How tune OCZ PC4000VX @ 250Mhz ?!

[Murdock_TF]

Hello,

i received my new memory yesterday. It's the OCZ PC4000 VX Dual Channel Kit. Now i tried to gain them stable @ 250Mhz with 2-2-2-x @ 3,2

Everything worked now, Super-PI 32M is stable and Prime runs also without errors.

Now please tell me how to optimize my memory Setting on DFi NF4.

Bios is the Hellfire modded LL Bios 510-2

I currently have:

http://tobias.ownagi.com/test2.jpg

the rest:

DRAM Drive Strength 6
DRAM Data Drive Strength 2
DRAM Response Time Fast

Thank you
Murdock_TF

[Magnj]

looks pretty optimized to me :)

[jkabaseball]

this is from someone at OCZ:
DFI NF4, Winchester 90nm and OCZ VX memory

Update 3-19-05: With the 310 BIOS installed try these settings. If they don't work for you try the settings right below this (same post).

200
enable
2.0
02
06
02
07
16 or 14
03 or 02
03
02 or 01
03 or 02
0648, 2560 or 3120 (0648 has worked on many systems)
auto
enabled
auto
0
level 8
level 2
7.0
auto
256
disable
16
07
disable

In Genie Bios

240 (start at 230mhz and work up)
auto
16 16
7 (for testing, then adjust for max overclock)
100
disable
1.500v
1.300v (This is about 1.57v, if you need more do not go past 1.45v here, use more the 123% below, there is a reason )
above VID * 123%
1.30v
1.70v
3.3v-3.4v

[gundamit]

Why is Prime reporting your CPU speed as 208x6?

[mikead_99]

Why is Prime reporting your CPU speed as 208x6?

It's not Prime making the estimate, it is the SP2004 wrapper. It just makes bad guesses. :confused:

[Murdock_TF]

Hmm i don't know, think it's a fault of SP2004, CPU-Z shows the right speeds.

Ok thank you so far, i'm glad to received such a good pair of memory sticks, they can reach 250 @ 2-2-2-5 with only 3,2V Voltage on dimms.

If anybody has some more tipps, post them please

[mikead_99]

From where you are in your screenie, it looks like you are doing OK. Here are some values I would think you could hit and still be stable. I would try these one at a time and shake out for stability in between.

trfc: from 16 to 15
tras: from 8 to 5
trtw: possibly from 2 to 1
Max Asynch Latency: from 7ns to 6ns
Read Preamble: From 5.5ns to 5ns
32 Byte Granularity: From Disable to Enable

I can't see if you have Bank Interleave enabled, but you should try that out too for a nice boost if it is stable.

With the exception of trtw, those are values my VX3200 will handle at 250 MHz and 3.2V. I've seen some people manage to get the trtw down too. I'm sure you could also do tcl 1.5. Personally I don't see any real gain from doing so though I do run that way on occasion.

[Murdock_TF]

Ok Thank you,

what about the slots, is there any difference between the yellow and the orange ones'? Does it make a difference when i use the 5V Rail instead of the 3,3V one?

Heared that for 5V Rail the yellow slots are better?!

[Murdock_TF]

What about the slots guys?!

The yellow ore the orange one for my OCZ VX?!

[justwOo]

Try both slots with your memory, orange and yellow... it seems to vary which are better based on the mood of your ram and your favourite colour... so try them both
If you on the 5v rail right now, stay on it, and if your on the 3.3v rail stay on it and just adjust your rails(didnt see your psu in your sig so i dunno)
Generally 3.3v rail with upped PSU voltages seems to be considered safer

[ben805]

stay away from 5v rail if you intend to use that machine 24/7, the VX4000 has UTT/CH chips and they do not handle high voltage/current for long period of time as good as the BH stuff, just do the jumper mod and up your 3.3v rail, make sure you cool those sticks.

[Murdock_TF]

I'm currently using the 5V rail, cooling them with an 80mm airflow. They don't get hot. My Power Supply is an Revoltec Chromus II with 400Watts.

[Murdock_TF]

Hi guys, i'm here again, used the time and test something. I now have 510-2Fix Bios on my board. I use these settings down there, is there anything i can also omptimize, while everything is stable.

http://tobias.ownagi.com/settings.JPG

Drive Strength Level 6 and 2

[uwackme]

My VX's are fine 250Mhz @ 3.2Vm its nice not to have to go higher. Im 4x512M at the moment, they max at 2x512M 260Mhz, but 260x10 is slower than 250x11, as the SD3700 peaks just shy of 2800Mhz on air.

What Tref number are you using in the bios? Im using 1560, seems very stable. Not sure if 1560 does MORE or LESS refresh accesses than 3120.

To reach the same Mhz on NForce2, I need to use 3.45Vdimm, so Ill stick to using VX's on A64.

You are pretty much max'd on the tweaking. Kind of a let down.... being so easy to find and hit the MAX without a great "hunt" for gold. :rolleyes:

Damn you DFI!!!!

You're next assignment Mr Phelps is to get yourself a better CPU so you can use 250Mhz x11 :fact:

[Aleman]

No tRFC at 12? ;)

tRRD 00

[railer]

will these run fine on Intel system? Has anyone ever tried them with Intel?

[Murdock_TF]

trfc 12 doesn't work, but TRRD 00 works fine so far!

Thank you guys, if anyone has some more tips, please tell me.

[mikead_99]

will these run fine on Intel system? Has anyone ever tried them with Intel?

The OCZ guys and some other users were running them up on Intel when VX first came out. They work, just not nearly as nice clocks on Intel. Maybe 240 MHz or so.

Murdock_TF: Looks like those are about tight now. :toast:

[railer]

The OCZ guys and some other users were running them up on Intel when VX first came out. They work, just not nearly as nice clocks on Intel. Maybe 240 MHz or so.
Damn i just got them 2x512 Gold VX. I was hopping for for 255 atlest with my Dothan rig :( I probably will sell or trade them for some 2x512 stuff that runs 2.2.2. timing @250Mhz on Intel. Any recomendation guys?