Finding the right timings for my TwinMOS Ram

Phunky · 25 Jan 2006 at 15:35

I bought 2x512mb TwinMOS PC3200 (i think late 2003!) and ive never really known what timings these can handle.

Am i right in thinking that some TwinMOS Ram can take really tight timings?

If so does anyone know what type they are and what timings they can handle??

I just run what ever the mobo auto selects at the moe, you can see CPUZ readings for my ram here...

http://images.phunky.co.uk/overclock.JPG

HangTime · 25 Jan 2006 at 15:44

If you've got BH-5 chips (and some others) you can run tight timings.

I have the same kit as you (2*512 twinmos purchased 2003) and I run mine at 232mhz 2-3-6-3 1T. Mine won't even POST when it's set to CAS3, for some reason.

Phunky · 25 Jan 2006 at 15:47

Hmmm will have to have a play then and see what i get.

On another note!

What troubles would i get if i bought another matched pair of RAM to add into my current system?

Im running on a 5:4 Divider due to my overclock, would i be able to put another matched paid in to the other 2 slots and run them ok?

Ive read theres some issuse with having 4slots filled?

HangTime · 25 Jan 2006 at 15:51

Having all 4 slots filled means you have to disable CPC and run at 2T instead of 1T timing. This has a significant detrimental impact on performance.

Phunky · 25 Jan 2006 at 15:59

Well as far as i know im currently running at 2T anyway, i attempted to run my overclock at 1T last night and it just BSOD after about 5mins within windows.

What is CPC?

smids · 25 Jan 2006 at 19:16

HangTime said:
If you've got BH-5 chips (and some others) you can run tight timings.

I have the same kit as you (2*512 twinmos purchased 2003) and I run mine at 232mhz 2-3-6-3 1T. Mine won't even POST when it's set to CAS3, for some reason.

No POST at CAS 3 is usually a sign of BH5. BH5 does not like running at cas3 at all and often fails to post. Remember the good ol' test, 2.8V 2-2-2-5 1T boots = BH5.

CPC is command rate i.e. 1T(enabled) or 2T(disabled) and stands for Command Per Clock.

To find out if you have the right RAM, first, is yours the Speed Premium version and 2nd, what is the long code on the RAM sticker and 3rd, does each individual RAM chip have two dimples in the middle of each module and 2 metal lines running through the cross-section.