OCZ VX Overclocking

[OV3RCLOCK3R]

Hey all. This is the first time i'm using voltage loving ram. OCZ VX:)

I've always been tccd fan but i thought i'd give this a try. So my brother bought me this set for my b'day and so far i am liking it very much. Much Much easier to set up than tccd.

my current specs are:
3000+ winchester CBBHD 0448 SPAW
Dfi ultra-d with bios 704-2bt
OCZ VX 3200
X800xt pci-e vivo
audigy 2 zs softmodded to audigy 4 pro
Hiper 580w Type-r blue Modular

and here are my results so far. Dram voltage is set to 3.2 but it overvolts to 3.3.....

http://img215.imageshack.us/img215/977/moststable5og.jpg

:)

Can i get more out of these? memory is cooled by a 120mm fan and they are cold to the touch.

Oh and if i am running the cpu at 300fsb or over. Wht divider would i need so it runs between 260-250.

Thanks in advance:)

[Celcius]

If your running at 300fsb, a 5/6 divider will put your ram at 250fsb. 310fsb with 5/6 divider puts ram at 258.33fsb. Basically, the 5/6 divider will work for you. You can push that ram farther but you may need to raise the volts.

[OV3RCLOCK3R]

wht would u say be the best volts for running 24/7 and are my timings ok or do you think i can tighten them up more?:)

[CCUABIDExORxDIE]

you can run around 3.4-3.5v for 24/7, as long as cooling is good, which is appears to be.

[Celcius]

and your timings look good. Let me know when you get your system tweaked. I'd like to compare 3dmark scores. ;)

[OV3RCLOCK3R]

and your timings look good. Let me know when you get your system tweaked. I'd like to compare 3dmark scores. ;)

Sure thing boss, i'll send you a pm when its done:)

[vapb400]

I hear if you turn off the 50 cent and listen to some real rap you can hit 300 2-2-2 @ 3.2. :)

[[XC] moddolicous]

Looks like a good set. 3.5 will be OK if they are cooled well. Try some of these times: idle cycle limit: 0, trfc-12, and tref- 100mhz 1.95us. Should get you under 32min (hopefully) at the same clocks.

[largon]

- - Try some of these times: idle cycle limit: 0, trfc-12, and tref- 100mhz 1.95us. Should get you under 32min (hopefully) at the same clocks.tRFC 12 simply will not work on VX (CH-UTT), it might even boot with it but there is no way it can handle it stable.
1168 / 166MHz 7.8us is much better value for tREF.

[fearo]

tRFC 12 simply will not work on VX (CH-UTT), it might even boot with it but there is no way it can handle it stable.
1168 / 166MHz 7.8us is much better value for tREF.

VX changed to BH-5 months ago...

[Vapor]

It did? That would be news to a lot of us....

I know GX has been BH-UTT (fwiw, BH-5 is no longer made), but VX has been too?

[largon]

VX changed to BH-5 months ago...
Incorrect (http://www.xtremesystems.org/forums/showpost.php?p=1106703&postcount=257).

[Celcius]

I hear if you turn off the 50 cent and listen to some real rap you can hit 300 2-2-2 @ 3.2. :)
LOL, probably true :D . just kidding :p: ...

[largon]

OV3RCLOCK3R,
All you ever want to know about VX can be found here (http://www.xtremesystems.org/forums/showthread.php?t=47990&highlight=ocz+memory+made).

[OV3RCLOCK3R]

Thanks people for all your help.

I hate 50cent , but my cuzing loves him so he was listening to it.

I've tried trfc 12 and pc didnt boot. I'll try idle cycle limit and tref.

btw, wht does this tref- 100mhz 1.95us in bios mean? (e.g 1156, 2336)

thanks

[Supertim0r]

my set of vx3200 sucked and died in 4 days but my current set of VX4000 run @ 260fsb 1.5-2-2-5 @ 3.26v 24/7

3.4-3.5v is safe with active cooling
tried to "burn in" your memory ?

[Celcius]

btw, what does this tref- 100mhz 1.95us in bios mean? (e.g 1156, 2336)
thanks

3684= 100mhz(1.95us)

[OV3RCLOCK3R]

my set of vx3200 sucked and died in 4 days but my current set of VX4000 run @ 260fsb 1.5-2-2-5 @ 3.26v 24/7

3.4-3.5v is safe with active cooling
tried to "burn in" your memory ?

Havent done any burning in wht so ever?

/noob/Whts the best method on burning in VX?/noob/


Oh and thanks celcius. Will try it in a sec :)

[pazza316]

To burn in VX I run memtest looping tests 5 and 8. I also loop the entier thing. Just leave it running on memtest overnight for afew nights. While you sleep they burn!!!!

[fearo]

Incorrect (http://www.xtremesystems.org/forums/showpost.php?p=1106703&postcount=257).

In that link Andy just says nothing's changed on VX memory, that the timings didn't change. He is referring to Mushkin running out of CH-5 yes, but I am pretty sure they (OCZ) switched over some time ago. I have the value VX right here which have always had the same chips as the VX and they're BH-5. Unless they switched over again?

