Twinmos CH-5 can't run agressive timings?

[felix88]

ok, i just picked up a NF7-S V2.0 and a 512MB stick of Twinmos/Winbond CH-5.

anyway, i want to run the most agressive timings possable at 400MHz or faster, but the best i can do so far is 2/3/3/7 at 2.8v, and i'd like to do 2/2/2/6 or better. i've tried upping my Vdimm to 2.9v, and that doesn't help.

i hear this Twinmos stuff really needs burn in, so i'm running a look of sandra and i'm also running Prime95 and F@H(i know, only one of them is actually getting CPU time).

any help would be appreciated! :cool:

[Tettejaak]

Well, i've heard quite some times on this board that those chips go extremely high, but they don't like agressive timings. Maybe you'll gain some extra mhz with your burn-in, but the for the thight timings you'll need Bh-5 i guess. Well, i wish you luck with the burn-in:) (sorry for the bad english:stick: )

[felix88]

thanks for the suggestion. i hope i don't have to get BH-5. :(

i just read that CH-5 doesn't like high volts, so i'll back that down some and try again.

is the Sandra "burn in wizard" the best memory burn in?

[ryanpgroovy]

Try 2-2-3-5

[CCW]

Felix88, i heard the bh-5 was betetr for lower timings, for a lsit of burning in proggies check here:

http://www.xtremesystems.org/forums/showthread.php?s=&threadid=13050

[felix88]

thanks guys. i just downloaded memtest86. i'm gonna let it run for a couple hours.

how exactly do you burn in RAM? on my CPU, i crank up the Vcore fairly high and loop F@H or Prime95. should i crank up the Vdimm and loop memtest86?

[felix88]

oh, and how about the timings? or should i just burn the stick in at SPD timings, voltage and MHz?

[Swiftdeathz]

generally you run Memtest86 and loop test #5 at highest volts and highest FSB and timings that you can do...

For example my two sticks of Twinmos at first could only do 195FSB at 2,2,3,6 and now I"m up to 220mhz at 2,2,3,5... it won't do TRCD of 2 and that's known with some Twinmos sticks...

You loop memtest86 test 5 overnight or longer if you can and if you got no errors you go up 5 mhz or more and keep doing the same thing...

Also it's best to also after a burning in to go into Windows and test some 3d because sometimes it can do Prime95 and Memtest86 all day but crashes in seconds on 3dmark or other 3d games...

gl

[felix88]

sweet, thanks man.

so i'll just start out at 200FSB 2-2-3-6 and see if it's stable, and then i'll work my way up from there.

i can't mess up a burn in by starting too low, can i?

oh, and it's best to just loop test 5? or would looping all of the tests do the same thing?

[megatron]

Originally posted by Swiftdeathz
it won't do TRCD of 2 and that's known with some Twinmos sticks...
This review confirms that.
http://www.vr-zone.com/reviews/TwinMOS/PC3700-3200/page4.htm
I have BH-5 the does at least 2-2-2-4, @ 200Mhz (only 1.6Vdd).

[felix88]

ok, i dropped it down to 2-2-3-6 and i'm running 215MHz FSB, and it's stable through 1 loop of memtest. i'll try better timings and more MHz later today.

thanks ryanpgroovy, Swiftdeathz and megatron!

[Swiftdeathz]

Originally posted by felix88
sweet, thanks man.

so i'll just start out at 200FSB 2-2-3-6 and see if it's stable, and then i'll work my way up from there.

i can't mess up a burn in by starting too low, can i?

oh, and it's best to just loop test 5? or would looping all of the tests do the same thing?

Well for starters see if It'll run at 200FSB with 2-2-3-5 at 200mhz with 2.9v and see if it'll pass though around 10-20 minutes of Test #5

If it'll do that then it should be good to go for hours... If it fails within that time it's probably gonna get a ton of errors and if you get a ton of errors it's not gonna be a good thing... basically you wanna pass the long burn-in without erroring...

And it's best to loop test 5 only since that's the test that stresses the memory the best...

[felix88]

cool, thanks.

it ran for a few loops at 2.7v, 215MHz 2-2-3-6 earlier. i'll try it at 2-2-3-4 just for kicks. :D

[Zroc]

Actually, there's been entire threads devoted to the fact that tRAS is faster at 7 than at 6 or 5 on the nForce. I think JC found that 14 (!) was fastest, 7 was second fastest.

Another though...are you using a Barton?
I found on mine, CAS 2.5 would crash 3DMark (passed everything else, including memtest), where CAS 2 wouldn't (weird, I know). Same deal with tRAS 6...everything passed (memtest, etc), but 3DMark would would drop.

[felix88]

i'm actually running a XP1800 Tbred B. JIUCB I believe. anyway, it's not too great of an overclocker, but i'm happy with 2.0GHz until my XP1700 shows up.

anyway, i'm gonna do a burn in tonight at 215MHz 2-2-3-5 at 2.9V. i might also try burning in the CPU tomorrow.

[kanedazan]

Hum, I'm quite lost here, a friend brought for me two stick of A-Data pc3200, based on CH-5 , and he tested it at 230mhz 4-2-2 cas2@2.8v , how could this be possible if I follow your feelings?
I've dropped the will to buy OCZ or Corsair, as those A-Data were only 95$ for 512mb, I hope I have not make a huge mistake.

[Nitestorm]

Could be that it's how TwinMOS program their modules that makes their modules with CH-5 chips not like aggressive timings, yet other brands (ie A-Data) are fine?