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Windows 7: not sure about ram timings

17 Jul 2011   #1
ganjiry

Win7 Home Premium x64 SP1
 
 
not sure about ram timings

hi all.
this is the ram im using 8Ghz 2x4 corsair CMX8GX3M2A1600C9. everywhere ive looked online says the speed is 1600 timings 9-9-9-24. but looking at my speeds n timings mine is runnin at 1066 7-7-7-20. is this just down to my mobo? should i change it and would there b any noticeable increase in performance?
cheers folks




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17 Jul 2011   #2
speedgamer01

Windows 7 Ultimate 64 bit SP1
 
 

1. That is an 1600mhz RAM so you can set it manually in the bios to 1600, mine is a 1600 hyperx and when i installed my mobob thought it was a 1333mhz ram, so enabled XMP (which is only kingston stuff, but you can set 1600mhz with no worries)
2. Those other numbers are called latency timings, those define the time between the actions. Therefore you actually overclock your RAM by decreasing those lateny numbers. here is the explanation
You should not overclock your RAM with those, all in all, If you are sure about that product number, you should set those timings and frequency.
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17 Jul 2011   #3
ganjiry

Win7 Home Premium x64 SP1
 
 

hi speedgamer.
cheers for the quick reply. ive just had a look at the mod num on the sticks n its deffo CMX8GX3M2A1600C9. so i should b ok with changing it. ive never bothered with the bios much b4 n timings. its all pretty straight 4ward tho isnt it?
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17 Jul 2011   #4
ganjiry

Win7 Home Premium x64 SP1
 
 

hi all
ive just checked in my bios. i did the changes just to check but didnt save them. if i change the set mem clock to manual instead of auto.
change the multiplier from 5.33 to 8 somethin it shows as 1600. is that all i have to do? i dont want to overclock just run at the right speed.
thanks
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17 Jul 2011   #5
speedgamer01

Windows 7 Ultimate 64 bit SP1
 
 

All of the bios(es) (LOL) are different, but esentially if you know what the options mean you cant get lost, just dont touch anything, only change those settings that u are familiar with. Dont overclock now
Here is an article, what the 4 numbers are, in your case:
CL
= 9,
tRCD
= 9,
tRP 9,
tRAS = 9
Your bios will be similar to this.
I'm looking forward to ur results
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17 Jul 2011   #6
ganjiry

Win7 Home Premium x64 SP1
 
 

ive just looked in the bios on how to change it. i know how to change it to 1600 as in my above post. do i need to change the timings aswell or leave those?? cheers
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17 Jul 2011   #7
speedgamer01

Windows 7 Ultimate 64 bit SP1
 
 

Yes you should change them, if now they are really set to 7 7 7 20, then it's a dirty overclocking.
My System SpecsSystem Spec
17 Jul 2011   #8
ganjiry

Win7 Home Premium x64 SP1
 
 

ok this is how they r at the min. i havent changed anythin as yet. still stock at 1066.
CAS# LATENCY = 7,
RAS#TO CAS# = 7,
RAS# PRECHARGE 7,
tRAS = 20

do i just change them to what they r shown as in the online specs?

CAS# LATENCY = 9,
RAS#TO CAS# = 9,
RAS# PRECHARGE 9,
tRAS 24

Does tRC have to b changed?
also the voltage says at 1600 it is 1.65v instead of 1.50. does that hav to b changed aswell or leave on auto?.
sorry 4 all the questions but im fairly new to pc's and havet had to deal with the bios or changing these kind of settings


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17 Jul 2011   #9
speedgamer01

Windows 7 Ultimate 64 bit SP1
 
 

I did a little research, and 1.65 volts seems to be Ok.
Yes, you should change tRC as well (according to that XMP-1600 profile in CPUZ)
I figured out that all of these memory modules are similar, so if it has 9-9-9-24 timings then it was built on the xmp profile, which determines that the tRC is 41! Your ram is still runnig because you have a chip which is capable of overclocking (not on the long run XD), and your timings are wrong because you probably have a factory BIOS version, which tends to be outdated even at new boards, and your mobo doesn't heard of your exact RAM model.
Your mobo have set a RAM profile (JEDEC #2), which is used in DDR2 RAMs, all u have to do is adjust your timings to the XMP profile, or simply enable X.M.P. profile in the BIOS cheers!
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17 Jul 2011   #10
sygnus21

Windows 10 Pro
 
 

Quote   Quote: Originally Posted by ganjiry View Post
ok this is how they r at the min. i havent changed anythin as yet. still stock at 1066.
CAS# LATENCY = 7,
RAS#TO CAS# = 7,
RAS# PRECHARGE 7,
tRAS = 20

do i just change them to what they r shown as in the online specs?

CAS# LATENCY = 9,
RAS#TO CAS# = 9,
RAS# PRECHARGE 9,
tRAS 24

Does tRC have to b changed?
also the voltage says at 1600 it is 1.65v instead of 1.50. does that hav to b changed aswell or leave on auto?.
sorry 4 all the questions but im fairly new to pc's and havet had to deal with the bios or changing these kind of settings
Your CPU-Z shows that your RAM is capable of running 1600MHz @ 9-9-9-24 @1.65 volts.

Now if you want to run your RAM at 1600MHz, then yes you'll need to up the voltage else you'll get RAM errors as the RAM isn't getting enough voltage for that speed.

Two ways you can get your RAM to run @1600MHz, @1.65 volts.....

1- Use the XMP profile - to do this you MB's BIOS must have an XMP setting that can be enabled.

2- Manually set the RAM's paremeters in the BIOS.

I personallymanually set my settings even though I can use XMP on my board as I find other voltages get set a little high as well when enabling XMP; but that's another story for another time.

Anyway see these posts to get an idea of where I'm coming from....

Here - http://www.sevenforums.com/crashes-d...ml#post1191297 and http://www.sevenforums.com/crashes-d...ml#post1191432

Also here RAM Performance and RAM Performance
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 not sure about ram timings




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