-12-10 using 1.685v, and it took me forever but it turned out that I was right at the voltage border, and DECREASING to 1.665v made everything stable!
I'm telling ya, RAM OCing can be weird!
   
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post #22 of 24
Quote:
Originally Posted by DJ_GLiTCH View Post

Hi everyone,

First of all, I just wanted to say that I've been impressed with Haswell so far. Everything is incredibly zippy and I'm finding it to be a solid performer.

However, I'm having a slight issue with the RAM and getting it to be stable at any speeds past 1600Mhz... The RAM is solid as a rock up to 1600Mhz, but as soon as I enable the XMP profile or manually set the timings, speeds, and voltages to what they should be (11-11-11-31-2T, 1.5V @ 2133Mhz) I get system instability and errors. The system performed perfectly when it was freshly booted after several 3DMark benchmarks, but after about 10 tests or so (was working my way from newest to oldest 3DMark's to compare the score with my previous setup) it forced a reboot. I then tried again and any intense benchmark caused it to crash all of a sudden. I then proceeded to run Memtest86+ (using the 5.0 RC1 designed for Haswell) and it showed a lot of errors after it hit about 2 minutes. I then tried loosening the timings, manual settings and voltages, auto, XMP default values (which should work straight up from what I have heard) but to no avail... Only 1333Mhz and 1600Mhz are stable. I can not for the life of me figure out how to get these speeds stable without worrying about blowing up my nice, new, and shiny system.

My core components are as follows:
CPU: Intel Core i7 4770 (non-K model, preferred the full set of features)
CPU Cooler: Thermaltake Water 2.0 Extreme
Motherboard: ASUS Maximus VI Hero Z87
RAM: 4x G.Skill Ripjaws Z 8GB 2133Mhz (F3-2133C11D-16GZL)
Power Supply: Cooler Master 700W Extreme Power

Something else, although probably irrelevant, my CPU temps are rather high... I understand Haswell runs hot, but I invested in a solid water cooler that should have brought these temps straight back down. My idle is rather good (although it is Winter in Australia at the moment) sitting at around 25 - 30 degrees Celsius give or take, but when performing Intel Burn Test or Prime95 I'm hitting up to 100 degrees Celsius. This is when I am using the Extreme setting on my cooler also. Does this sound normal? Or should it begin to lower as the CPU and thermal grease 'burn in'...? I've tried reseating also with Arctic Silver 5 (if my memory isn't misleading me) to try and eliminate that issue.

Thanks in advance to all for your suggestions and advice. It's greatly appreciated.

ps. I can usually only test computer settings after work each night, so I'm sorry if there's any delay in a quick response on the forum if one is needed. Oh, and I understand the memory isn't specifically the exact same one in the motherboard QVL, however the only difference was the one in the QVL was a 4 stick pack of the same sticks instead of 2x 2 stick packs. Completely identical otherwise, and I have still installed them in the correct pairs for each channel. It even states Z87 Compatible on the packaging now to reflect that.

Shld be no problem. ROG boards no issue on 4 dimm and 2 dimm populate. Only difference is usally a higher tRFC.
Do this.

1.Set to xmp profile.
2.Change in ure DRAM timings Maximus Tweak Mode 2.
3.Change Latency A/B to 14/14
4.Change this timings
DRAM Refresh Interval - 8319
Write Recovery (tWR) = 14
Read to Pre time (tRTP) = 9
Four Act Win Time = 32
tRDRD & tWRWR = 4
DRAM CLK Period = 14
Enable MRC recheck, disable fast boot, enable additional training.
5.Disable Full manual Voltage. Do not set any other voltages other than this
Just Change VCSSA ( System Agent Voltage ) +0.050
Change initial and eventual voltage to 1.7/1.75v
Vdimm = 1.5v ( from the spec sheet on ure ram)
6.In Digi Set Loadline to 6.

Run Prime 27.9v on Large fft.

Tweaking Reduce latency A/B. It doesnt have to be equal.
Reduce tRFC
Reduce Dram CLK Period.

**Note. Most of the options might be available in other bios versions but dont sweat it and just change on the settings u have.
Ure digital i/o should auto itself to +0.100. U can leave all digi, cpu power manage etc all in auto. Ure running a 4770 and not a k.
But on the other hand if ure gonna run IBT. then u would be better off setting ure vcore and cache voltage at 1.05v manual.

If ure having any bsod 124 up ure xtalk cancellation voltage to 1.1v. Its in tweakers paradise.
Edited by cstkl1 - 7/3/13 at 5:31pm
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post #23 of 24
My HERO was acting silly with my new Ripjaws memory (G.Skill) and I realized I had XMP #1 and XMP #2 in my UEFI/BIOS. One was 2399MHz the other was 2401MHz - all of the timings etc were the same IIRC. See if you have a couple of different XMP profiles on your memory and try each of them if you do smile.gif
post #24 of 24
DJ_GLiTCH,

Try manually setting DRAM Voltage to 1.50V.

For CPU System Agent Voltage, manually set it to 1.25V

then see how that works. This is with XMP enabled, so also check frequency and timings are correct.

Cheers
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Overclock.net › Forums › Components › Memory › Haswell and ASUS Maximus VI Hero Z87 - G.Skill Ripjaws Z RAM Unstable Past 1600Mhz (2133Mhz Rated)