Stock HS/Fan Temps

F

ferrous

n00b
Joined
Jul 26, 2007
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I finally got around to assembling my new computer and started overclocking. I'm using the stock heatsink/fan that came with the e6550 and didn't even bother with changing the paste even though I had a tube of AS5. I'm new to overclocking so I'm not sure if I'm doing this right. My motherboard is the Gigabyte GA-P35-DS3R. In the BIOS I disabled C1E and then upped the FSB to 470 x 7 and set the RAM ratio to 2. This is the RAM http://www.newegg.com/Product/Product.aspx?Item=N82E16820145033
I wasn't sure about the other settings like voltages and advanced memory timings so I left them alone. Does this picture look ok so far? How do the temperatures look? Are they accurate?

 
Thats fine, temps are very good, susprising actually with stock HS and thermal pad.

I would run 8x mulitplier so you can get your FSB down in the just over 400 range and tighten the memory timings back up. Then see if you can go higher. No worries until you get around 65C under load.

Here is a guide to your bios settings.
http://www.hardforum.com/showthread.php?p=1030795318
 
BillParrish said:
I would run 8x mulitplier
Click to expand...

Unfortunately the largest multi on his E6550 is only 7x. It's the same multi as the E6300 has.

Your overclock looks good and your temps are good because you're not feeding the CPU excessive amounts of voltage. Your memory or motherboard will likely limit overclocking much further than ~3300 MHz.
 
If this E6550 is like my E6750, then I fear the tjunction is being misreported as 85C. I'm not a guru on this stuff, but read through it and understand this tjunction is used to calculate the temp that CoreTemp, TAT, and others report. And I think the real tjunction is probably 100C. This would mean the temps are reading 15C too low. And that really would explain a lot for me, like why I idle at sub-ambient temps. And why everyone thinks these new CPUs are so much cooler.

It's my theory that we need to add 15C to see the real temp on these new E6x50 CPUs.

This was exactly the same issue even when I got my E4300 and it was also misrepresented as tjunction 85C by CoreTemp 94. But CoreTemp 95 corrected something and it was then correctly recognized as tjunction 100C and finally started giving accurate readings.

So your 51C would really be 66C if all of this is true like I believe. That'd be a bit on the warm side, but not panic levels yet. I don't get concerned until 70C myself with these CPUs.
 
Ravynmagi: I compared my B2 E6400 which is assumed to have a maximum junction ( TjMax ) of 85C to a G0 E6550 which also has an assumed TjMax=85C and our reported temperatures at the same core voltage, room temperature and MHz were almost identical.

I don't believe any of the desktop dual core processors have a TjMax=100C. The only reason the programmer of CoreTemp came up with this was to try and correct for idle temperatures that are reported too low on the E4300. That's a sign that the on chip digital thermal sensors shouldn't be used for reporting idle temperatures. The DTS is designed for thermal throttle control as well as the thermal shut down of the processor when things get too hot.

The OP is running his processor at 1.264 volts which is below the default. That's why it's running so cool. I'm not a big fan of TAT so can you uncover CoreTemp 0.95 in your screen shot?
 
unclewebb said:
Unfortunately the largest multi on his E6550 is only 7x. It's the same multi as the E6300 has.

Your overclock looks good and your temps are good because you're not feeding the CPU excessive amounts of voltage. Your memory or motherboard will likely limit overclocking much further than ~3300 MHz.
Click to expand...

oops :eek: so many cpus so few brain cells.
 
Thanks for all the great advice, guys. BillParrish, that guide to the settings for my motherboard really helps a n00b like me a lot. :)

I think I will leave the speed where it's at for now, but I went ahead and ordered an Arctic Cooling Freezer 7 Pro to lower the temperatures. Your replies led to a few more questions though.

(G)MCH OverVoltage Control [+0.1V] <--- a little extra for stability
Click to expand...
Is that for the northbridge? If so, should I get some sort of cooling for it, and what are some options for what I should get? Speedfan shows "temp 2" hovering around 60 at stock voltage while running orthos and I'm guessing that's probably the northbridge. Is that getting too hot?