[fearo]

-edit.

[largon]

In that link Andy just says nothing's changed on VX memory, that the timings didn't change. He is referring to Mushkin running out of CH-5 yes, but I am pretty sure they (OCZ) switched over some time ago. I have the value VX right here which have always had the same chips as the VX and they're BH-5. Unless they switched over again? I bet your value VX has BH-UTT, not BH-5.
Where do you think OCZ puts those BH-UTT chips that don't reach the GX-serie bin? I doubt they'd throw them in garbage. ;)
You boys are jumping at shadows here. The VX chips have not changed - -Huh? :)

[fearo]

I bet your value VX has BH-UTT, not BH-5.
Where do you think OCZ puts those BH-UTT chips that don't reach the GX-serie bin? I doubt they'd throw them in garbage. ;)
Huh? :)

Of course my value VX are BH-UTT, which is just another term for new BH-5. :) What you say about the GX series is quite interesting, but I have had my value VX from before the GX series was existant. AndyOCZ was also referring to the SPD timings and/or the use of other (non-UTT) chips when he said the VX series hasn"t changed, so that is quite irrelevant.
I don't know, if you are so sure, you're probably right, anyway it's not worth discussing about as they both clock superbly.. :p:

-fearo

[PsYkHoTiK]

Hi,
i'm new here so don't pick on the newbie... :p:

I've been playing with some PC3200 VX modules and they're great! :D

I managed to get em up to 260MHz using the 1:1 divider (3.5v 2-2-2-10) and thats great considering these are DDR400 modules. Stock voltage, I got em up to 248 stable.

Of course, I did burn em in for over 40 hours before that.

I'll post screenies when I get home and prolly contribute to the UTT stable clock thread... :toast:

[Reefa_Madness]

With respect to the questions about whether VX uses BH or CH UTT, if you read the thread on the new OCZ heatspreaders, the topic comes up throughout the first few pages (#2-#5) and the impression that I get from reading the posts from the OCZ guys is that the VX still uses CH die, while the GX uses BH die.

They don't come out and post that statement exactly, but the comments made by the reps lead me to conclude that.

http://www.xtremesystems.org/forums/showthread.php?t=77917&page=1&pp=25

[Freez]

Am I the only one who cant get a set of VX to be stable at anything over 235?

[largon]

Freez,
No (http://www.xtremesystems.org/forums/showthread.php?t=47990). :)

[KingYubbo]

Very unlucky if you can't get over 235Mhz on your VX. I have the VVX and i can get up to 260mhz @ 3.6v. Might be some really unlucky batch. Mines 0517 which i think was pretty early when the VX started putting Winbond UTT BH-5 chips in.

[largon]

KingYubbo,
What makes you think your VX is BH-UTT? I don't mean it wouldn't be but why do you think it is BH-UTT?

[KingYubbo]

well... if i recall, it says it on the chips? Plus BH-5 are good at lowerish volts eg. 2.9v-3.4v, and CH-5 (3.4v+) are good at higher voltages. As i can only get up to 250Mhz on 3.5v, i'm assuming mine is UTT-BH-5.

[[XC] Jaco]

Kingyubbo

if your ram can do 200MHz 2-2-2-5 @ 2,7vdimm than it's BH UTT
CH UTT needs more vdimm to do that

correct me if i'm wrong largon :)

[fearo]

What am I hearing, Largon :p:

[largon]

Jaco, KingYubbo,
More reliable method to determine the die type is to use following settings:

DDR480-DDR500 2-2-2-x @ ~3.3V with tRFC 12

CH-UTT won't even boot with tRFC 12.
BH-UTT on the other hand will boot and likely is even Memtest clear at those settings.
Please feel free to report your result regarding the tRFC 12 with VX.well... if i recall, it says it on the chips? - - As i can only get up to 250Mhz on 3.5v, i'm assuming mine is UTT-BH-5.VX chips are blank. And no, one can't conclude the die flavor based on just by scaling of the module.

[KingYubbo]

ah right, well it boots at 2.8v 2-2-2-5 so ii'm guessing it is BH-5.

[largon]

Hmm. Strange. Never saw this coming:
I just actually proved my self wrong about the tRFC 12 @ 200MHz issue. I just ran some Memtest's with these settings:

2-2-2-5 tRFC12 208MHz @ 2.5V:

Memtest86+ 1.60 was clear for all tests except #5, #7 and one single error in #8. Tests 1,2,3,4 and 6 yielded 0 errors with multiple runs. I tried tRFC value of 11: everything went well until to the point where Memtest should load.

My sticks are TwinMOS guaranteed CH-UTT (AA4T) week 48 year 2004.

However, running high frequencies with tRFC 12 seems to be impossible with CH-UTT: 2-2-2-x 250MHz @ 3.2V with tRFC 12 won't even POST. Upping tRFC to 14 and Memtest86+ runs perfectly. BH-5/UTT can do tRFC 12 @ DDR500 easily.