How far can you push a 3800 x2 939? (Stoopid sick cooling okay)

[Azriel]

What is the fastest a 3800 x2 939 has been pushed successfully? At what settings? I just want to know what I can hope to achieve.

[Samuknow]

Mine has been at 2700 pretty easy. 9.5x285 @ 1.45 V under water Just got my G skill 2x1gig mem. I will see if it will do higher on the mem. My OCZ was only getting about 230 (460)

Been playing around with other combinations. 2700 is still not a tough reach...

[dabaerman]

if the fsb is cpu locked on the 3800X2, how are you raising the fsb beyond 200mHZ? my mainbprd bios allows 200-350mHZ
fsb and other tweaking. I tried 225fsb and after reboot was back at 200. I'm dead set on oc'ing if it can be done.

Ron

[skool h8r]

Originally Posted by dabaerman

if the fsb is cpu locked on the 3800X2, how are you raising the fsb beyond 200mHZ? my mainbprd bios allows 200-350mHZ
fsb and other tweaking. I tried 225fsb and after reboot was back at 200. I'm dead set on oc'ing if it can be done.

Ron

You pushed it too far and it reset.

[Favu]

Fastest sub zero I found

and

fastest water cooled

I could find. I dunno how stable those OCs - from what I see most A64 chips tend to top out around ~3Ghz max

[Samuknow]

1.65 and 1.8 volts. Nice. I do not know that I would go to 1.65 volts. I have gotten mine to 2.85 at 1.55. Do not think it was very stable though.

How about that DFI lanparty....

[Favu]

Niiice... I'm still more impressed by the vapochill unit cooling it though!!

[skool h8r]

With respect to volts, if you have sub-zero cooling, you can push upto about 2.0V. When you start your PC, the fluctuation from no voltage (off) to 1.X V induces an extreme amount of heat, especially in the 90nm chips. Because the power management doesn't come into effect until POST (or sometimes Windows), this is where most failures occur, or as Windows is loading. With sub-zero cooling, the effects are significantly reduced, sometimes even reversed. That's why those OC's are so stable. the only problem is the power-draw they use, and the price (although that all in one kit in the other thread is only about £80). The nearest thing to a TEC/Peltier, are heatpipes. And the more heatpipes you have, the closer you'll get to ambient temperature. Heatpipes are also the best passive air cooling you can get (currently they are anyway).

As for motherboards, Epox are awesome overclockers and they don't cost an arm and a leg. My 9NPAJ SLI is awesome at overclocking. Most OC'ing problems aren't with the CPU's, chipsets, or graphics clocks. It lies with cheap memory. I mean, even the 2Gb GeIL i have isn't great at stability, but when it gets pushed, it's incredibly fast. I mean, ATM, the memory speed is at 245Mhz at 3-4-4-9-1T. Yeah, the timings are crap, but since it tends to handle clocks better, i decided that to get similar effects to low timings, i would have to get a decent clock speed out of them. And whattaya know, it's fine.

As for CPU's, i've found that setting the max multiplier you can and then upping the clock speed works. But you should set your RAM divider down a step just to get it stable. Then up the CPU a bit more. If you go unstable and you are sure it's not you're ram, set the CPU multi down a step (1 Multi step = 0.5).

Anyway, i think i've rambled on enough

[dabaerman]

fastest water cooled

this one is an AM2. I have Vapochill unit that needs work

started off with small steps . so far @210X10. no voltage adjustment in the
BIOS so stuck @1.4.
I do believe that choosing skt939 because of price has come back to haunt
me a little. DDR2-800 is now cheaper than DDR3200 and the AM2 3800 is
the same price as the 939 3800.

Ron

[Samuknow]

I think I would be scared of 1.65 and 52 C load....

Originally Posted by dabaerman

I do believe that choosing skt939 because of price has come back to haunt
me a little. DDR2-800 is now cheaper than DDR3200 and the AM2 3800 is
the same price as the 939 3800.

Ron

I am in the same boat. I wish I would have went with AM2 also. DDR2 is now cheaper and the CPUs are on the way down. Oh well.

[dabaerman]

I knew going in that AM2 was going to become a lot more affordable later this year. it just happened sooner.
I wanted a reasonably priced dual core folding solution to sktA. I believe my gaming platform will last me until
AM2 is replaced by, what?, Quad Core? DDR3?4?

Ron

[captinhector]

Well, to liven this thread back up.... here is a screen of my single core 3700, All temp readings are correct as far as i can tell(maybe 1 or 2 c off). I am waiting for ups to bring my other high flow 80mm fan so I will keep cool @ 3ghz, but that is where I intend to stop. Oh, and gaming performance rocks now vs. 2.2ghz(stock)!


edit: hehe, forgot to attach the screeny

[SteveI]

Sorry if I missed it, but no one seemed to mention stepping.

Older stepping dual cores avg 2.2 to 2.4ghz. The last stepping (spring of 06 I think) is able to do 2.8 easily.

[Samuknow]

Mine must be the latter. t will do 2.8. Just have to get the voltage a little higher than I want. I am happy with 2.7 @ 1.41 volts.

[SteveI]

Just got mine... week 30 something, 06.

At 2.6ghz so far on stock voltage. I'll push harder after a few days, but not bad for a dying platform that is no longer being supported.

[Azriel]

Found this thread again, through google, while looking into options for my aging chip. I had no idea that decapping was an option on the 939's.

Here's a thread on another forum where a 3800 x2 has been pushed to 2950Mhz @ 1.44v

AMD 0601 UPMW x2 3800+ Results! - XtremeSystems Forums

sick.

I'm going to have to resurrect the old 1800xp so I have a backup if i smush my core.

I'm not hoping for 2900, but decapping should make 2750 or so pretty easy.

this is being done on a zalman 7700. Air colling to a near 50% OC? Two words come to mind: Holy, and ****.

[ccperf721p]

I have a modded single stage unit you can throw on that 3800 if you really want to beat up on it.