My current memory timings are 5-5-5-10 and it seems to be running fine, but I'm not sure what the ideal timings would be for this memory. I've read that these sticks can do 3-3-3-9 @ 667. http://www.pcper.com/article.php?aid=258&type=expert
I noticed that the manufacturer specs usually set the tRAS at 3 times the CL. Is that something that I should stick to?

DDR2 OverVoltage Control__ [+0.300V] <-- default is 1.8V, 1.8 + 0.3V = 2.1V set this to add up to your ram's voltage requirement.
Click to expand...
My RAM is supposed to run 1066 @ 2.2V but it booted fine without having to change anything. That's before I even started messing around in the BIOS. Does that mean that the board automatically adjusted the voltage to 2.2? The reason I'm asking is because I have no idea what the current voltage is set at since the BIOS only gives options for incremental voltage increases without ever saying what the actual voltage is.

And here's the a pic of CoreTemp


Again, thanks for all the help.

*EDIT
That pic is while idle.
Also, I have the CPU voltage set at "normal" which shows 1.3250V
 
unclewebb said:
Ravynmagi: I compared my B2 E6400 which is assumed to have a maximum junction ( TjMax ) of 85C to a G0 E6550 which also has an assumed TjMax=85C and our reported temperatures at the same core voltage, room temperature and MHz were almost identical.

I don't believe any of the desktop dual core processors have a TjMax=100C. The only reason the programmer of CoreTemp came up with this was to try and correct for idle temperatures that are reported too low on the E4300. That's a sign that the on chip digital thermal sensors shouldn't be used for reporting idle temperatures. The DTS is designed for thermal throttle control as well as the thermal shut down of the processor when things get too hot.

The OP is running his processor at 1.264 volts which is below the default. That's why it's running so cool. I'm not a big fan of TAT so can you uncover CoreTemp 0.95 in your screen shot?
Click to expand...

I'm still skeptical. But I'd love to believe you are correct and these temps are correct. It just seems a little too good to be true though.

PS. My E6750 at 3.52GHz and 1.45 volts is idling at 17C. My room temp is 25C.
 
The new G0 stepping is rated at 8W at idle compared to 22 Watts for the B3. This is resulting in lower idle temperatures which are impossible.

I don't think adding 15C to TjMax to correct this problem is the right thing to do. I think the real problem is that idle temperatures which are based on the digital thermal sensors are not accurate at low temps but very accurate when the core temperature is at 50C or above. Adding 15C to TjMax might cure the idle temps but will screw up the load temps.

I've calibrated my E6400 with the heatsink off using an IR thermometer and I'm pretty sure my core temps under load using an assumed TjMax=85C are accurate but my idle temps can go below my ambient temperatures which obviously isn't right.

How about run Orthos on your E6750 and report your actual core voltage, your room temperature, what cooler you're using, what CoreTemp 0.95 reports and any other relevant information so we can compare load temperatures.
 
Motherboards do not automatically adjust voltage for memory. If your memory is rated at 2.2 volts then you need to set your board to +0.4. Default is 1.8 volts.

Performance wise there is no difference between CL5-5-5-15 and CL5-5-5-10 so set it to wherever it runs reliably. You might also want to try CL4-4-4-12. With 2.2 volts you should be able to run CL4 at somewhere between DDR2-900 and DDR2-1000.
 
unclewebb said:
How about run Orthos on your E6750 and report your actual core voltage, your room temperature, what cooler you're using, what CoreTemp 0.95 reports and any other relevant information so we can compare load temperatures.
Click to expand...

e6750-at-3520b.png


The voltage in the BIOS is 1.450. The temp is 47C. That load temp even seems low to me considering how much I'm overclocked and that I'm using a Coolermaster Hyper TX, a nice little cooler, but it shouldn't be that impressive.

PS. Sorry, my ambient temp is still 25C.
 
