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DDR 3 1600 mhz cl8 tight timing to 1333 mhz cl7

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October 30, 2010 7:11:42 AM

Hello ,
I have 2 x OCZ3G16002G and i5 750 2.66 ghz. My cpu doesn't support 1600 mhz.So my rams is running 1333 Mhz. But i am not sure voltage values and settings. Dram : 1.64 volt Qpi : 1.21 volt Trfc : 80 Cr :1T 1333 mhz 7-7-7-20 . ( My ram is 8-8-8-24 1.7 volt. 1600 mhz not Lw ) Does these values and settings correct or not ? What is your advice Dram-Qpi voltage for 1333 mhz, for stability-performance ?
Bios Default ( Dram :1.5 volt qpi:1.1 v 7-7-7-16 1066 mhz )
Thank you
October 30, 2010 8:00:38 AM

System is random freezing with this settings :S .What do i need increase or decrease volts ? :S
October 30, 2010 6:00:46 PM

Your memory is 1.7 volts which for new intel processors with their integrated memory controller is a really bad idea. See if you can get a replacement to a 1.65Volt memory or lower.
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a b V Motherboard
October 31, 2010 11:54:32 PM

Agreed. Return it for something suitable for your board. 1.5V RAM is about the average these days. You could go up to 1.65, or you'll even see some around 1.35V. If you can't return it, try locking the RAM V in at 1.64V. Then set it to 8-8-8-24 and 1333 MHz.
a c 715 V Motherboard
October 31, 2010 11:57:39 PM

A lot of this stuff isn't actually correct.

Q - What MOBO do you have?
November 3, 2010 2:09:36 AM

System is:
i5 750 2.66 ghz
2 x 2 OCZ3G16002G 1600 MHZ DDR3
Ati Sapphire 5850 Toxic
Gigabyte P55-UD3R
OCZ 500 Watt Psu.
i know need Lw rams.But i am running them with 1333 mhz.
a c 715 V Motherboard
November 3, 2010 11:09:01 AM

Specs on your RAM {OCZ3G16002G} 1600 MHz CL8 ( 8-8-8-24 ) 2T @ 1.8V

Known working timings: 1333 (7-7-7-30) 1T ; DRAM Voltage AUTO

REF {verify this is indeed your MOBO - 1st}
GA-P55-UD3R (rev. 1.0) http://www.gigabyte.us/products/product-page.aspx?pid=3...
DDR3 2200/1600/1333/1066/800 MHz
BIOS {F8} current ; {F5} minimum "Enhanced memory compatibility"

OS:
If you have ANY Gigabyte Utilities then UNINSTALL; GA has the worst BIOS conflicting/unstable making utilities bar none.

BIOS:
If it were 'me' then I would do the following {1333}:
1. Load Optimized
2. Tweak the BIOS for 'other misc' settings if needed
3. RAM {manual} - set timings to (7-7-7-30) 1T
a. System Memory Multiplier {Auto} 'verify' Memory Frequency {1333}
b. Memory Frequency {1333}
c. Extreme Memory Profile (X.M.P.) {Disabled}
d. DRAM Timing Selectable {Quick}
e. Set -> (7-7-7-30) 1T
f. Save & Exit {Yes}

I rarely recommend BIOS updates, and if it were 'me' then my preference would be to run 'F8', and at a minimum 'F5'. 'F4' is required with your CPU.

Good Luck - let us know. :) 
a b V Motherboard
November 3, 2010 12:19:51 PM

I would lock in the RAM (DIMM) V to prevent it from being pushed up to 1.8. Try it at 1.5V, it looks like you had some success there before. If not, then go no higher than 1.64V.

Also - jaquith - why the recommended timing of 7-7-7-30? OP states it was coming up at 7-7-7-20.
a c 715 V Motherboard
November 3, 2010 1:09:12 PM

ekoostik said:
Also - jaquith - why the recommended timing of 7-7-7-30? OP states it was coming up at 7-7-7-20.

Reading OCZ Staff posts RE: OP RAM "Known working timings: 1333 (7-7-7-30) 1T ; DRAM Voltage AUTO"

Everyone, gets it in their minds for 'some' reason 'up the voltage' - sure when EXTREME OC but only IF unstable. Remember +Voltage = +Heat ; over/under Voltage = Unstable. Most RAM has an operational tolerance of ~± 0.3V.

