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Did i follow bad advice for getting RAM to run at 1600?

Last response: in Memory
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April 29, 2011 5:36:27 AM

i installed RAM and everything seemed to work fine because Windows 7 booted normally and showed the correct amount. i then restarted and changed settings in BIOS according to the quote below. everything came back normally and ran fine for several hours. all settings looked normal according to CPU-Z and i even played some Crysis 2 for about 30 minutes. i then walked away from the computer and when i came back several hours later it was on a blue screen that informed me of a memory error.
i tried many things but could not get it to boot again and then ran a Memtest86+ v4.20 test for about 30 minutes and it came up with approximately 1.5 million errors before i had seen enough and shut it off.
reinstalled old memory and booted just fine after it ran a chkdsk and fixed a bunch (thousands?) of errors. although now CCC is no longer working everything else seems fine.

this is the RAM kit:
G.SKILL Ripjaws Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600

my motherboard:
ASUS M4A79T Deluxe

Administrator on the GSKILL forums named GSKILL TECH
Quote:
If you have an AMD CPU motherboard combo, and DDR3-1600 memory, the system should be configured as follows.

There are several ways to reach DDR3-1600, but this is the ideal method:
1. Set DRAM Frequency to DDR3-1333.
2. Set CPU Host/Bus Frequency to 240 (this will overclock the memory frequency to DDR3-1600)
2a. Raising the bus frequency will also overclock the CPU, so if you do not want this, you will need to lower CPU Ratio to your desired frequency. If you do want to keep it, you may need to raise CPU VCore to stabilize the overclock. If you have a Black Edition CPU, then it should be capable of the overclock without any voltage adjustments, but for non-BE's most likely you will need to raise CPU VCore.
3. Set timings to tCL 9 - tRCD 9 - tRP 9 - tRAS 24, or whatever your memory is rated for.
4. Set DRAM Voltage to 1.50V, or whatever your memory is rated for.


these are the correct timings and voltage for the RAM so i set everything in BIOS as seen in quote. my CPU is the Phenom II x4 955 BE so i didnt change any of the settings for it. old RAM is Mushkin Blackline 996601 which runs at 1.8 - 1.9 volts and much tighter timings so i made absolutely sure to change the voltage and timings before trying to boot with the GSKILL.
April 29, 2011 8:56:43 AM

WOW voltage sounds High
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a b } Memory
April 29, 2011 9:04:22 AM

You may need to increase the RAM voltage to 1.6v or 1.65v -- some boards need the extra voltage to run four sticks. Also, make sure the command rate is 2N/2T.
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April 29, 2011 9:06:50 AM

ya but 1.8-.19 volts is high for ram can damage MOBO or CPU
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a b } Memory
April 29, 2011 9:11:52 AM

Re-read the post. That was for the old RAM that was replaced.
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April 29, 2011 9:25:18 AM

oh woops
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a b } Memory
April 29, 2011 2:27:48 PM

1.5v memory was designed for Intel P67. I bet 1.65v memory would work fine.

Have you tried DDR3-1333 CL8 (8-8-8-24) 1.50V ?

From Gskill (3rd review down on the ram link you posted above):

Quote:
According to AMD specifications, the CPU is only capable of DDR3-1600 with one DIMM per channel. For 16GB, you need to operate DDR3-1066 or DDR3-1333.
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April 29, 2011 2:33:32 PM

Or the memory could just be bad.
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a b } Memory
April 29, 2011 3:53:10 PM

baddad said:
Or the memory could just be bad.


Or NOT. Did you read the quote above??
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a b } Memory
April 29, 2011 4:16:46 PM

@ GeekApproved
I think he is only using one dimm per channel (4 x 4 gig sticks).
However I agree with trying the timings you suggest.

Not familar w/AMD proc.
On my I5-750, I am using Ripjaw ddr3-1600 (4 x 4) CL7 @ 1.6 V
Running at specs, but using a bclk of 200 (Memory is at a even harmonic of Bclk)
wondering if setting bclk to 200 vs stated 240 and using 1.6V for Ram might do the trick.

Always use bootable CD w/memtest to verify memory is AOK before going into operating system when ever you change memory, or memory freq/timings.
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a b } Memory
April 29, 2011 4:57:19 PM

RetiredChief said:
@ GeekApproved
I think he is only using one dimm per channel (4 x 4 gig sticks).
However I agree with trying the timings you suggest.

Not familar w/AMD proc.
On my I5-750, I am using Ripjaw ddr3-1600 (4 x 4) CL7 @ 1.6 V
Running at specs, but using a bclk of 200 (Memory is at a even harmonic of Bclk)
wondering if setting bclk to 200 vs stated 240 and using 1.6V for Ram might do the trick.

Always use bootable CD w/memtest to verify memory is AOK before going into operating system when ever you change memory, or memory freq/timings.


