RAM Timing Explained - Page 3 - Overclock.net

Choggs396 · 05-10-07

cool, I always wondered exactly what those timings meant. Thanks!

this n00b again · 05-21-07

well now i know what they mean how do i choose the #'s

i guess this would be the right place to post this

i have a pc:

E6600
Msi p6n sli - fi
Geforce 6600
ocz2p8002gk -> 2 gigs of dual channel ddr2- 800
http://www.ocztechnology.com/product...m_dual_channel
on x64 vista.

well it was working fine until i put in:
http://www.ocztechnology.com/product...module_2gb_kit

now the PC has slowed down majorily. takes for ever to load vista and i tried to i nstall cpu z id but its so slow i can't even install it. when i look at the cpu useage, its stuck at 100%

now im a n00b but im willing to bet this has something to do with the memory timings, right now its set to auto, because it was always set to auto and it worked fine.

it says they should both operate at 2.1 volts
the platnium ram timings are CL 4-5-4-15 (CAS-TRCD-TRP-TRAS)
and the vista upgrade tiimings are CL 5-5-5-15 (CAS-TRCD-TRP-TRAS)

now since its probably because of the ram and its set on auto in bios, i can change to manual, but what should i put in for the number when i put in manual timings?

also when i put in the manual timings, there are about like 10 other numbers that i dont have the digits to because in manual mode alot of settings come up but i only have 4 numbers. so w hat should i do about those? should i just leave those the default numbers?

thanks in advance! hehe

apvm · 11-18-07

A little confuse here after reading this...my max fsb is 320mhz and I have DDR2-800, I am running ram at 10:8 which is exactly 800, 1:1 means 640, so should I set it back to 640 for 1:1 ? Tia

drjoey1500 · 01-12-08

CesarWilkins · 02-17-08

Cas 3 is the safe, I had a mix of cas2.5 512 and cas3 512 both running at ddr400 and cas2.5 for more than 2 years, the cas3 got bad, later i paired the cas2.5vdata ram whit a cas2.5 kingston and they worked like dual channel

Llarion · 02-22-08

Great explanations, thanks!!

Acroma · 07-31-08

so, when some one states the ram runs at 5-5-5-18. What do each # stand for, because i have alot more settings then just the 4 in the bios.

Thanks in advance, +rep to whoever can help^.^

Edit*
Also i am Using A-data ram, and would like to know the limit of these settings and if i have to change anything els if i change those settings.

NMA3 · 08-25-08

what would you ppl recommend me to do!
run my ddr3 @ 1066 with 7 7 7 21 timings
pr run it @ 1333 with 9 9 9 24 timings , it is corsair ddr3 working ant 1.7 volts,
and how much i can push the timings @ 1333 mhz?
THX A LOT!

vetta2000 · 1 Week Ago

I was going to ask, but i found out the answer on kingston's site so i figured I'd share...this has been bugging me lately because I didnt know what each number represented:

Quote:

The information below will help illustrate the appropriate settings when adjusting the memory timings in the motherboard BIOS for optimum performance. Please note that these settings may vary depending on motherboard make/model or BIOS update.

Sample:

Part Number Timings
KHX3200A/512 2-3-2-6-1

Timing Definition Abbreviations What it does

2 CAS Latency CL Delay between activation of row and reading of row
3 RAS to CAS (or Row to Column Delay) tRCD Activates row
2 Row Precharge Delay (or RAS Precharge Delay) tRP/tRCP Deactivates row
6 Row Active Delay (or RAS Active Delay, or time to ready) tRA/tRD/tRAS Number of clock cycles between activation and deactivation of row
1 Command Rate CMD Rate Delay between chip select and command

I am going to take a guess and say that if there are settings that you dont see here you should just leave them on auto, and only set what you know.

18 is # 1 · 5 Days Ago

2x2GB Powerchips need a tRFC of 50-65
This includes most of the 2x2GB kits on the market.

02-22-08	#26 (permalink)
Llarion New to Overclock.net Join Date: Feb 2008 Posts: 9 Rep: 0 Unique Rep: 0 Trader Rating: 0	Great explanations, thanks!! __________________ Cheers, Phil ============ www.llarion.com Antec Sonata III/500w Q6600 (FSB=319MHz, PCI=105MHz - 2.86GHz) Abit IP35 Pro nVidia 8500GT 4GB (4x1) Patriot PC2-6400 (4-4-4-12 2.2v) AC Freezer 7 Pro 160GB SATA II system 1TB SATA II Data 500GB SATA II Backup 320GB SATA II Temp/swap 1TB USB MyBook - Archive MOTU 8pre

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RAM Timing Explained

11-18-07	#23 (permalink)
apvm New to Overclock.net Join Date: Nov 2007 Location: Canada Posts: 43 Rep: 3 Unique Rep: 3 Trader Rating: 0	A little confuse here after reading this...my max fsb is 320mhz and I have DDR2-800, I am running ram at 10:8 which is exactly 800, 1:1 means 640, so should I set it back to 640 for 1:1 ? Tia

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