Last week an OP was OC their RAM - same idea +Voltage. The + Voltage from everyone's {except mine} rendered the rig unstable. In my OC I always try to find the least Voltage to achieve a stable environment; sometimes I get away with under voltage.
a b V Motherboard
November 3, 2010 1:29:38 PM

I think you misunderstood me - I am not suggesting the V be upped. I am suggesting that the OP find an appropriate V and then lock in that V to prevent it from being raised to unsafe levels by an 'Auto' setting. Thus the recommendation, start at 1.5V. If not stable, slowly increase until it is but do not go higher than 1.64V.

Please post links when quoting material from elsewhere.
a c 715 V Motherboard
November 3, 2010 1:42:24 PM

ekoostik said:
Please post links when quoting material from elsewhere.


That was 80+ sites ago today; Google OCZ3G16002G and look at OCZ forums. I'm never going to post what I didn't know {100%} myself nor Unreliable sources.
November 3, 2010 4:07:03 PM

jaquith said:
Specs on your RAM {OCZ3G16002G} 1600 MHz CL8 ( 8-8-8-24 ) 2T @ 1.8V

Known working timings: 1333 (7-7-7-30) 1T ; DRAM Voltage AUTO

REF {verify this is indeed your MOBO - 1st}
GA-P55-UD3R (rev. 1.0) http://www.gigabyte.us/products/product-page.aspx?pid=3...
DDR3 2200/1600/1333/1066/800 MHz
BIOS {F8} current ; {F5} minimum "Enhanced memory compatibility"

OS:
If you have ANY Gigabyte Utilities then UNINSTALL; GA has the worst BIOS conflicting/unstable making utilities bar none.

BIOS:
If it were 'me' then I would do the following {1333}:
1. Load Optimized
2. Tweak the BIOS for 'other misc' settings if needed
3. RAM {manual} - set timings to (7-7-7-30) 1T
a. System Memory Multiplier {Auto} 'verify' Memory Frequency {1333}
b. Memory Frequency {1333}
c. Extreme Memory Profile (X.M.P.) {Disabled}
d. DRAM Timing Selectable {Quick}
e. Set -> (7-7-7-30) 1T
f. Save & Exit {Yes}

I rarely recommend BIOS updates, and if it were 'me' then my preference would be to run 'F8', and at a minimum 'F5'. 'F4' is required with your CPU.

Good Luck - let us know. :) 


I am running them with 7-7-7-21 timings dram v : 1,64 and qpi : 1,35 v 1T .I am testing, if i have any error or unstable issue, i will try your advice. But 30 is very slow,right ?
a c 715 V Motherboard
November 3, 2010 4:19:25 PM

No, 30 is not slow. The speed of RAM is mostly about the IC used and CAS uniformity and then there's the rest. If you system 'feels' slow it isn't the RAM {assuming 2GB 32-bit OS and 4GB 64-bit OS}, it's your: 1. HDD, 2. CPU, 3. corrupted Apps/Registry, etc.

Note all the differences and 'how close' they actually are tested.

Comparison Module #1: Mushkin Redline 996805 6-8-6-24 1600MHz
Comparison Module #2: G.Skill Pi Series 7-8-7-24 1600MHz
Comparison Module #3: Mushkin 998687 8-9-8-24 1866MHz
Comparison Module #4: Corsair Dominator TR3X6G1600C8D 8-8-8-24 1600MHz
Comparison Module #5: Kingston HyperX T1 9-9-9-27 1600MHz
Comparison Module #6: Mushkin Blackline 998677B 7-7-7-20 1333MHz
Comparison Module #7: Patriot Viper II Sector 7 9-9-9-27 1800MHz
Stock RAM Speeds:
November 3, 2010 6:52:17 PM

Thank you jaquit i had wrong information.Changed settings : 7-7-7-30 timings , Dram: 1.64 volt (Default 1.5 v.) qpi :1.35 volt ( Default 1.1 volt ) CR : 1T Performance ench : Turbo, SPD : X 10 (for 1333 mhz, Default is Auto it is mean 133x8 = 1066 mhz ) Trfc = 88 correct ?
a c 715 V Motherboard
November 3, 2010 7:45:45 PM

It's correct if its running and stable. The only number is the tRFC; did you or the BIOS set that number?

Like a fool I lost the link from before.
November 3, 2010 8:04:44 PM

jaquith said:
It's correct if its running and stable. The only number is the tRFC; did you or the BIOS set that number?

Like a fool I lost the link from before.

I did.I saw many post ocz staffs generally suggesting Trfc's value 80 or 88 for my rams(Default 60 ). It seems stable, i will see Jaquith thank you very much for your interest
!