??? How could he be only using 1 dimm per channel if he has 4 dimms?? Theres 2 channels and 4 dimms, that's 2 dimm's per channel. :hello: 

I take it you failed math?
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April 30, 2011 12:56:31 PM

right, dual channel. it was originally running at 1333 just with auto in BIOS. then when i restarted and upped the bus freq to 240 it automatically changed the RAM to 1600. booted into Windows and everything was fine while playing a little Crysis 2. the CPU was OCed to 3.8 but seemed to be fine also. no heat issues and i was really happy with the ease of getting the RAM at 1600 and the nice OC on the CPU was just a bonus. came back after a while and blue screen. couldnt ever get it to boot again. ran the memtest and came up with 1.5+ million errors and it was only about 2% into the test.

does it sound like the RAM was good and then fell apart after the OC? RMAing it on monday, so i would like to get some solid timings/voltage to run at. should i just stay away from the 1600 OC?

thanks for the replies! and the 1.8 volt was for the Mushkin 996601 that i pulled out and since put back in.
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a b } Memory
April 30, 2011 1:14:28 PM

Heynow!
From what i understand 1600Mhz ram is problematic with alot of AMD boards.
Particularly Gskills it seems.
Picked that up from reading customer feedback on Newegg,where Gskill Tech Support posts replies.
Having a faulty module in a 4 stick kit isn't surprising.
Bought 2 kits of Corsair ram and one stick was bad.
I would buy 1333Mhz with low timings if i were you.
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a b } Memory
April 30, 2011 2:56:33 PM

^ + 1
@ GeekApproved
Yea, allways had trouble with simple math!! But ask me Sq root of two or 3, or the logarthim of two or three.

His board should, and did run, with 4 gig Ram per slot.
Quess I should have said slot. Dual channel implies two channels and requires two slot??? Put two diff sized modules in two slots (Slots for dual ch) and you get Two single channels.??
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a b } Memory
April 30, 2011 3:51:34 PM

If there's 4 dimm slots and you only have 1 dimm, that's single channel.

If there's 4 dimm slots and you have 3 dimm's that's single channel.

If there's 4 dimm slots and you have 2 dimms (in the correct slots) thats dual channel.

If theres 4 dimm slots and you have 4 dimms, that's dual channel.
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a b } Memory
April 30, 2011 6:45:07 PM

heynow said:
right, dual channel. it was originally running at 1333 just with auto in BIOS. then when i restarted and upped the bus freq to 240 it automatically changed the RAM to 1600. booted into Windows and everything was fine while playing a little Crysis 2. the CPU was OCed to 3.8 but seemed to be fine also. no heat issues and i was really happy with the ease of getting the RAM at 1600 and the nice OC on the CPU was just a bonus. came back after a while and blue screen. couldnt ever get it to boot again. ran the memtest and came up with 1.5+ million errors and it was only about 2% into the test.

does it sound like the RAM was good and then fell apart after the OC? RMAing it on monday, so i would like to get some solid timings/voltage to run at. should i just stay away from the 1600 OC?

thanks for the replies! and the 1.8 volt was for the Mushkin 996601 that i pulled out and since put back in.


Did you even bother to read what I wrote or are you just ignoring the obvious??

Quote:
According to AMD specifications, the CPU is only capable of DDR3-1600 with one DIMM per channel. For 16GB, you need to operate DDR3-1066 or DDR3-1333.


You have TWO dimms per channel, so you can't run at 1600mhz. Why are you RMA'ing the ram??????
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a c 347 } Memory
April 30, 2011 7:27:50 PM

Here's what's going on:
The OLD 996601 is 1.85-1.9V @ 1600 MHz, but at 1333 MHz 'SPD' it's 1.50v. Runnig your NEW RAM at 1333 MHz vs 1600 MHz is ~1% difference.

The NEW F3-12800CL9Q-16GBRL is 1.50V @ 1600 MHz.

The PROBLEM is Memory Multipliers to FSB Frequency in relation to CPU IMC. The Phenom II 955 Black 'can' run 1600 if the FSB Frequency is raised ; 4 x DIMM, Max. 16 GB, DDR3 1600(O.C.)/1333/1066 ECC,Non-ECC.

The '240':
200/1333 = X/1600 ; 1333 * X = 200 * 1600 ; X = (200 * 1600) / 1333 ; X = 240

The 'Stock':
3200/200 = 16 Multiplier
3200/240 = 13.3 Multiplier a/k/a CPU Ratio

F3-12800CL9Q-16GBRL = 9-9-9-24-2N @ 1.5V - Settings:
BIOS non-OC:
Load Defaults
IF Available: DRAM Frequency -> 1600 MHz
DRAM Command Rate -> 2T
TCL -> 9
TRCD -> 9
TRP -> 9
TRAS -> 24
Save & Exit ; note if there were BIOS changes like AHCI, etc then enter those prior to saving.