Here are my results with a revision B2 E6400 at a room temperature of 25C, 3520 MHz, 1.400 volts. I'm using a Tuniq Tower.

test3520yu4.png


I wish I could have gone longer than 5 minutes but my revision B2 is no match for your G0 processor at that voltage level. My temperatures were moving around from about 47C to 53C. If you select small FFTs in Orthos you tend to get more consistent temperatures.

The only way we could create a fairer comparison is go small FFTs and then you would have to either increase your voltage or reduce your overclock so my B2 can last for more than 5 minutes of Orthos testing.

You can't really draw too many conclusions on this short of a test but our load temperatures don't seem too different. If you consider all the variables I think they look pretty comparable when TjMax is assumed to be 85C for both of our processors.
 
I also do small FFT tests as well just like you said to see how my load temps really look like.

Here is the screenshot from my 3.6GHz OC.

e6750-at-3600.png


The voltage in CPU-Z reads 1.408 and this was 1.475 in the BIOS. The temp in CoreTemp reads 55C (which I feared to really mean 70C). I also needed to add a bit more voltage to get this stable for more than a couple hours, but I didn't bother because of my temp concerns at this point.


PS. You also have a much better HSF than I do. Though I just ordered the TuniqTower from NewEgg (on sale for $45 plus free shipping) and it will be here tomorrow. So I'll be eager to see how much this improves my temps.

And PPS. Thanks for your help. And I really hope you are right and I'm wrong. It's just my luck usually isn't this good. So I worry. :)
 
I can run Orthos at 3600 MHz but I need 1.480 volts to do it as reported by Everest or SpeedFan. If you want to compare then you're going to have to come down to my level because my B2 doesn't have the balls to keep up with a G0. :(

What CoreTemp 0.95 tells you is that your processor is 30C ( 85C - 55C ) away from the throttling point. As long as you are running stable you have nothing to worry about. You have lots of head room and should be able to overclock some more without any problems. It doesn't matter what TjMax or what your absolute temperature really is as long as you have some head room and you're Orthos stable.

BigBruin dropped their load temps about 5C with a Tuniq on high speed compared to your present cooler. Your results will be interesting.
 
My 4300 sucks compared to some of those temps. Maybe its my case.

2 L2 I believe, at 2.7GHz, will hit 60'C on the CPU, 57'C on the cores.

Here's the thing at 2.4
Stressing2.4.jpg

Bleh. Might be my AS5, but I don't think I can screw up that badly.
 
unclewebb said:
I can run Orthos at 3600 MHz but I need 1.480 volts to do it as reported by Everest or SpeedFan. If you want to compare then you're going to have to come down to my level because my B2 doesn't have the balls to keep up with a G0. :(

What CoreTemp 0.95 tells you is that your processor is 30C ( 85C - 55C ) away from the throttling point. As long as you are running stable you have nothing to worry about. You have lots of head room and should be able to overclock some more without any problems. It doesn't matter what TjMax or what your absolute temperature really is as long as you have some head room and you're Orthos stable.

BigBruin dropped their load temps about 5C with a Tuniq on high speed compared to your present cooler. Your results will be interesting.
Click to expand...

Your insight in this thread is wonderful. Thank you very much for it. I am in the same boat, with my e6750 and temperatures. With a Tuniq Tower at 3.2 ghz (400 x 8) at 1.35V, coretemp reports the cores idling ~18C (with a tjunc of 85). Under orthos, it can get up to almost 50C under certain tests! I was worried at first, but you are starting to assuage my fears :D I do want to try re-mounting the Tuniq and tightening the screws as tight as humanly possible, but I guess I don't feel so bad right now. One thing to note is, after I do something CPU-intensive, the temps return to an idle temp of ~24, instead of the ~18 they were pre-CPU calculations. Is this the sign of a poorly mounted heatsink, or is this normal? I haven't ever payed this much attention to temperatures of my computer components ever. Once again, thanks for all your help and insight
 
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