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*Official* Intel DDR4 24/7 Memory Stability Thread - Page 37

post #361 of 4619
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Quote:
Originally Posted by error-id10t View Post

That's interesting.. I was just checking what I was getting and noticed that my trefi had gone up from 10300 to 11440 and the only thing changed is the "new" microcode 74 and it also gives a repeatable improvement across the board on L2. That's of course much less than doubling the whole value though.


Assuming you're running the same memory frequency as you were before?
post #362 of 4619
Quote:
Originally Posted by Yuhfhrh View Post

That's interesting.


It's because increasing tREFI results in fewer DRAM refreshes over a given time interval. During refresh, memory is not available for read/write operations. Therefore, a longer refresh interval allows more IO over the bus. That's the upshot. The downside to a longer refresh interval is increased chance of data corruption. DRAM cells lose charge over time. A periodic refresh recharges the cells to ensure adequate levels for the stored data.
Edited by Raja@ASUS - 1/20/16 at 6:07am
post #363 of 4619
Quote:
Originally Posted by Silent Scone View Post

It would mean more load is being placed on the CPU but I doubt this would have much affect on the test. Probably best not to do this, if it's the lack of HDD that is the problem for ease of access to the OS probably better to use a USB device. If people want to see if they can mimic instability and stability with both methods that would be worth knowing, but only if majority of memory can be allocated.

I'll give it a shot once I've sorted out Hyper-V. Will see how it goes. smile.gif
post #364 of 4619
Quote:
Originally Posted by Raja@ASUS View Post

It's because increasing tREFI results in fewer DRAM refreshes over a given time interval. During fefresh, memory is not available for read/write operations. Therefore, a longer refresh interval allows more IO over the bus. That's the upshot. The downside to a longer refresh interval is increased chance of data corruption. DRAM cells lose charge over time. A periodic refresh recharges the cells to ensure adequate levels for the stored data.

Thanks Raja. Do you think HCI memtest or GSAT would/could uncover the dram cell dissipation thing? dram temps only hit 30 or so, maybe at higher temperatures this would fail. redface.gif

_________________________
@silent scone

overnight HCI:


and kept AID64 stability open, but not running in the background:

Edited by Jpmboy - 1/20/16 at 6:02am
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post #365 of 4619
Maybe i do something wrong but these images are soo low quality i can not read them :/


Also i have question in regards to CL timing vs tRFC. At what point will the extra loose tRFC just nullify the low (performance ram timing) CL clock? IE 3200Mhz @ 14-14-14-34-560 vs 2800Mhz 16-16-16-38-200? Is the 14 going to be alot faster even tho the tRFC is way loser? I just feel like why bother with lower CL if you have to have a much higher tRFC? Does tRFC really have that little of a effect on latency?
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post #366 of 4619
Quote:
Originally Posted by Formula383 View Post

Maybe i do something wrong but these images are soo low quality i can not read them :/


Also i have question in regards to CL timing vs tRFC. At what point will the extra loose tRFC just nullify the low (performance ram timing) CL clock? IE 3200Mhz @ 14-14-14-34-560 vs 2800Mhz 16-16-16-38-200? Is the 14 going to be alot faster even tho the tRFC is way loser? I just feel like why bother with lower CL if you have to have a much higher tRFC? Does tRFC really have that little of a effect on latency?


after clicking the image, click the "Original" button. Or rt-click>open in a new tab



why would you run 560 at 2800??
Edited by Jpmboy - 1/20/16 at 6:32am
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post #367 of 4619
I'm running DDR4 at voltage 1.568

Is there really any risk at 24/7 desktop usage ?

Max temp under stress test goes to 50c

This ram can boot with 1.9v for superpi test.

Ram cost is not so expansive and I've never heard of ddr4 being burnt at less than 1.6 yet

so why is it everyone is staying under 1.4 ?
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post #368 of 4619
Quote:
Originally Posted by dhaine View Post

I'm running DDR4 at voltage 1.568

Is there really any risk at 24/7 desktop usage ?

Max temp under stress test goes to 50c

This ram can boot with 1.9v for superpi test.

Ram cost is not so expansive and I've never heard of ddr4 being burnt at less than 1.6 yet

so why is it everyone is staying under 1.4 ?

