Prescott 2.8 Overclocks, But Dislikes My UPS!

[FesterSilently]

Hey Folks,

Just got a Prescott 2.8 yesterday, and after a day of voltage/FSB finagling; settled on 250 FSB and 1.45 vcore stable (I *think*!). I was able to get 'er up past 260 with more voltage and mess around in Windows for a wee bit, but wouldn't make it through Prime95 for long. So...
In any case - I probably could've stabilized it a little better above 250 if it weren't for my patience wearing thin because of my frigging CyberPower 900AVR UPS screaming bloody murder at random intervals the entire time! According to the solid beep-tone and the pretty widdle light on the side of the battery backup, it seems to be "overloaded" now and again. Apparently by the wee little Prescott. Now, I know it (the Prescott) puts off more heat compared to my 2.4c (that ran at 268 FSB on stock voltage), but I also know that it's taking up a little bit LESS voltage (1.45 as opposed to 1.5, neh?). So what's the frigging deal, eh?
I'm willing to invest in an even more outrageously priced UPS (1500AVR = $250!) if need be, but I'd rather not as I don't understand why this is happening. Shouldn't the brunt of the power fluctuation be handled by my power supply? Am I (at times) using more than the 550 watts that my Antec is rated for? Will a PC Power & Cooling 510 Deluxe help? Somebody please kick me - I'm not wealthy enough to really afford any more upgrades at the moment!

Stewing In My Own Juices,
Fester Silently

P.S.

Please ask for any applicable specs that are NOT in my sig...

 

[mechBgon]

Power consumption is measured in watts, and watts = volts x amps. So the lower voltage is not necessarily resulting in lower power consumption if it's pulling more amperage at this new lower voltage. What is being powered by the UPS besides just your computer itself (monitors, network equipment, etc)?

 

[FesterSilently]

Well, I've got my NEC 2141sb AND my Klipsch 5.1's attached on the "Battery-Backup" side of the UPS, as well as the computer itself. I'll try switching the Klipsches to the "Surge-Only" side and see what happens.

Of course, I *shouldn't* have to do this in the first place, but...whatever...:disgust:

 

[mechBgon]

Maybe your CyberPower unit is giving out, or is a little overrated. At work a couple weeks ago, I had the following running off of my 1000VA APC BackUPS Pro:

• Athlon64 3000+
• AthlonXP 1800+
• Xeon 2.4B
• Planar 17.4" LCD
• HP ScanJet 7400

I actually didn't intend to cram this much stuff onto one UPS, it was accidental... but it never let out a peep.

 

[Wiz]

How fresh is your battery?

What's the rating for constant draw in watts? I know it says it's a 900 but what's the real rating for constant draw?

If your battery isn't fresh (getting old) it will diminish the constant draw capability and you wil get alarms.
Add up the watts being drawn from all devices, see how close you are to the limit.
Suggestion: Get a smaller UPS for your monitor and other stuff and run them off of it, you can pick up a smaller unit cheap.

 

[LTC8K6]

I don't understand why the UPS would care about the load unless the power was out.

It's not powering anything with the battery unless you lose power, so I don't see how it can be overloaded at all.

 

[Nemesis2038]

Turn off your overclock and try it. If the interface is USB its sometimes messed up by the clock rate of overclocking. This is common in USB but more commonly seen in Firewire devices like video camera's when extracting video causing blue screens. If the normal clock rate doesnt correct the problem then I suspect your UPS battery is bad or doesnt hold a charge. It may have been on the shelf too long. Ask the store to swap it out with another.

Also try simulating the problem by having your monitor plugged into regular outlet and the computer connected to the UPS. If the power lasts then it may be your monitor sucking the power out faster than you expected and a bigger UPS may be in store.

I look at a UPS as I am happy to have my machine safely shut down during a power outage. Mainly because I want my PC to work when I power it back on. We get a lot of brown outs in my area and I have my PC set to 1 minute power outage then shut down. I Figure if the power goes out for that long its going to stay out or come up and down several more times. A brown out is only a few seconds at most and not effected by this.

 

[Wiz]

Actually it is inverting the DC from the battery to run the load - that's why there isn't an interruption when the power goes out. If the battery is weak then the charging circuit will overload and you will get alarms. That's the simple explanation, excuse me for all the details that are left out.
Not all UPS's operate exactly the same, but this is the general principal.
I've owned everything from a 300watt UPS up through a 8.5 KW UPS and all of them operated this way.
The 8.5 KW unit could only be moved around with a forklift, it was really cool but a bit too big for my needs So I sold it.

 

[FesterSilently]

I put the P4c 2.4 back in and I'm happy with it. The Prescott DID NOT perform badly in my opinion, just not as well as *I* wanted it to perform. Oh, well - just goes to show ya: ya don't ALWAYS need to be on the cutting friggin' edge, neh?

I've got the 2.4 running (quite stably) at 3.25@271 FSB and 1.575 volts. The memory is running at 5:4 ratio so it's running at about 216 with 2-3-3-5 timings.

I ran Memtest86 + v1.15 for six hours and Prime 95 for just as long. I guess she's good to go.

Anybody want a brand new retail Prescott 2.8 for $150? (I paid $165 plus shipping/handling/tax = $187) I've got: the receipt from Zipzoomfly; the plastic case with the heatsink/fan; and the top flap of the retail box with the Product Information sticker/serial code on it.

PM me if you're interested.

Fester Silently

 

[lookin4dlz]

I have a Cyberpower 450SL (I think) & no problems with my overclock. However, I do have a usb DSL modem that probably knocks 100MHz off my overclock...