Cant overclock since installing Dual Channel DDR!

[Steveio101]

Cant overclock since installing Dual Channel DDR!

Machine Spec

Gigabyte GA-K8NSC-939 mobo
AMD Althon 64 3000+ Venice Core (a real shame to not be overclocking this now!)
1 GB DDR PC3200 • 2-2-2-6 • UNBUFFERED • NON-ECC • DDR400 • 2.8V • 64Meg x 64 - Running in dual channel mode
ATI Radeon 9600 266MB core:527mhz memory:297mhz
Onboard 8 channel sound with Spdif output
SAMSUNG_SP1614N 160gb 7500rpm HDD
Liton Dual Layer DVD+-R
Aopen 52x CDRW
300w PSU
Samsung 73v 17" TFT

Basicly until recently i was running the above spec but with 1 basic 512mb pc3200 chip and one 256mb pc3200, both unknow origin definatly not matched! however even with such rubbish memory i was abole to overclock the stock 200mhz HTT speed up to 240mhz with absolutly no issues.

Since fitting the new memory i cant overclock at all without an unbootable system!

anyideas?

im thinking the 300w PSU isn't man enough for the job maybe!

 

[RedDragonXXX]

TO THE FORUMS

Try rasing your Vdimm and relax the timings, but yes 300W is not sufficent enough for that system.

What are the rail readings?

 

[Steveio101]

right off to the shops for a better PSU!!

 

[RedDragonXXX]

If I were you I'd look for a single 12V rail PSU that has more then 30A.

 

[Steveio101]

Rail readings acoring to Speedfan are:

+3.3v = 3.14v
+5v = 3.44v
+12v = 12.22v
-12v = -6.19v
-5v = -3.08v

crap and they are all fuctuating by + or - at least a volt!!!

 

[RedDragonXXX]

Yea, that's not to good. Do you know how many Amps is your current PSU on 12V rail.

 

[Enablingwolf]

Gigabytes are notorious for reading low on voltages. Every one I owned read low.

I used a DDM on my board and it shows good. The sensors gives me on my 5v line 2v readings. I know my drives would not even spin if it was really that low. 12v is not so bad. Sometimes it acts wierd though.

The temp sensors are much better on a Gigabyte. I had good luck comparing against a probe. Actually they tend to read on the low side actually.

 

[Steveio101]

What should i relax my spd timings to then? they are currently

2-2-2-8

 

[darkcrystal]

sorry if i missed it, but what brand is it? are the chips TCCD or BH-5??! and yeah, you could def. use a new psu!

 

[Steveio101]

hmm not sure what the chips are all i know is that this is what i have!

http://www.crucial.com/uk/store/partspecs.Asp?IMODULE=BL2KIT6464Z402

 

[darkcrystal]

ok it appears to be TCCD chips (low voltage, loose timings)
go ahead and take a look at this article. it may be helpfull for your situation.

 

[Steveio101]

Right, borrowed a 650w psu from a friend! aslo tried relaxing the spd timings to 2.5-3-3-8
with no luck

also tried putting the dimms into un paired slots to force it into runiing them single channle, but still i cant get the HTT speed past 209mhz without freezing!

 

[Romulox]

Could you post your bios settings for us? It might help and I have a feeling something got reset to make it unstable.

 

[Steveio101]

how can i do a screen print of my bios?

 

[Romulox]

Do you have a digital camera to take a picture or write it down.
We don't need the whole thing just the cpu and memory related section.

 

[Steveio101]

ok good idea

 

[Steveio101]

sorry! phone pictures!

 

[Romulox]

This first thing for your OC is to
use dividers to test the new memory
lower ht x 4 until 250 fsb then to x3 for #> 250
set everything to manual
you need to find the cool n queit function and disable it
there are secret otptions I forgot, hit shift+F1, then alt+F2
if NV/ati speed up is enabled diasble it.
figure out the votlages you need

Edit
I just realized this a nofrce 3 board
make sure the memory is in slots 1+2
this can really effect the overclock

 

[Steveio101]

yup nforce3!

cant find any secert options in the bios! also there are no cool n quiet controls and no NV/ati speed up

i have downloaded gigabyte tune easy 5 to play about with clock settings within windows

best results so far have been
HT x 4
215hmz
2.6v

 

[Enablingwolf]

On a Gigabyte hit Ctrl+F1 while in BIOS. Then the secret options majically appear.