Memory beginner - Crucial ballistix

chowks

chowks

chowks

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21 Aug 2003
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408
First off I must apologise for being quite the R-tard at knowing about RAM. So sry if my question has been asked a million times before (I did do a search but didnt find anything that exactly matched my query).

I've just upgraded my RAM from the following:

"Crucial 2x1GB 240-Pin DIMM PC2-6400 Unbuffered Non-ECC CL4"

to another 2gb of supposedly the same RAM. However, the new 2gb looks a little different to the older 2gb (but the site i ordered it from says its the same as I used to the same stock code). So, I will be having 4 x 1gig sticks in my motherboard which is an Abit IP35 Pro.

Looking on the forum it appears I will probably need to manually change some settings in the BIOS for this upgrade. Is this true? What will I need to change?

The sticker on the RAM quotes the numbers "800mhz 4-4-4-12 2.0V"

So I presume I change the voltage for each stick of RAM to 2.0V?

Not entirely sure what the other numbers relate to and if I need to change anything else?

Thanks for any help guys!
 
If the new set of ram looks a bit different from the old stuff, it is probably because recently went from double sided to single side chips.

When you fit you 2 new dimms, all you need to do is go into your BIOS and make sure the ram voltage is set @ 2.0v (which should be enough for 4 dimms), you may need to increase NB voltage slightly, and set the timings manually to 4-4-4-12.
 
ok thanks.....how much should I increase the NB voltage by?

edit: also ...looked at my bios and the following list comes up for timings:

- CAS Latency Time (tCL)
- RAS# to CAS# Dealay (tRCD)
- RAS# Precharge (tRP)
- Precharge Delay (tRAS)
- Refresh Cycle Time (tRFC)
- Write Recovery Time (tWR)
- Write to Read Delay (tWTR)
- Act to Act Time (tRRD)
- Read to Precharge (tRTP)

which ones do i change to the '4' timing and which one goes to '12'?

for the voltages my bios manual comes up with a 'Reading' voltage, 'High limit' voltage and a 'low limit voltage for 2 different rows:

1. DDR2 Voltage
2. DDR2 VTT Voltage

which one do I change to 2.0V ?
cheers
 
Last edited:
You might have problems running the different ram together. Some people on this forum couldn't run it together successfully.
 
The first three are set to 4, and the fourth is set to 12. The rest can be left on auto.


Also remember to up your northbridge/MCH voltage by 0.1v, and set the DDR2 Ref Voltage to +2% to boost the board for running 4 sticks.
 
chowks said:
for the voltages my bios manual comes up with a 'Reading' voltage, 'High limit' voltage and a 'low limit voltage for 2 different rows:

1. DDR2 Voltage
2. DDR2 VTT Voltage

which one do I change to 2.0V ?
cheers
Click to expand...

sorry i think i added this to my post after you posted.

Thanks for all the help
 
ignore above post....found out where to change the values.

Thanks again for everyones help!

hopefully it'll all work out fine
 
Cob said:
Also remember to up your northbridge/MCH voltage by 0.1v, and set the DDR2 Ref Voltage to +2% to boost the board for running 4 sticks.
Click to expand...

managed to install the RAM, change its timings and voltage and all seems to be running great. Just regarding the Northbridge voltage...i changed the value of "MCH 1.25V" from 1.25V to 1.33V as the next value it offered was 1.37V and i know you said to only increase it by 0.1v.

Is this okay?
 
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