Sign in with
Sign up | Sign in
Your question

How to configure my 1600MHz sticks so they run at stock speed?

Last response: in Memory
Share
April 14, 2011 3:26:55 PM

Hi,

I'm having some troubles with my ram sticks 2 kits of G.Skill Ripjaws 8 GB : 2 x 4 GB - DIMM 240-pin - DDR3 - 1600 MHz / PC3-12800 - CL9 - 9-9-9-24 - 1.5 V - unbuffered - non-ECC . I can't make them run at stock speed correctly.

When I first booted my computer, my RAM was detected at 1333MHz. So I loaded the XMP Profile in the BIOS. It switched my RAM frequency to 1600MHz and entered automatically the right timings. But when I rebooted the computer, it wouldn't boot at all. The MemOK red led was switched on, so something was wrong with the RAM settings. I had to push the Mem OK switch to run the Mobo RAM tests. The computer rebooted and I could finally access the BIOS. But the settings were changed and everything in the XMP profile was set to Auto instead of specific values like DDR3-1600MHz, or timings.

For some reason my RAM was running at 1600MHz with the frequency setting set to AUTO (wouldn't boot otherwise, Mem OK red led and so on) but it suddenly switched to 1333MHz, 2 days ago. I reloaded the XMP profile in the bIOS but couldn't the same problems as described before occured:
- the computer won't boot
- the Mem OK red led is switched on
- have to manually push the Mem OK Switch so the mobo sets the RAM with values to its liking
- the mobo switching most of the settings to AUTO

In CPUz I can see the RAM is running at 1600MHz but I'm 100% positive it'll switch again to 1333MHz one day or the other.



We can see the RAM is listed as 10700 (667MHz) ???!!

So how do I do to have my RAM sticks permanently run at 1600MHz ?

Setup:
Intel 2600K
Asus P8P67
SSD OCZ Vertex Turbo
Seasonic 650W 80+ Bronze
Win7 64
a b } Memory
April 14, 2011 7:42:56 PM

Are you running the latest BIOS? If not, clear CMOS, flash and reboot.
Also, remove the RAM and wipe the pins with alcohol.
Otherwise, whatever CPUZ says the RAM is running at is accurate.
April 14, 2011 8:17:30 PM

Yes I'm running the latest BIOS for my mobo.
CPU-z said my RAM was running at 667 (1333MHz), that's why I reloaded the XMP Profile and went through all the hassle I described.
Related resources
a c 347 } Memory
April 14, 2011 8:18:58 PM

The simple explanation: Sandy Bridge IMC is 1333 MHz {667 MHz}, and if you placed those same sticks say in an i7 9XX Bloomfield then that value would read 533 MHz. You top image DRAM Frequency 'is' 1600; DDR Double Data Rate, CPU-Z displays 'I/O bus clock' instead of 'Data rate' which maybe not you but most are confused.

In most P67 {B3} posts I've been telling everyone to update their BIOS even prior to installing their OS. There have been a range of problems, and most of them are SATA related.

ASUS P8P67 (vanilla) http://usa.asus.com/product.aspx?P_ID=Qx3PdnZI9Pq9BcIU&... ; P8P67 1401 BIOS 1. Increase Hardware Compatibility. BIOS version 1506 is forth coming.

If you only have 1 set then XMP should work just fine, I don't recommend using XMP on 4x__GB set(s).

Often 4GB requires a slightly increased DRAM Voltage or VCCIO Voltage increase {VTT/QPI/IMC Voltage - maybe one day there'll be one name}.

2x4GB 1600 9-9-9-25-2T

[1] XMP
AI OC Tuner -> XMP
DRAM Voltage -> Auto ; failure 1.55v {± closest value in BIOS)

[2] Manual:
AI OC Tuner -> Auto**
Memory Frequency -> DDR3-1600 MHz
DRAM Timing Control /Enter
9-9-9-25
Command Rate -> 2T
--
DRAM Voltage -> Auto ; failure 1.55v {± closest value in BIOS)

** Manual if DRAM Timing Control is unavailable.
April 14, 2011 9:26:53 PM

Thanks but my 4 RAM slots are populated: I have 2 kits of 2x4GB = 16GB. If you don't recommend to use XMP profiles, how should I proceed then?
a c 347 } Memory
April 14, 2011 9:44:44 PM

As I showed you above see -> [2], and no I didn't realize you had 4x4GB {2 kits}. I always state the XMP limitations because I see this/that issue all of the time.

