Intel Pentium D 930 3.0GHz @ 4.0GHz...

[Roy Andrews]

Prime95 is going on it's 8th hour right now running two instances. I ran the small in place FFT test on the first core and the blend test on the second core. I'm using stock cooling on an Asus P5LD2. 1024MB of Corsair PC5400 running at 667MHz (4-4-4-12). At 100% full load on each core, this CPU is running along at a warm 75 degrees Celcius, but it's the middle of July and I don't have air conditioning. Links for CPU-Z reports below.

What kind of results have other people been getting with their Pentium D CPUs?

http://www.geocities.com/big_99/cpuz.htm

http://www.geocities.com/big_99/cpuz.jpg

 

[Furen]

Have you tried running throttlewatch? 75 C seems a tad high and running at 4GHz wont help if your CPU is skipping every other clock. I've seen Prescotts hit very high clocks on mediocre cooling before, but the throttling makes them perform worse than stock.

 

[stevty2889]

Yep, 75c is definatly throttling. At stock speeds throttling kicks in around 72c. With increased Vcore, the throttling kicks in at a lower temp. Doesn't do any good to OC to 4ghz if you are throttling, because you will perform lower than stock. My 920's were hitting around 53-55c on water at 3.7ghz, and stayed around 62c on stock cooling at 3.6ghz.

 

[theteamaqua]

yes ur temp is awefully high .. bigtyphoon 920 @ 3.78GHz dual rpime 3 hours 64c

http://img407.imageshack.us/img407/8273/165pj.jpg

i can oc to 4.004Ghz but its not dual prime stable anymore.. i can satill play games , benchies

 

[FelixDeCat]

:thumbsup::shocked:

 

[Roy Andrews]

So how much throttling is allowed in order for me to reap the benefits of a 1000GHz overclock? ThrottleWatch reported 11% spikes every thirty seconds or so while two instances of Prime95 were running on my chip at 4GHz. Is there a way to disable CPU throttling? Is it safe to do so?

 

[Roy Andrews]

Originally posted by: theteamaqua
yes ur temp is awefully high .. bigtyphoon 920 @ 3.78GHz dual rpime 3 hours 64c

http://img407.imageshack.us/img407/8273/165pj.jpg

i can oc to 4.004Ghz but its not dual prime stable anymore.. i can satill play games , benchies

What board and heatsink/fan are you using? The temperature I was reporting was at the same voltage as you, 1.4V, but you seem to be getting about 10 degrees lower.

 

[theprodigalrebel]

Originally posted by: Roy Andrews

Originally posted by: theteamaqua
yes ur temp is awefully high .. bigtyphoon 920 @ 3.78GHz dual rpime 3 hours 64c

http://img407.imageshack.us/img407/8273/165pj.jpg

i can oc to 4.004Ghz but its not dual prime stable anymore.. i can satill play games , benchies

What board and heatsink/fan are you using? The temperature I was reporting was at the same voltage as you, 1.4V, but you seem to be getting about 10 degrees lower.

He's using this: Thermaltake Big Typhoon

 

[Markfw]

Throttlewatch doesn;t work on the 9xx series I don't think. Stevty and I had to use S&M. What is your vcore at ?

 

[Roy Andrews]

So I found out that I can disable throttling in my P5LD2. I did disable it and dropped the VCORE down to 1.35V from 1.4V and now temperatures at full load are stable at 72 degrees C. Still warm, I know, but the CPU isn't throttling anymore.

Oh yeah, and stable for two hours so far at the reduced VCORE.

 

[stevty2889]

Originally posted by: Roy Andrews
So I found out that I can disable throttling in my P5LD2. I did disable it and dropped the VCORE down to 1.35V from 1.4V and now temperatures at full load are stable at 72 degrees C. Still warm, I know, but the CPU isn't throttling anymore.

Oh yeah, and stable for two hours so far at the reduced VCORE.

You can only disable TM2 throttling, you can not disable TM1 throttling, it's built in the the CPU. 72c is still too much with the raised vcore.

 

[Roy Andrews]

OK... so I put the FSB down to 250MHz and the VCORE to default. I just finished running Prime95, two instances, for six hours with no errors and no warnings and ThrottleWatch reported no throttling even with it enabled in the BIOS.

So I guess until I get a heatsink/fan that's better than stock, I'm going to stick with my 25% overclock at stock voltage, with stock cooling.