Is there acceptable risk, that's the question and I think you answered it for yourself.
Intel's max XMP certification for DDR4 is 1.5V and their risk is not the ram sticks per se - right?
Edited by Jpmboy - 1/20/16 at 6:56am
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post #369 of 4619
Quote:
Originally Posted by Jpmboy View Post

Thanks Raja. Do you think HCI memtest or GSAT would/could uncover the dram cell dissipation thing? dram temps only hit 30 or so, maybe at higher temperatures this would fail. redface.gif

]

This depends on how frequently the data is written to and read from DRAM. A good test should feature patterns that result in sufficient idling between banks at some point. Other than that, I suppose one can use day-to-day apps after the stress test has passed (assuming tREFI is the only thing that was changed).
post #370 of 4619
Quote:
Originally Posted by Raja@ASUS View Post

This depends on how frequently the data is written to and read from DRAM. A good test should feature patterns that result in sufficient idling between banks at some point. Other than that, I suppose one can use day-to-day apps after the stress test has passed (assuming tREFI is the only thing that was changed).

lol - on going. redface.gif
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Seiki 4K AOC 1080P Ducky Cherry Black Silverstone 500W SFX form factor/ Seasonic 760W 
CaseMouseAudio
Bench Logitech G700s Ultimate Ears TF10s 
CPUMotherboardGraphicsRAM
i7 4960X @ 4.7 Asus Rampage IV Black Edition R9 295x2 w/ Koolance Block G Skill 2400 c9 (@ 2133c8) 
Hard DriveHard DriveHard DriveHard Drive
Plextor 512 SSD VelociRaptor 600GB WD Black 2T 4 Terabyte NAS 
Optical DriveOptical DriveCoolingCooling
Asus BluRay R/W Lite On  AquaComputer 720XT Koolance 380i 
CoolingOSMonitorKeyboard
Liang DCC Aux Pump Win10x64 Samsung U28D590 4K/60 (primary) SteelSeries G6 (Cherry Red) 
PowerCaseMouseAudio
Corsair AX1200 Sliverstone TJ09 G700 on-board 
Audio
Ultimate Ears TF10s 
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x99
(28 items)
 
z170/z270
(27 items)
 
x79
(21 items)
 
CPUCPUMotherboardGraphics
i7 5960X i7 6950X Asus Rampage V Extreme (STD and model-10) 2 GTX TitanX w/ EK Blocks & Backplates 
GraphicsGraphicsRAMHard Drive
Nvidia Tesla C-class 2 GTX Titan X Pascal (water cooled) GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 
Hard DriveHard DriveHard DriveOptical Drive
Plextor 256GB M6e M.2 2x Plextor SSD 256 Raid 0 (Win 7) Samsung NVMe 950 Pro M.2 Plextor 810 
CoolingCoolingCoolingCooling
Aquacomputer GiGant 1680 (4x420) external Rad XSPC RX360 Koolance 380i Laing DDC-1T (2) 
CoolingOSOSOS
Koolance EXC-800 Chiller Windows 10 x64  Windows 7 Pro Linux Mint 
MonitorMonitorKeyboardPower
ASUS Swift 1440P 144Hz Seiki 50" 4K monitor (720P-2160i) 240-30Hz Das Keyboard Model S Pro Corsair AX1500i 
CaseMouseAudioOther
MicroCool Banchetto 101 Steelseries Rival Ultimate Ears TF10 Koolance Pump/Fan Controller 
CPUCPUCPUMotherboard
i5 6600K i7 7700K i3 7350 ASUS Max iX APEX, Asrock MOCF, M8Impact 
GraphicsGraphicsGraphicsRAM
ASUS GTX 1080 Turbo ASUS GTX 960 Mini EVGA GTX 550Ti G.Skill 3600c15 
RAMHard DriveHard DriveHard Drive
G.Skill 4266c19 Samsung SM951 WD VR 300 Intel 750 NVMe U.2 
Hard DriveHard DriveOptical DriveCooling
Mushkin 512 Intel 600 NVMe Raid0 Plextor DVD ROM Custom Water (Koolance 380i / XSPC 360v2) 
CoolingOSOSOS
Corsair H80iV2 (M8I) Windows 10 Pro Window 7 Linux Mint 
MonitorMonitorKeyboardPower
Seiki 4K AOC 1080P Ducky Cherry Black Silverstone 500W SFX form factor/ Seasonic 760W 
CaseMouseAudio
Bench Logitech G700s Ultimate Ears TF10s 
CPUMotherboardGraphicsRAM
i7 4960X @ 4.7 Asus Rampage IV Black Edition R9 295x2 w/ Koolance Block G Skill 2400 c9 (@ 2133c8) 
Hard DriveHard DriveHard DriveHard Drive
Plextor 512 SSD VelociRaptor 600GB WD Black 2T 4 Terabyte NAS 
Optical DriveOptical DriveCoolingCooling
Asus BluRay R/W Lite On  AquaComputer 720XT Koolance 380i 
CoolingOSMonitorKeyboard
Liang DCC Aux Pump Win10x64 Samsung U28D590 4K/60 (primary) SteelSeries G6 (Cherry Red) 
PowerCaseMouseAudio
Corsair AX1200 Sliverstone TJ09 G700 on-board 
Audio
Ultimate Ears TF10s 
  hide details  
Reply
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