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Memory frequency

post #1 of 8
Thread Starter 
Does the frequency that a company says the board can overclock to really matter? I.e could I overclock it higher? And what physically allows the board to potentially overclock the memory to higher frequencies?
post #2 of 8

The specifications of a motherboard where it says "(O.C.)" don't mean that you're overclocking the memory. In a nutshell, the board is extending the supported memory speed beyond what the CPU is natively capable of, but you have to set it manually. So, the highest speed shown by "(O.C.)" is the highest supported memory that the board can handle. You can still overclock the memory beyond that though.

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post #3 of 8
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

The specifications of a motherboard where it says "(O.C.)" don't mean that you're overclocking the memory. In a nutshell, the board is extending the supported memory speed beyond what the CPU is natively capable of, but you have to set it manually. So, the highest speed shown by "(O.C.)" is the highest supported memory that the board can handle. You can still overclock the memory beyond that though.

So you can clock the RAM speed higher than the manufacturer's speed on the product page (like "O.C 3866'") but it won't do anything? Also what components on the motherboard allow for higher clock speeds?
post #4 of 8
Quote:
Originally Posted by pizzaslice View Post


So you can clock the RAM speed higher than the manufacturer's speed on the product page (like "O.C 3866'") but it won't do anything?

 

No, that's not what I said. The confusing thing here is, these motherboard manufacturers are using "(O.C.)" even though this has nothing to do with overclocking the memory. I'll use the example of my motherboard:

 

"DDR3 2200(O.C.)*/2133(O.C.)/1866(O.C.)/1600/1333/1066"

 

This means that if you install DDR3 1066 or 1333 or 1600, then it will automatically get set to that speed and you won't have to do anything at all. If you install DDR3 1866 memory or higher, then you will have to manually set it to your memory's rated speed. It's not overclocking. You can still overclock beyond your memory's rated speed if you want, such as installing DDR3 1866 but setting it to something higher than that; that would be overclocking. Setting it to DDR3 1866 wouldn't be overclocking at all though, not for the memory at least (perhaps it's overclocking for the IMC, but definitely not the memory).

 

The CPUs that are compatible with this motherboard natively support DDR3 1066/1333. This motherboard extends that native support up to DDR3 1600. It also supports DDR3 1866 and higher, but the "(O.C.)" means "you'll have to set the clock speed manually" (so it extends the support beyond DDR3 1600, but it's not native, which means it won't default to DDR3 1866 or higher when such memory is installed).

 

Quote:
Originally Posted by pizzaslice View Post


Also what components on the motherboard allow for higher clock speeds?

 

I have no idea, but to be honest, I don't care how it works, I just care that it works.

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post #5 of 8
Isn't anything over 1600 technically overclocked since the memory industry's JEDEC standard only covers spends up to 1600 and the manufacturers are just "overclocking" by using a non-standard SPD table?
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post #6 of 8
Quote:
Originally Posted by billbartuska View Post

Isn't anything over 1600 technically overclocked since the memory industry's JEDEC standard only covers spends up to 1600 and the manufacturers are just "overclocking" by using a non-standard SPD table?

 

Good question. I don't know, but I have to keep it simple. I guess that would explain why they use "(O.C.)" though.

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250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
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Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
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Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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post #7 of 8
LOL...

I think they use (OC) so that the help desks can tell the nOObs that they have to push some (unknown) buttons to make it run at that speed.

"Ok, lets overclock that memory now"
"Is your computer plugged in?"
"It is, - OK
"Now push the power button"
Etc.
.
.
.

"OK, I'll give you an RMA number"
Edited by billbartuska - 11/8/15 at 3:50am
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My System
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FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
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2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
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post #8 of 8
Quote:
Originally Posted by pizzaslice View Post

So you can clock the RAM speed higher than the manufacturer's speed on the product page (like "O.C 3866'") but it won't do anything? Also what components on the motherboard allow for higher clock speeds?
Yes you can do higher, they just list speeds at which they want to stand behind. It could also be that they list speeds of the maximum memory they have vlaidated to work through teh QVl list.

There are two major ways to ensure higher memory speeds:
#1 Hardware
#2 Software

#1. There are different things which can impact the overclocking of memory on a motherboard, everything from trace layout (the angle of the bend, the relative length of the trace, equalizing traces to match), timing of the signals, number of DIMMs, DIMM type (most boards use through-hole but technically SMT should offer better signalling, but its rare to find this). Power is also important, but not a huge bottleneck.

#2. In the UEFI the BIOS engineers have a fair amount of backdoor timings and settings they can use to alter the signals, BIOS is possibly the largest area where memory improvements are made considering you can't change hardware layout after the fact. Everything from IMC timings to backdoor voltages, drive strengths, and other parameters that are usually hidden from view. Much of the time just getting things to work right can be a hassle b/c different engineers have different definitions of what they consider working, and their priorities are different. A BIOS programmer with a passion and knowledge of overclocking can make pretty large strides in Taiwan (where most of the board makers have their BIOSes programmed).
    
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