E6750 Retail - Some results Air Cooled

[rob[GL]]

Was originally to use Scythe Ninja Rev. 2 but was toooooooooo damn big for my system... Even with the Zalman cooler instead of Scythe, I don't think CPU temps will be the problem... This board seems to have large Vdroop, and chipset gets hot, added extra cooling, will see how I high I can get!

[3oh6]

If your bedroom is 25celcius, and you pickup say a metal screwdriver, it will be colder than ambient... Where maybe a spindle of cd's or a stack of paper will be the same warm as the rest of the room.

no, the screwdriver is not colder than anything else in the room...nothing can be colder than ambient temperature unless said object is in direct contact with a colder object. this is not my opinion, this is Physics. heat only flows from hotter objects to colder objects...do some research on this, heat cannot be removed from a colder object to a hotter one, the laws of physics on this planet do not allow it. heat only flows one way.

the screwdriver (or anything else metal for that matter) only feels 'colder' than paper or CDs because metal transfers heat better than paper or CDs and therefore draws heat from your skin faster than paper or CDs.

remember heat only flows from hotter objects to colder objects. us, being human and all, maintain a body temp of about 98F where room temperature tends to be closer to 70~75F thus making us warmer than ambient and all objects in the room. because we are warmer than ambient, heat flows from us to everything we touch in the room. this is why metal items feel colder when we touch them. when you touch an item, you lose heat to that object and there is less heat in your fingertip at contact making it feel 'colder' because we lose that heat to the object. metal transfers heat quite rapidly as opposed to paper which doesn't. therefore the metal object 'feels' colder only because it is removing heat from our fingertips faster.

yes, a screwdriver that was just brought into a room from another room (or fridge or the like) where the ambient air is colder will have a lower temperature initially but after a short period of time (depending of course on the temperature difference of the two rooms) the screwdriver will gain heat from the ambient air and become the same temperature. the screwdriver cannot hold the lower temperature from the other room without help. the screwdriver gains heat from the ambient temperature until they become equal and then doesn't get any hotter because it is the same temperature as ambient and heat only flows from hotter objects to colder objects.

this is why everything in the room is the same temperature as ambient...eventually.

if you put an ice cube in a room, it will gain heat from the ambient temperature causing it to melt into water. that water continues to gain heat from the ambient temperature until it becomes the same temperature as the ambient air. from that point on, the water will never lose heat nor gain heat and drop below ambient temperature or raise above ambient temperature because heat only flows from hotter objects to colder objects. you can't set an ice cube on a table in a room with an ambient temperature of 70F and not have the ice cube melt, can you?

just like the screwdriver can't be colder than ambient and neither can your processor, unless it is in direct contact with an object of a colder temperature that will remove heat from your processor. your heatsink can never be colder than ambient because the only thing it is in contact with is the ambient air and therefore cannot become a lower temperature than the ambient air because heat only flows from hotter objects to colder objects. does this make sense?

if your ambient temperature is 25C...the 'coldest' your processor can get is 25C regardless of what a thermal temp gun or TAT or CoreTemp say. Physics says 25C...period. with the heat a processor is generating even at idle at 1.00v with the frequency lower from a dropped multi, it takes a lot of heat removal ability to maintain it at ambient...just ask the water cooling guys in here.

as far as i know, there is no air cooler on the market that has the ability to remove and dissipate heat fast enough to keep a running C2D at ambient temps regardless of voltage or frequency. because of the relatively weak abilities of air coolers to remove heat when compared to a high-end water setup, chances are you are at least idling a few degrees above ambient temp if not 5C~10C regardless of what your processor and voltage drop down to.

i didn't mean for this post to be so bloody long or sound condescending in anyway, but it was clear that some readers in this thread didn't understand how temperature and heat transfer worked. i only posted this to help educate those readers better on this subject...please don't throw a fit and argue this further...just read and learn from it. ask questions if you have to and myself or others will be happy to answer but i think my explanation and examples should be more than enough.

[rob[GL]]

Maybe my room is colder than the digital readout on my A/C unit? Maybe the temperature probe is off by a couple degress at idle?

Irregardless, 35c @ full orthos load after 6 hours is impressive on air cooling...