Use:
[2] Manual:
AI OC Tuner -> Auto**
Memory Frequency -> DDR3-1600 MHz
DRAM Timing Control /Enter
9-9-9-25
Command Rate -> 2T
--
DRAM Voltage -> Auto ; failure 1.55v {± closest value in BIOS)

edit: The 'why' - if you look in your manual you'll see, as in most QVL, 'DIMM Socket Support' with 2-DIMM & 4-DIMM support listed with all sorts of 'kits' listed. Some are fine with 4-DIMM and some 'kits' are not {2-DIMM only}, and so it seems your 'kits' are 'not' which isn't a big deal - hence the manual. There's no advantage of XMP vs Manual, and if you OC then I don't recommend 2X__GB kits to use XMP. OC has a real bad habit of over-voltage to the DRAM Voltage.
April 14, 2011 9:55:34 PM

Ok I'll do that first thing in the morning. I'm not sure to understand the last line you typed:
DRAM Voltage -> Auto ; failure 1.55v {± closest value in BIOS)

I should set the RAM voltage to AUTO and if it fails, I should set it to 1.55v? What do you mean by "closest value in BIOS"?

If it's relevant info, I ran Prime95, Linpack, Linx (Full ram mode) and HyperPi (32MB) without any error for about 2 hours each, when CPU-Z showed my RAM running at 1600MHz.
a b } Memory
April 14, 2011 10:10:40 PM

My 2x4GB kit of Ripjaws X 1600 CL9 also lists itself as 10666 memory, yet runs fine at 1600. G.Skill simply uses hand-picked "best of the bunch" 1333 chips as 1600 chips like a lot of companies do.

You understood the line perfectly. Some BIOSes don't have exact values, so it might have 1.54v or 1.56v instead of 1.55v. Just use whichever is closest. You may even need to set it closer to 1.6v for it to work.
a c 347 } Memory
April 14, 2011 10:30:18 PM

You were having 'Boot Failure' so the settings you listed aren't working. Running Prime95, Memtest86+ with 2X4GB only proves the RAM isn't the problem -- it's a BIOS problem with 4X4GB. The manual settings I provided should correct the problems incl XMP and/or voltage issues.

What I mean by {± closest value in BIOS); the values available in the BIOS DRAM Voltage 'menu' might list 1.546.... or 1.573... {1.546 is the closet value to 1.55v} which is a baby increase of 5/100's of a volt. Frankly, with 4X4GB 1.60v± wouldn't be surprising to me, and NO 1.55-1.70 won't harm your RAM. Damage is when RAM has DRAM Voltage +0.30~+0.40v over spec.

Worst is Auto settings when or if you OC your CPU, I've seen DRAM Voltage -> Auto add +0.30~+0.40v over spec and higher...

Good Luck!
a b } Memory
April 15, 2011 2:38:40 AM

I never use XMP as it always seems to be problematic.....boot to BIOS, go to Advanced Mode.


For stock settings

AI TWEAKER
AI Overclock Tuner: Auto
BCLK/PEG Frequency: Auto
Turbo Ratio: Auto
By All Cores: Auto
Internal PLL: Auto
Memory Frequency: DDR3-1600 DDR3-1600
EPU Power Saving: Disabled

DRAM Timing Control
DRAM CAS Latency 9
DRAM RAD to CAS Delay 9
DRAM RAS PRE Time 9
DRAM RAS ACT Time 25
All Else Auto

For a 4.4 GHz OC

AI TWEAKER
AI Overclock Tuner: Manual
BCLK/PEG Frequency: 100
Turbo Ratio: By All Cores
By All Cores: 44
Internal PLL: Auto
Memory Frequency: DDR3-1600 DDR3-1600
EPU Power Saving: Disabled

After that you should get more familiar with the various BIOS settings specifically with regard to LLC. Here's some guides:

http://www.clunk.org.uk/forums/overclocking/39184-p67-s...
http://hardforum.com/showthread.php?t=1578110
http://www.xtremesystems.org/forums/showthread.php?t=26...
April 15, 2011 9:23:32 AM

Thanks guys this is really helpfull. I'm wondering one thing: you're both recommending to set the tRAS value to 25 although my RAM timings specs indicate 9-9-9-24.
What's the reason for this? Why would Gskill tRAS 24 sticks on the market if you have to set the value to 25 anyway?
a b } Memory
April 15, 2011 1:24:26 PM

CPU-Z shows a tRas value of 25, which is what is stored in Module. I would use that as opposed to writen Info. If info/Stored is in conflict, I normally select the Looser of the two value. Your not going to see any diff if set to 24 or 25 in terms of performance.

