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Discussion Starter #1
currently at 800Mhz 5-5-5-15 1:1 using 2.25V, how high can these rams go without killing it? is 2.25V on these rams ok? cause i dont even know whats the stock voltage on these rams.
 

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I have the same ones as you. I have never had them up that high. Stock volts should be 1.9V at 667/675. I am not sure the "max" volts on them though. Impressive RAM OC there!
 

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Discussion Starter #3
thanks for the reply, i just put the volt down to 2.00V and its still running fine so i will keep it at that.
 

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I think somewhere on Corsair's website it says that max recommended voltage is 2.1v. Ill try to dig up the link.

Ya here it is:

Testing parameters for Twinx/XMS2-5400C4:
CM2X256-5400C4 Data Sheet
CM2X512-5400C4 Data Sheet
TWIN2X1024-5400C4 Data Sheet
Motherboard make and model: ABIT AA8 Durramax and/or Asus P5AD2 Premium
Each pair is tested and packaged together using the following settings:
CPU External Frequency: Manually set to 250MHz
DDR2 SDRAM Clock: Manually set to 533MHz
DRAM Timing Selectable: Auto Yields the following timings
SDRAM CAS Latency: 4T
SDRAM RAS to CAS Delay (tRCD): 4T
SDRAM Row Precharge (tRP): 4T
SDRAM Active to Precharge Delay (tRAS): 12T
DDR2 SDRAM Voltage: 1.9
NB Voltage 1.9 Volts (On Abit AA8 Only)
All other settings are motherboard defaults.
Maximum DDR2 recommended VDIMM: 2.1 Volts

This was found at: http://www.houseofhelp.com/forums/sh...ad.php?t=52351
 

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Quote:


Originally Posted by laziboi

currently at 800Mhz 5-5-5-15 1:1 using 2.25V

Here are mine with a 2.20v:



I would use a 2.30v but my CPU won't go any higher. Also, update your BIOS to the 0711.
 

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Discussion Starter #7
thanks for the replys!!!

Nasgul: people are telling me 1:1 is faster but loosening timings are slower which mine is at 5-5-5-15 so will it be better for me to keep it at 1:1 800Mhz 5-5-5-15 or overclock my cpu more and do a 2:3 442Mhz 4-4-4-8 @ 2.2V like yours?
 

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If you're going for a 1:1 ratio (which I'll never use nor recommend), then you can use the 4-4-4-8 timings and a 2.1v as max. I only gave mine a 2.2v because mine are running at 442mhz, up from 333mhz and the 1.9v stock.

But you need to get out of the 5-5-5-15 immediately IMO.
 

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Discussion Starter #9
so i just go into bios and leave cpu speed at 400x7 1.400V and set the memory voltage to 2.1, go into the chipset section and set...

DRAM CAS# [3]
DRAM RAS# To CAS# Delay [3]
DRAM RAS# Precharge [3]
DRAM RAS# Activate To Precha [8]
DRAM Write Recovery Time [6] <- DEFAULT
DRAM TRFC [42] <- DEFAULT
DRAM TRRD [10] <- DEFAULT
Rank Write To Read Delay [10] <- DEFAULT
Read To Precharge Delay [10] <- DEFAULT
Write To Precharge Delay [10] <- DEFAULT
 

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Discussion Starter #10
woohoo updated to the 0711 bios and i dont get the double restart problem no more! thanks for telling me to update Nasgul!
 

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I'm glad you got the 0711, the previous versions were annoying, I couldn't take that reboot problem anymore, it was making me crazy.

But ASUS just released the 0804, how and where did you get the 0711?
 

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Nasgul: so do i set 2.1V and 3-3-3-8-42-10-10-10-10 in bios? you sure those timings will work for me? cause the pc wouldnt even boot when i use to have it at 4-4-4-12 800mhz.

i got the bios at www.asus.com, i still get the double restart but it only happens when i completely shut off the pc then turn it on again. if i just reboot normally from windows then it wont double reboots so thats a good sign.
 

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Quote:


Nasgul: so do i set 2.1V and 3-3-3-8-42-10-10-10-10 in bios? you sure those timings will work for me? cause the pc wouldn't even boot when i use to have it at 4-4-4-12 800mhz.

You can't use CAS3 @ 800 speeds, so you have to use 4-4-4-12. Now why wasn't it booting? beats me but my RAM boots up to 442mhz w/o a glitch.
Try using a 4:5 ratio.
 

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Quote:

Originally Posted by Nasgul View Post
If you're going for a 1:1 ratio (which I'll never use nor recommend), then you can use the 4-4-4-8 timings and a 2.1v as max. I only gave mine a 2.2v because mine are running at 442mhz, up from 333mhz and the 1.9v stock.

But you need to get out of the 5-5-5-15 immediately IMO.
why? isn't 1:1 better for Intel processors?
 

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1:1 and also 4:5 are good. There's not really a "good for" when Intel CPUs benefit more from bandwidth than anything else.

I've used 1:1, 4:5, 3:5, 3:4, 1:2 and now I'm at 2:3, in every case I've seen from zero difference to a nano size difference, so it doesn't really matter but if you prefer a 1:1, it's okay.

For me, it's a matter of pushing every component to its limits and I prefer pushing RAM as far as I can and that can't be attained with a 1:1 ratio.
 
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