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Risky Pescott OC? 1.63V 68C/LOAD - Page 2

post #11 of 17
Thread Starter 
Thanks for comment again.

I'd prefer something other than water cooling which probably costs more than budget. What could be reasonable choice? I'm thinking zalman cnps7000B-cu. What is AS5?

Is it normal that temp rises rapidly with loaded works? In my case, idle temp is around 45-50 and once I initiate folding (which takes 50% of cpu, HT), it rises upto 66 just in a minute. But additional load with dual prime2004 doesn't make a big difference.

Also I raised the vcore one step to 1.515 according to prime test failure in around an hour. Now it passed dual prime2004 for around 4.5 hrs.

Other thing I'm concerned is wide range of vcore fluctuation. Even though I set it to 1.515v in cmos, it travels down from 1.45 up to 1.56. Is it normal? Is it probalby assoicated with power supply (200w)?
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post #12 of 17
Quote:
Originally Posted by Moonhill
Thanks for comment again.

I'd prefer something other than water cooling which probably costs more than budget. What could be reasonable choice? I'm thinking zalman cnps7000B-cu. What is AS5?

Is it normal that temp rises rapidly with loaded works? In my case, idle temp is around 45-50 and once I initiate folding (which takes 50% of cpu, HT), it rises upto 66 just in a minute. But additional load with dual prime2004 doesn't make a big difference.

Also I raised the vcore one step to 1.515 according to prime test failure in around an hour. Now it passed dual prime2004 for around 4.5 hrs.

Other thing I'm concerned is wide range of vcore fluctuation. Even though I set it to 1.515v in cmos, it travels down from 1.45 up to 1.56. Is it normal? Is it probalby assoicated with power supply (200w)?
OK. I'll try to help you.

A good air CPU cooler would be either a Thermaltake Big Typhoon, a Thermalright XP120, or a Thermalright XP90, although other coolers may offer comparable cooling.

AS5 is an acronym for Arctic Silver 5 which is a high performance thermal compound, that you put between the heat sink and the face of the CPU. It facilitates efficient thermal transfer between the CPU and heat sink, therefore allowing better cooling and lower temps. AS5 is arguably the best thermal compound you can buy and when it has cured (which takes about 200 hours of computer use) it will give around 1°C to 4°C better temps, then when it has been newly applied.

With Air cooling, rapid jumps in CPU temperature are quite common with fairly high overclocks on CPUs. I had the same phenomenon occur with my CPU and eradicated it by installing water-cooling. It isn't really a problem as such though, just a little perturbing to see, so if water-cooling is out of budget, it doesn't really matter too much.

As you mentioned, vcore fluctuations are usually associated with poor performance from your PSU. I would say that 200W is most definitely not enough power for getting high and stable overclocking from any of your system components. I would strongly recommend that you invest in a more powerful PSU (ie 400W+) that has (crucially) fairly high (ie 30+) amps on its +12v volt rail. I only have a single +12v rail in my PSU, but most overclockers would also recommend dual (or more) +12v rails in any PSU you may get and are probably wise to do so.

Hope this helps somewhat.

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post #13 of 17
Thread Starter 
Thanks

I just ordered Thermaltake big typhoon CL-P0114 at Newegg. What should I consider in upgrading my PSU other than maxium output (Watts) and dual +12v rails?

I'd like to get 4.0G hopely out of PSU change.
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post #14 of 17
Quote:
Originally Posted by Moonhill
I've been ok with 3.5G/2.8G prescott (800/1024, E0) for a while. Today I tried 4G with cmos 1.58v (asus probe 1.54-1.63), fsb 286, ddr320, 2.5:3:3:5:4 timing.

I'm posting this with above setting. As you see, vcore is quite high and temp as well.

Is it really risky? I'm trying to get zalman cnps7000b-cu soon. At this fsb (286), what could be the best settings to get stability?
dont you think its too high?
how bout the stability?
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post #15 of 17
Thread Starter 
Yes, it's high.
So I lowered fsb and vcore down to 272 and 1.525. There is no error with prime2004 (dual) but psu (200w) seems to have a problem, sudden reboot with loaded multiple applications launching.
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post #16 of 17
Quote:
Originally Posted by Moonhill
Yes, it's high.
So I lowered fsb and vcore down to 272 and 1.525. There is no error with prime2004 (dual) but psu (200w) seems to have a problem, sudden reboot with loaded multiple applications launching.
stop overclocking right now and get a new PSU!!!! That prescott overclocked is probably begging for 150+ watts..... What is your budget on a PSU and I'll find one for you..... If your not looking to spend too much I recommend the ......FSP 400pn....
http://www.newegg.com/Product/Produc...82E16817104953
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post #17 of 17
Thread Starter 
Big Typhoon CL-P0114 is awesome. It lowered load temp from 70 to under 50. And I bought used Aspire ATX-AS420W for psu.

Now I'm thinking to stay with 2.8/4.0. But board doesn't boot up with above 1.6v and 1.6v isn't stable yet. Currently ram timing is 2.5:3:3:5:4 with ddr320 setting (5:4).

What can I do now?
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