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View Full Version : Successful vdimm mod on K8V...

DeathMonk
11-17-2003, 11:03 AM
I did it saturday... It was pretty easy. I set my bios at 2.6 and moved the pot to 2.8v. Now I have 2.8, 2.9 and 3v.

But it doesn't help. Here's how I tested:

Ram at 2-2-2-11, also tried 2-2-2-5, 2-2-2-6 and 2-3-3-7

I set my multiplier to 9 just to make sure any errors were not cpu related.

Started at 220 fsb...no dimm voltage made it stable. Then I went down in 1mhz decreases all the way to 213fsb where I could finally complete a 3dmark01 bench and ran stable. I then moved my cpu back to a multi of 10x. Then it would crash at 213fsb. I upped the voltage to the cpu in small increments all of which had no effect.

I then moved the fsb down more where I reached 210fsb stable at a 10x multi. WHOOP DE DOO.... The same speed I could attain before the vmod.

Either I'm doing something really stupid, or there's something really wrong. Any ideas?
xgman
11-17-2003, 01:51 PM
which ram?
Major
11-17-2003, 02:01 PM
Post some details about your memory like xgman said. It could be that you need to try different Dimm sockets too.
DeathMonk
11-17-2003, 02:10 PM
Corsair XMS PC3500 (1x512MB)... Sorry I forgot that critical detail...
xgman
11-17-2003, 02:15 PM
I believe thaey use CH-5 chips? If so 2-3-2 timings, but you should have seen at least a small move with the voltage. Try a different dimm slot like maj suggested.
DeathMonk
11-17-2003, 02:20 PM
I thought CH-5 couldn't even do 2-2-2-x?

EDIT: I did try 2-3-3-7 though... If it is CH-5, maybe my lowest (2.7-8v) is too much?

EDIT2: Nevermind... I couldn't get any faster at lower voltages before I did the mod...
Major
11-17-2003, 02:23 PM
Try the other dimm's !!!
DeathMonk
11-17-2003, 02:24 PM
Originally posted by Major Slaughter
Try the other dimm's !!!

Will do.:banana:
Evil_Spork
11-17-2003, 03:55 PM
if you do indeed have ch-5, turn cas to ras delay to 3 instead of 2, bh5 doesnt like a C-R of 2.

that should work for ya. i have my ch5 at 2-2-3-11 @ 225 stable all day long.

just put your vdimm as high as it will go and loosen that timing a tad, see what you can do then
tc_overclocker
11-17-2003, 05:14 PM
but I have 1x512MB stick of CORSAIR XMS 3500 and it will do 230MHz FSB fully stable at 11,2,2,2 using only 3.04v
Evil_Spork
11-17-2003, 05:32 PM
worth a try.

my ch-5 doesnt like ras cas =3

i can do 230 2-2-3-5/11 @ 1.85vdimm fine but at any speed 2-2-2-5 is a no go.
muzz
11-17-2003, 06:01 PM
How old are those sticks?
The XMS 3500 uses BH-5 correct (almost positive mine does)?
They should do 5-2-2-2 np, CH-5 hates 2 from what I understand.