Well here goes another Venice OC thread

[e to the x]

Ok So I've been trying for a while not to get my new rig OC'd to a decent level. I had my Venice 3000+ at 2400, and it was stable until I tried a memory bandwidth benchmark using Sandra.

 

I was trying to sort that out and also get some more out of the processor.

 

The settings I had at 2400 were as follows:

 

FSB/DRAM 1:1

FSB 267

LDT/FSB x4

CPU/FSB 9.0

 

CPU VID 1.5 V + 104%

LDT 1.4 V

Chipset 1.7 V

DRAM 2.8 V (its set to that but is only registering 2.6V)

 

RAM timings haven't been changed at all. This was stable except for memory benchmarks. I've run PRIME for a few hours, F@H for days on end, Video Benches, Burnins everything. I am concerned that

 

 

Now to get to 2400 I locked down my RAM at 2:1, LDT/FSB 1.0, CPU/FSB 6.0 and tried to slowly increment the FSB and voltage but I was getting to waht I think is dangerously high. As you can see above I had to run over 1.50 just to get to 2400 and to get higher i was getting close to 1.70 (according to the BIOS)

 

I am using the most current BIOS but can't seem to get past the 270 FSB mark. I kinda just want to hear some thoughts on what you think may be causing the roadblock and how high i can send the voltages before it gets to be too much.

 

TIA

[Dave_Sz]

First of all put your ltd at 3x, 267x4= more than 1000. Second when testing ht set the ram to a LOWER multiplier 133 maybe.

[Metalex]

Yep, definitely set LDT to 3x.

 

Also, why are you running chipset at 1.7v and LDT at 1.4v? I can run at 280HTT with default 1.5v and 1.2v, and I'm sure you will be able to as well. Don't raise voltage just for the sake of it, as you'll only heat things up needlessly.

 

You could well be reaching the limit of your CPU. I can go from default 2000MHz to 2300MHz on stock 1.4v, but to get 2400MHz stable I need 1.5v. To get 2500MHz partially stable I need 1.6v.

 

Eventually you'll have to decide on a good trade-off between voltage and MHz.

[e to the x]

First of all put your ltd at 3x, 267x4= more than 1000. Second when testing ht set the ram to a LOWER multiplier 133 maybe.

 

 

To find the limits of my CPU w/o the problems of having the LDT to worry about. I'm trying to get the highest FSB without other factors.

 

Also, why are you running chipset at 1.7v and LDT at 1.4v? I can run at 280HTT with default 1.5v and 1.2v, and I'm sure you will be able to as well. Don't raise voltage just for the sake of it, as you'll only heat things up needlessly.

 

You could well be reaching the limit of your CPU. I can go from default 2000MHz to 2300MHz on stock 1.4v, but to get 2400MHz stable I need 1.5v. To get 2500MHz partially stable I need 1.6v.

 

Eventually you'll have to decide on a good trade-off between voltage and MHz.

 

I'll see if I can boot with the chipset and LDT at stock but I think back when I started this that upping it helped me get stable.

 

I think I just got a bad batch #. Shoulda gone to handpick the Venice instead of trying my luck with NewEgg.

 

I'm still moving it up. On pause till I get home tonight. I think in trying to find the max FSB again last night I got to 245 with 1.4V * 104%. 250 I had to up the Volts to 1.4 * 113%.

 

I'll try more but I think my stable limit is around 270 FSB. How much voltage can I safely push through there. I have a heavy duty liquid cooling system so heats not an issue for me.

[Metalex]

1.7v is the recommended CPU limit with water, I believe.

[e to the x]

1.7v is the recommended CPU limit with water, I believe.

 

OK thanks. I'll keep that in mind tonight.

[demonR6]

Have you followed the procedure to find your max cpu and max mem yet? Don't feel too bad, my max CPU is 2520 (280*9).. time to get another CPU.

[e to the x]

Well like I posted I locked down everything else to the lowest settings and am just working on the FSB now. After the FSB I was going to do the RAM.

 

I am assuming the method I have in the first post is the method you are referring to.

[e to the x]

I just read another thread on MAx voltage annnddd the kicker was the mention of using the special control instead of just upping the voltage as it tends to be more stable. I will be trying that tonight.

 

Also whats the Startup VID for? Does that need to be tweaked?

[Dave_Sz]

To find the limits of my CPU w/o the problems of having the LDT to worry about. I'm trying to get the highest FSB without other factors.

 

Well, if you leave ldt at 4x you are making it a part of the problem since it is more than the 2000htt bus we have, 267x4=1068, 1068x2=2136. So just like EVERY SINGLE OC FAQ tells you, drop LDT to 3 or 2 when your ht speed is above 250.

[e to the x]

Well I've got it stable at 275. I've run Prime, CPU burn, folding, Aquamark, 3Dmark, sandra burn, superpi, and memory bandwidth tests and its made it through.

 

Chipset was running a bit warm when using PRIME. Close to 70...I may have to back it down after all.

[Guest thavarin]

have you changed anything since your previous settings to reach 275 stable? I am having a ruff time with my 3000+ venice. I can't even get past 220.