[scwam]

no, the screwdriver is not colder than anything else in the room...nothing can be colder than ambient temperature unless said object is in direct contact with a colder object. this is not my opinion, this is Physics. heat only flows from hotter objects to colder objects...do some research on this, heat cannot be removed from a colder object to a hotter one, the laws of physics on this planet do not allow it. heat only flows one way.

the screwdriver (or anything else metal for that matter) only feels 'colder' than paper or CDs because metal transfers heat better than paper or CDs and therefore draws heat from your skin faster than paper or CDs.

remember heat only flows from hotter objects to colder objects. us, being human and all, maintain a body temp of about 98F where room temperature tends to be closer to 70~75F thus making us warmer than ambient and all objects in the room. because we are warmer than ambient, heat flows from us to everything we touch in the room. this is why metal items feel colder when we touch them. when you touch an item, you lose heat to that object and there is less heat in your fingertip at contact making it feel 'colder' because we lose that heat to the object. metal transfers heat quite rapidly as opposed to paper which doesn't. therefore the metal object 'feels' colder only because it is removing heat from our fingertips faster.

yes, a screwdriver that was just brought into a room from another room (or fridge or the like) where the ambient air is colder will have a lower temperature initially but after a short period of time (depending of course on the temperature difference of the two rooms) the screwdriver will gain heat from the ambient air and become the same temperature. the screwdriver cannot hold the lower temperature from the other room without help. the screwdriver gains heat from the ambient temperature until they become equal and then doesn't get any hotter because it is the same temperature as ambient and heat only flows from hotter objects to colder objects.

this is why everything in the room is the same temperature as ambient...eventually.

if you put an ice cube in a room, it will gain heat from the ambient temperature causing it to melt into water. that water continues to gain heat from the ambient temperature until it becomes the same temperature as the ambient air. from that point on, the water will never lose heat nor gain heat and drop below ambient temperature or raise above ambient temperature because heat only flows from hotter objects to colder objects. you can't set an ice cube on a table in a room with an ambient temperature of 70F and not have the ice cube melt, can you?

just like the screwdriver can't be colder than ambient and neither can your processor, unless it is in direct contact with an object of a colder temperature that will remove heat from your processor. your heatsink can never be colder than ambient because the only thing it is in contact with is the ambient air and therefore cannot become a lower temperature than the ambient air because heat only flows from hotter objects to colder objects. does this make sense?

if your ambient temperature is 25C...the 'coldest' your processor can get is 25C regardless of what a thermal temp gun or TAT or CoreTemp say. Physics says 25C...period. with the heat a processor is generating even at idle at 1.00v with the frequency lower from a dropped multi, it takes a lot of heat removal ability to maintain it at ambient...just ask the water cooling guys in here.

as far as i know, there is no air cooler on the market that has the ability to remove and dissipate heat fast enough to keep a running C2D at ambient temps regardless of voltage or frequency. because of the relatively weak abilities of air coolers to remove heat when compared to a high-end water setup, chances are you are at least idling a few degrees above ambient temp if not 5C~10C regardless of what your processor and voltage drop down to.

i didn't mean for this post to be so bloody long or sound condescending in anyway, but it was clear that some readers in this thread didn't understand how temperature and heat transfer worked. i only posted this to help educate those readers better on this subject...please don't throw a fit and argue this further...just read and learn from it. ask questions if you have to and myself or others will be happy to answer but i think my explanation and examples should be more than enough.

I want to know why a probe thermometer at ambient 28c dipped into methanol at ambient 28c, when removed immdediate drops down 10c. Could you answer this for me? Makes no sense because there is nothing in the room that is colder than 28c. BTW, the thermistor is extremely accurate (0.2c at most) and is encased in a stanless steel probe

[MacClipper]

heheh, seems too low temps can also drive people up the wall.

Back to thermodynamics. Methanol absorbs thermal energy from the thermometer as it evaporates into the 28C air, thus cooling the thermometer.

[LagunaX]

Umm....so what is the preliminary consensus for the maximum dual orthos blend stable air overclock for this chip? 3.7ghz? 3.8ghz?

[alpha0ne]

My e6750 was delivered this morning so I'll install in a few mins and get back with some news re temps and max OC @ default Vcore

SLA9V Malay
L719A823
Max 1.35Vcore
Pack Date 06/26/07

[alpha0ne]

Looks like I must have a really crap e6750

400FSB x 8 = 3.20GHz ORTHOS bombs out after ~ 5 minutes large FFT also small FFT using default Vcore of 1.350V, using Abit IP35 Pro thats the min you can select in bios with these new cores

Upped Vcore to 1.36V and STILL bombs out but when set @ 1.370Vcore is torture stable after 15 minutes with uGuru reporting 1.33Vcore @ 39C

I also tried x6 multi x 480FSB and boots OK but 490FSB no boot so seems that there really is an FSB wall


Much more to come

[MacClipper]

400FSB 1.325V BIOS, RAM 2.0V, all else at AUTO

[Start]

Looks like I must have a really crap e6750

400FSB x 8 = 3.20GHz ORTHOS bombs out after ~ 5 minutes large FFT also small FFT using default Vcore of 1.350V, using Abit IP35 Pro thats the min you can select in bios with these new cores

