UD3R OC

[BTRY B 529th FA BN]

So, i'm trying to run my UD3R with 8gs of DDR2 1000 @ 500fsb

I've upped my vcore and term 1.35 by 1.30 respectively

Put my ram volts and timings to specs. 555,15 @ 2.1v

and now I'm working on my MCH and PLL

MCH is 1.34v
PLL is 1.690v

I know 8 gig is tough on any board even one of the best 775 quad clocking boards (btw, running a Q9650) but this machine will be hosting Premiere Pro CS4 for AVCHD editing... and i'm trying to cut the cost of an i7 system by not building one atm.... (to be continued)

I am just curios if there are safe limits to these two adjustments

Thanks,

529th - retired WWII Batallion

 

[lopri]

You have a Q9650 and why would you need 500FSB? (aiming for 4.50GHz?)

 

[BTRY B 529th FA BN]

video editing generally runs better the higher the fsb. I was able to hit 500 using 2x2gb sticks but 4x2gb sticks just doesn't seem to wanna work. I'm about to jump on an i7 system here in a minute

EDIT: i7 board recommendation? non asus preferably

 

[BTRY B 529th FA BN]

Got it working @ 400fsb

trying
1.5 MCH
1.71PLL
for 500fsb

EDIT: had a 10 second AVCHD clip running smoothly on Highest quality

 

[lopri]

Hmm.. I don't know. Even if there is a difference, I'd tend to think it's like splitting a hair. I'd personally try to maximize the investment by going with x9 multi. What's the target CPU frequency? 3.5GHz (7x500) or 4.0GHz (8x500)?

 

[BTRY B 529th FA BN]

At stock, that same 10 second AVCHD clip would rubberband/stutter on high quality in PP CS4. When I ran it at 400fsbx9 it ran that same clip smoothly at high quality at full desktop view 1280x1024. So from 333fsb to 400 makes a dif.

I thought of trying to level the field isolating the fsb to double check what I heard and If I get it running i'll bump the multi from 7 down to 6 to test that statement.

EDIT: just worried right now at the temps. 73* on LinX w.custom h20 - sheesh

 

[elconejito]

Hmmm, your PLL is a lot higher than mine.

I'm currently at 450FSB, with MCH at 1.34 and PLL is at 1.5.
I think at the current speed, I feel like I can actually bring that MCH value down a bit, I haven't had time to test it out.

When I was googling around a few months ago, I saw many PLLs at 1.57. i think the default value is 1.1(!). Except for those running exotic cooling, I never saw any values higher than 1.57 or (I think) 1.59. I forget what this value does, but increasing it doesn't seem to influence that much.

When I was testing for FSB, I took it up to 485FSB at only 1.3v MCH with 6x multi on the CPU. I didn't go any higher because at the time my target was 450-475, so i just wanted to make sure I could get past that. When i go on my staycation next week I'm probably going to spend a few days fiddleing with my OC.

 

[BTRY B 529th FA BN]

This Q9650 I have in this machine needs alot of vcore for 500fsb. It needed the same when I ran it at an 8 multi x 500 with 4g Now it re-needs the same vcore with 8g and 7 x 500fsb

 

[BTRY B 529th FA BN]

PLL = 1.710
MCH 1.5v

 

[n7]

Waste of time trying to get 8x500 stable w/ 8 GB.

It's likely possible, but it'll be hugely difficult, & will require way more motherboard voltages, especially MCH/VTT.

The silly thing is, you have a 9x multi, which means you can do well over 4 GHz with a lower FSB, & less voltage abuse on the mobo.

Other than synthetic benchmarks, you'll see a far bigger difference running a few extra MHz than you ever will with the higher FSB.

I'd say stop limiting yourself.

8x500 w/ 8 GB = why bother.

You could be doing 9x456, or 9x467 w/ 8 GB with far less mobo abuse, etc, & gain far more performance for your video work than FSB ever will...

 

[Shmee]

Originally posted by: n7
Waste of time trying to get 8x500 stable w/ 8 GB.

It's likely possible, but it'll be hugely difficult, & will require way more motherboard voltages, especially MCH/VTT.

The silly thing is, you have a 9x multi, which means you can do well over 4 GHz with a lower FSB, & less voltage abuse on the mobo.

Other than synthetic benchmarks, you'll see a far bigger difference running a few extra MHz than you ever will with the higher FSB.

I'd say stop limiting yourself.

8x500 w/ 8 GB = why bother.

You could be doing 9x456, or 9x467 w/ 8 GB with far less mobo abuse, etc, & gain far more performance for your video work than FSB ever will...

My thoughts too.

My friend has a Q9650 and UD3P with a megalems. He also has 4 sticks of ram. He got it stable at 4 Ghz, but not at 4.1, with any vcore. So we both thought he needed more MCH or FSB voltage, considering he has 4 sticks of ram and running a high fsb quad, but werent sure what the safe limits were for, for NB specifically.

His handle is faxon BTW.

 

[BTRY B 529th FA BN]

My only reason again in doing high fsb is because of working with AVCHD. And in trying 9x400 or 7x500 there is no difference in voltages requiring it for stability. 9x400 put me beyond the vcore safe limit already. I really hate abusing it like this. Makes me think I should just sell this off and continue with the rest of my i7 build. I already have the chip. All I need is a mobo and ram. The other part that saddens my i7 build is I'd have to re-install everything to get it working properly on an X58 board. Sometimes I think I should just scrap this & plunge into asshole motherboard & ram costs for an i7. Really the one thing that is holding me back is the mobo choice. I like the UD3R X58 but the 4 dimm slots are making me hesitate.

 

[elconejito]

I think you're pouring too much voltage into that thing myself. Is there a reason you have such a high PLL? From everything that I've seen (granted this was a few months ago) the PLL didn't make that much difference. The keys were Vcore vs CPU Termination vs MCH. And for really digging out the last few mhz the CPU and MCH reference voltages.

So if i follow right, you're at
vcore 1.35
CPU Term 1.3
PLL 1.71
MCH 1.5

Is that accurate?

If it were me I'd bump CPU Termination a few notches (not above 1.4v though or the internetwebs says you'll kill that chip). I'd lower PLL to 1.57 and maybe go one higher or lower. And I'd drop that MCH down to 1.34 and go up to 1.4.

If that doesn't get you to 500FSB, how high does it get you?

 

[BTRY B 529th FA BN]

I'm going by a rule of thumb i heard and that was always keep the cpu termination -.500 from the vcore

I've settled for now with 1.32500v (droop to 1.296vcore), 1.260v termination, pll 1.630v, mch 1.40v, vdimm 2.10v = 400x9

I was able to do a stable 500fsb x 7 with 8g but with alot of vcore

 

[elconejito]

was it .5 or .05?

 

[BTRY B 529th FA BN]

? hmm i might of wrote that wrong. .050v it is