Failure BIOS **:
DRAM Voltage -> 1.55v~1.60V

Failure BIOS **:
CPU/NB Voltage -> 1.20~1.25V

** Sometimes a Maxed-Out DIMM setup becomes underpowered.

-------------------------------

F3-12800CL9Q-16GBRL = 9-9-9-24-2N @ 1.5V - Settings:
BIOS OC:
AI OC Tuner -> Manual
CPU Ratio - > '13.3' {depending on your options, 13 is underclocking your CPU and 14 is overclocking your CPU.
// 13 * 240 = 3120 (3.12GHz) or 14 * 240 = 3360 (3.36GHz)
FSB Frequency -> 240
DRAM Frequency -> 1600 MHz
DRAM Command Rate -> 2T
TCL -> 9
TRCD -> 9
TRP -> 9
TRAS -> 24
Save & Exit ; note if there were BIOS changes like AHCI, etc then enter those prior to saving.

Failure BIOS **:
DRAM Voltage -> 1.55v~1.60V

Failure BIOS **:
CPU/NB Voltage -> 1.20~1.25V

** Sometimes a Maxed-Out DIMM setup becomes underpowered.
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May 1, 2011 5:32:52 AM

most of this is going right over my head. can you dumb it down a little?

from reading these posts and more stuff on the GSkill forums im thinking that i should just set the new RAM at 1333 with 8-8-8-24 timings and 1.5 volts. if its stable then dont ever monkey with it again...
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a c 347 } Memory
May 1, 2011 1:49:31 PM

RAM should run at Defaults or 'SPD' without the need of 'tweaking' the BIOS.

Step 1 = Defaults
BIOS:
Load Defaults
Save & Exit = Yes

Shutdown
Install F3-12800CL9Q-16GBRL
Restart

Step 2 = Failure and Correction
Running Default 'should' work, but if it doesn't then as a last resort look in the Manual - page 2-20 {PDF pg 40} Section '2-20 Jumpers' and perform 4-set procedure 'To erase the RTC RAM'.

BIOS:
Set Date & Time
Load Defaults
Save & Exit = Yes

If that fails then either the RAM or MOBO is bad.

I am not sure 1333 8-8-8-24 will work it look like 1333 9-9-9-25 to me per JEDEC.
CPU-Z F3-12800CL9Q-16GBRL http://gskill.com/products.php?index=335


Please update findings and Good Luck.
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May 2, 2011 7:57:33 AM

are the errors in memtest a result of the failed OC or is it more likely that there is a bad stick?

geekapproved said:
You have TWO dimms per channel, so you can't run at 1600mhz. Why are you RMA'ing the ram??????


is it possible that the RAM is still good? after defaulting the BIOS and still not being able to boot i ran the memtest and came up with all those errors and assumed that that meant it was RMA time.
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a c 347 } Memory
May 2, 2011 4:05:59 PM

Huh??!!! The F3-12800CL9Q-16GBRL ARE a MATCHED 1600 MHz Rated 4X4GB Set.

If you performed my 'Step 2 = Failure and Correction' and you're still having failures then test Set A 2X4GB and another Set B 2X4GB.

If you find Set A = Bad and Set B = Good then 1 of 2 in Set A is BAD.

If both FAIL {A1+B1} then try the other 2 DIMM Slots {A2+B2} and IF they PASS AND FAIL {Visa Versa} then you've got a BAD MOBO.
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May 3, 2011 10:05:43 AM

im so confused now. lets start simple.
will the F3-12800CL9Q-16GBRL RAM ever run at 1600 on the ASUS M4A79T Deluxe?
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a c 347 } Memory
May 3, 2011 3:44:55 PM

There's no official support for F3-12800CL9Q-16GBRL and your MOBO; here's the official support list -> http://gskill.com/configurator2.php?pid=2&model=374

Keep in mind most P55 RAM is fine in most AMD MOBOs, where it gets 'tricky' is 1600 MHz and faster frequencies.

To determine if it's the RAM or MOBO:
1. Take the RAM and split it into (2) 2X4GB 'sets' ; set A & set B
2. BIOS Load Defaults

3. The following tests the MOBO DIMM Slots:
Config 1:
CPU | A | A | empty | empty |
CPU | empty | empty | A | A |

Config 2:
CPU | B | B | empty | empty |
CPU | empty | empty | B | B |
note: If you've already determined the 'bad' stick then the 'good' RAM should be fine in BOTH the right 2 DIMM slots and left 2 DIMM slots.

4. OPTIONAL TESTES:
Config 3:
/ If one of 'B' fails /
CPU | A | B1 | empty | empty |
CPU | A | B2 | empty | empty |

/ If one of 'A' fails /
CPU | B | A1 | empty | empty |
CPU | B | A2 | empty | empty |

Config 4:
CPU | PASS | PASS | empty | empty |
CPU | empty | empty | PASS | PASS |
CPU | PASS | PASS | PASS | empty |

Optional 1333 MHz testing:
F3-12800CL9Q-16GBRL = 9-9-9-24-2N @ 1.5V - Settings:
BIOS non-OC:
Load Defaults
IF Available: DRAM Frequency -> 1333 MHz
DRAM Command Rate -> 2T
TCL -> 9
TRCD -> 9
TRP -> 9
TRAS -> 24
Save & Exit ; note if there were BIOS changes like AHCI, etc then enter those prior to saving.

Failure BIOS **:
DRAM Voltage -> 1.55v~1.60V

Failure BIOS **:
CPU/NB Voltage -> 1.20~1.25V
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