Upped Vcore to 1.36V and STILL bombs out but when set @ 1.370Vcore is torture stable after 15 minutes with uGuru reporting 1.33Vcore @ 39C

I also tried x6 multi x 480FSB and boots OK but 490FSB no boot so seems that there really is an FSB wall


Much more to come

That sucks

[Gautam]

I want to know why a probe thermometer at ambient 28c dipped into methanol at ambient 28c, when removed immdediate drops down 10c. Could you answer this for me? Makes no sense because there is nothing in the room that is colder than 28c. BTW, the thermistor is extremely accurate (0.2c at most) and is encased in a stanless steel probe

Because the methanol is evaporating off of the probe tip. Evaporation is an active form of heat removal (as opposed to passive, e.g. air cooling or water) and can give you below ambient temperatures. That's why you feel cold when you step out of the shower.

[Durzel]

my BIOS hardware monitor temp shows cpu at 26c
ctemp shows 15c...so maybe 10-15c difference between ctemp and actual...

Is that with Speedstep or whatever enabled though?

I can't believe that a CPU runs only 4 degrees higher than ambient temperature at its regular clock speed, and as has already been remarked running lower than ambient defies the laws of physics.

[rob[GL]]

Just came home from work... Orthos has been running 26.5 hours now... Temperatures have leveled out even more...

[MacClipper]

Tried OCCT again after not touching it for many years and it seems more punishing than Orthos - had to up Vcore back to 1.45V BIOS to pass.

[rob[GL]]

So you set 1.45v in bios, and got 1.41v in Windows, maybe it's more cpu-related than board related?

[michaLcoughliN]

try 450 fsb
1.4vcore
and loosen timings to 5:5:5:15

[dinos22]

Looks like I must have a really crap e6750

400FSB x 8 = 3.20GHz ORTHOS bombs out after ~ 5 minutes large FFT also small FFT using default Vcore of 1.350V, using Abit IP35 Pro thats the min you can select in bios with these new cores

Upped Vcore to 1.36V and STILL bombs out but when set @ 1.370Vcore is torture stable after 15 minutes with uGuru reporting 1.33Vcore @ 39C

I also tried x6 multi x 480FSB and boots OK but 490FSB no boot so seems that there really is an FSB wall


Much more to come

it's not the CPU
it's the motherboard
i had the same thing happen to me until i used Load Failsafe values in bios and enabled other devices manually

i had errors at stock as well until i did that
i am suspecting some kind of incompatibility with my Dominators donno but after that the CPU was stable at normal settings

[alpha0ne]

Yes I think your partly right dinos

Thats exactly what I did plus cleared CMOS and after the reboot I found the available Vcore settings had changed from what was available using my e6300 that was doing 3.250GHz default Vcore which was 1.325V set in bios (the lowest setting available)

I have not tested extensively enough to confirm but I think the bios is not accurate when changing Vcore with small increases showing absolutely no differences between 1.35V to ~ 1.4Vcore

Currently @ 3.50GHz with 1.50Vcore set in bios but showing between 1.46 to 1.48 in uGuru idle and as low as 1.42V under load

Oh and for some reason the IP35 Pro uGuru app is not captured in the screenshot using irfanview ?????

[dinos22]

i didn't have problems capturing mine

i absolutely LOVED the fact you can change voltage real time

That's amazing

[scwam]

how far can you get the fsb on that ip35 board?

[rob[GL]]

I am still testing my board... Seems depending on which vcore in bios, droop can be minimal or huge... I'm priming now 433FSB @ 1.360v

Funny that 400FSB @ 1.300v was sooo stable, yet to reach 433 I needed an increase of 0.06v - and I don't even know if it's stable yet... will find out when I get home from work...

[alpha0ne]

Currently @ 3.60GHz with 1.55Vcore set in bios, a bit too much Vdroop for my liking, I stopped buying Anus because of Vdroop

[rob[GL]]

Vdroop seems pretty nasty on these P35 boards?

[LagunaX]

Seems like a good e6600 might be better then, 3.6ghz at lower vcore, as far as the retail e6750's. The ES seemed promising though.

[MacClipper]

E6750 at 500FSB x 7, just 2 sticks of RAM, the few extra bucks for the E6750 buy multiplier flexibility. btw, the Commando still allows EIST to drop to 6x despite the EIST option disappearing in the BIOS when Multiplier Control is activated.


Got a fellow forummer apparently with the same E6750 batch running his at >4GHz on water and 1.6V Vcore on P35-DQ6 (imo, strictly a no droop mobo). Guess it's benchable for his but not 24/7 practical at such high Vcore.