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Memory tweaking for n00bs?

post #1 of 4
Thread Starter 
After getting my cpu stable, I wondered if there would be any gains to be had from tweaking my memory settings.

My rig is as follows.
Intel Core i5-2500K Sandy Bridge-DT XE with Alpenföhn Matterhorn Pure Edition CPU Cooler @ 4.5GHz
Asus P8Z68- V LX, Intel Z68
8GB Crucial Ballistix DDR3 PC3-12800 BLS2CP4G3D1609DS1S00CEU
MSI GTX 660 OC Twin Frozr
Hiper Modular PSU

Link to Crucial site,
http://www.crucial.com/uk/store/partspecs.aspx?imodule=BLS2CP4G3D1609DS1S00CEU

And my memory settings as of now.


Any suggestions for any tweaks?
TIA.
Edited by jotto - 1/15/13 at 12:04pm
post #2 of 4
There is a lot of things you can try.
I would start by setting the memory to DDR3-1866 or DDR3-2133 and checking stability with the same sort of timings and more voltage (1.65 ish). If it fails - you could try tightening the primaries at DDR3-1600 to 8-8-8 or 7-7-7.
post #3 of 4
Sandy Bridge and Ivy Bridge wubsmiley.gif High Speed Memory, while AMD seems to prefer tighter timings. Now, this is not ALWAYS true, as AMD's APU's have shown significant benefits from higher speed memory.

IN GENERAL, you will want to shoot for the highest SPEED possible, even if you have to loosen your timings a bit.

Here is what I'd aim for:
VOLTAGE: No more than 1.65v (+/- 10%)

Try going to 933Mhz (for DDR3-1866) with 10-10-10-30. That's a very relaxed set of timings, and you should be able to hit it without issue. Increase voltage as needed.

If you can get 1866 to work, try 1066Mhz for DDR3-2133, but loosen timings to 11-11-11-30/31. You WILL need more than 1.5v for this (I would be very surprised if you didn't).

I personally think DDR3-2133 is the "sweet spot" for performance:reliability/speed:timings.

Once you get DDR3-2133 stable with 11-11-11-30, you will want to either try dropping the voltage (if you are okay with the timings), or lowering timings.

Try to go from 11-11-11-30 to 10-11-11-30, and if that passes, try 10-11-10-30, then going to 10-11-10-28, and eventually 10-10-10-(28-to-30). Continue in this order until you can't get it stable.

Let's say you get to 9-11-10-28 but can't get the second timing lower, it's okay. Instead, try dropping it to 9-11-9-28.

Every time you get it stable, do a benchmark run to test bandwidth and latency. Write down the results on actual paper, with an actual pencil/pen, as well as keeping track of all the major timings, speeds, voltages, etc.

Eventually, you will find the limit of the RAM. When you do, go back over your list and find what gives you the best results. Stick with that.

Hope this helps thumb.gif
   
Z77 Bench-a-lot
(31 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
MonitorKeyboardPowerCase
55" LG HDTV (their top 2014 model) Ducky Mechanical (Browns) NZXT HALE90 850W + 8 blown-up AX1200/i's NZXT Switch 810 (White) 
MouseMouse PadAudioAudio
R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
OtherOtherOtherOther
Bitfenix Hydra Pro Fan Controller 5ch 30W/ch Bitfenix Alchemy Individually-Sleeved Extension... NZXT Individually-Sleeved Front Panel Wires (Bl... Phobya Sleeved 1x3pin-to-4x3pin Fan Splitter 
OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
  hide details  
Reply
   
Z77 Bench-a-lot
(31 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
MonitorKeyboardPowerCase
55" LG HDTV (their top 2014 model) Ducky Mechanical (Browns) NZXT HALE90 850W + 8 blown-up AX1200/i's NZXT Switch 810 (White) 
MouseMouse PadAudioAudio
R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
OtherOtherOtherOther
Bitfenix Hydra Pro Fan Controller 5ch 30W/ch Bitfenix Alchemy Individually-Sleeved Extension... NZXT Individually-Sleeved Front Panel Wires (Bl... Phobya Sleeved 1x3pin-to-4x3pin Fan Splitter 
OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
  hide details  
Reply
post #4 of 4
Thread Starter 
Quote:
Originally Posted by Sam OCX View Post

There is a lot of things you can try.
I would start by setting the memory to DDR3-1866 or DDR3-2133 and checking stability with the same sort of timings and more voltage (1.65 ish). If it fails - you could try tightening the primaries at DDR3-1600 to 8-8-8 or 7-7-7.

Quote:
Originally Posted by nleksan View Post

Sandy Bridge and Ivy Bridge wubsmiley.gif High Speed Memory, while AMD seems to prefer tighter timings. Now, this is not ALWAYS true, as AMD's APU's have shown significant benefits from higher speed memory.

IN GENERAL, you will want to shoot for the highest SPEED possible, even if you have to loosen your timings a bit.

Here is what I'd aim for:
VOLTAGE: No more than 1.65v (+/- 10%)

Try going to 933Mhz (for DDR3-1866) with 10-10-10-30. That's a very relaxed set of timings, and you should be able to hit it without issue. Increase voltage as needed.

If you can get 1866 to work, try 1066Mhz for DDR3-2133, but loosen timings to 11-11-11-30/31. You WILL need more than 1.5v for this (I would be very surprised if you didn't).

I personally think DDR3-2133 is the "sweet spot" for performance:reliability/speed:timings.

Once you get DDR3-2133 stable with 11-11-11-30, you will want to either try dropping the voltage (if you are okay with the timings), or lowering timings.

Try to go from 11-11-11-30 to 10-11-11-30, and if that passes, try 10-11-10-30, then going to 10-11-10-28, and eventually 10-10-10-(28-to-30). Continue in this order until you can't get it stable.

Let's say you get to 9-11-10-28 but can't get the second timing lower, it's okay. Instead, try dropping it to 9-11-9-28.

Every time you get it stable, do a benchmark run to test bandwidth and latency. Write down the results on actual paper, with an actual pencil/pen, as well as keeping track of all the major timings, speeds, voltages, etc.

Eventually, you will find the limit of the RAM. When you do, go back over your list and find what gives you the best results. Stick with that.

Hope this helps thumb.gif

Thanks guys.
Ok so it seems as with the CPU, its best to try to up the speed and then fine tune the timings. I will give that a go tonight.
I wasnt sure what program to use to benchmark the bandwith and latency but found SiSoftware Sandra. I got these results ( 4th test I was rated 11th! lol ) What results do I need to concentrate on? This is stock settings before any tweaking.


http://www.sisoftware.eu/rank2011d/show_run.php?q=c2ffcdffd9b8d9e4d0e2d3e2d6e2c4b68bbb9df89da090b6c5f8c8
http://www.sisoftware.eu/rank2011d/show_run.php?q=c2ffcefddbbadbe6d0e2d5e0d7f183be8ea8cda895a583f0cdfd
http://www.sisoftware.eu/rank2011d/show_run.php?q=c2ffcdfcdabbdae7d6e5d4e2d5f381bc8caacfaa97a781f2cfff
http://www.sisoftware.eu/rank2011d/show_run.php?q=c2ffc9f8debfdee3d5e4d4f280bd8dabceab96a680f3cefe


Thanks for your input.
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