On my Ripjaw DDR3-1600 CL7 @1.6V. The timings use to be 7,7,7,7, But the newer ones now list 7,8,7,7. I added a set of 2 x 2 Newer ones to my set of 2 x 2 older ones. The new ones still showed the 7,7,7,7 timings and bot sets ran fine with that setting. Subsequently went with 4 x 4 CL=7,8,7,7 which is what it is set to - Absolutly no diff in performance that I can tell.

For what it's worth, I have my P55-UD4P set to use XMP profile 1 which set everything to Specs - But do concur manually setting is prefered.

a c 347 } Memory
April 15, 2011 2:40:18 PM

PODxt said:
Thanks guys this is really helpfull. I'm wondering one thing: you're both recommending to set the tRAS value to 25 although my RAM timings specs indicate 9-9-9-24.
What's the reason for this? Why would Gskill tRAS 24 sticks on the market if you have to set the value to 25 anyway?

As @RetiredChief explained everyone here is reading your CPU-Z info, and yes 'most' 1600 9-9-9 are '24' vs CPU-Z 25 value. Assuming you have 2 kits of F3-12800CL9D-8GBXL http://www.newegg.com/Product/Product.aspx?Item=N82E168... then sure use 9-9-9-24-2T.
April 16, 2011 3:19:03 PM

OK, well, unfortunately your advices didn't do it for me :sweat: 

I did a short video showing what I do in the BIOS, so you can confirm I'm doing exactly what you told me to. The only thing I'm doing we can't see on screen is me pushing the computer "power" button to start up the machine at 1'32 (you can actually hear me pushing the switch)




You can see the computer won't be able to boot when I change the RAM settings. I have to push the Mem OK switch to reset the RAM settings and when going back to the BIOS it shows that everything was reset to AUTO.

What can I do from here?
a b } Memory
April 16, 2011 4:03:32 PM

PODxt said:
What can I do from here?
Leave them at 1333.
a c 347 } Memory
April 16, 2011 4:07:50 PM

It appears when the DDR3-1600 MHz is used the Auto CAS is/was correct. Next, is to try the VCCIO as I first referenced above.

You can start high with VCCIO and scale it down or visa versa. I would start high because if the 1.20v won't work then I have my doubts the lower values will work.

AI OC Tuner -> Auto
Memory Frequency -> DDR3-1600 MHz

DRAM Timing Control /Enter {optional per video}
9-9-9-25
Command Rate -> 2T
--
DRAM Voltage -> Auto ; failure 1.55v
VCCIO Voltage -> 1.05~1.10~1.15~1.20v ; 1.20v is the high safe.

edit: if VCCIO @ 1.20v fails then try DRAM Voltage @ 1.60v. Both values are high, but not too high and IF they work as I stated you can try lower values of each.
April 19, 2011 2:19:09 PM

VCCIO 1.20v shows up in red when I go that high. Are you 500% sure I can't fry anything with this setting?
April 19, 2011 2:32:56 PM

I did:
AI OC Tuner -> Auto
Memory Frequency -> DDR3-1600 MHz

DRAM Timing Control /Enter {optional per video}
9-9-9-24
Command Rate -> 2T
--
DRAM Voltage -> Auto ; failed so tried 1.60v
VCCIO Voltage -> 1.15v

Like before, the computer won't boot, I get the Mem OK red led, and the mobo resets all settings to AUTO but this time leaves the cutom voltage value I set for the VCCIO.

Did someone ever manage to run its 1600MHz RAM run at stock speeds with a P8P67??? I mean I bought 1600MHz sticks, not 1333...
a b } Memory
April 19, 2011 3:34:26 PM

Yes, 1.2v on the VCCIO is still in the safe zone despite turning red in your BIOS. You may also have to try 1.65v on the DRAM Voltage. I don't like telling people to run their RAM at 1.65v with a Sandy Bridge system, but it might help in this case.
a c 347 } Memory
April 19, 2011 4:35:43 PM

Reality check - assuming all you're changing is the RAM settings and nothing else there should be no problems. I noticed your G.SKILL post, and if you look for F3-12800CL9D-8GBXL kits there seems to be a lot of problems.

edit: Yes you can try DRAM Voltage -> 1.60~1.65v and if it works then a +0.15v is not considered 'bad' and VCCIO -> 1.1~1.2v isn't a problem and VCCIO of 1.2v is the highest safe value.

your Post -> http://gskill.us/forum/showthread.php?t=8207

IMO if wanted a 16GB set then I'd get a Tested Set -> http://www.newegg.com/Product/Productcompare.aspx?Submi...|20-145-347^20-145-347-TS%2C20-233-143^20-233-143-TS
!