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EVGA 750i FTW Overclock Thread - Page 243

post #2421 of 2885
Everest does show typical and max draw amps under motherboard -> CPU. For Q6600 the claimed Core is 1.325, typical power 130 watt @ 1.325 = 98.11Amp, max draw is 168.8 watt @ 1.325v = 127Amp. I find that a little high since TDP is 95 watt (which I would concider typical).

http://download.intel.com/design/pro...s/31559205.pdf

page 18 says max amp to processor is 115Amp. They got on to say this must be mneasures at same points voltage regulation feedback circuits talk on. This may mean that is the max before regulators stop giving more or some other action.

115Amp @ 1.5v = 172.5 watt which seems very close to other things I have been reading.
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post #2422 of 2885
Quote:
Originally Posted by blkrnbw View Post

Now from Toms I think I found something quite nice. OC test setup with volt and watt listed so for 4259Mhz used 1.474v required 200watt power = 135 Amp, 3601.5Mhz 1.272v required 142 watt = 111 Amp and just for a nice graphable curve 3900.5Mhz 1.416v 158 watt = 111 Amp, actually that screws up the curve doesnt it, same draw, ok so 3300Mhz 1.296v 134 watt = 103 Amp. If I find some more reading will fire them off. As they are pretty specific about the power I beleive this is CPU only.

Brian

Nice! Did they happen to list temperatures for those reading. I'm going to need to know the temps plus get all the same data with stock and ~71C.



So Icc in Intel's data sheet is referring to amps?
    
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post #2423 of 2885
Working on a couple other things to verify the 100Amp max draw, but I am almost positive now. And if ya wanna see something REAL SEXY check out the screenshot of server at work I just uploaded. 16 freaking cores in task manager. Dual Quad Core e5520's 16GB RAM, 2 X 73GB 15RPM SAS drives. Opening it up was different looking. I'm used to processors being together and all RAM banks together. this was more like processor hrm how to explain, take 4 sticky notes 2 mark CPU, 2 mark RAM, make a squae and diagonal are CPUs. Something still was not right. I see south bridge, RAID card...... Oh yeah I7. If I had time before it was being used in production would have dropped XP on it, loaded PC and 3Dmark, threw in a vid card and see what it can do overall. Stock vid is like 16MB with VGA port only (what more do ya need for server?). But it is quick. You see 2003 splash screen for about 1 sec then flash and on logon screen. Wish I had one for home ;-).

Brian

http://www.overclock.net/gallery/sho...hp/photo/23297
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post #2424 of 2885
Quote:
Originally Posted by PizzaMan View Post
Nice! Did they happen to list temperatures for those reading. I'm going to need to know the temps plus get all the same data with stock and ~71C.

They did not mention temps, although that is a variable that cannot be reproduced relaiably, thermal compund, type of sink, tightness of screw etc can not be replicated. We can take the fixed knowns (voltage, watts, etc) and doing the math get known numbers for Amps etc. It does look like 100Amp is what the boards will let in.

So Icc in Intel's data sheet is referring to amps?
I do believe Icc is Amp. It seems there is also some dynamic feedback between processor and board to ensure the amps dont go above that level.

I had a thought earlier also, I have a "kill-a-watt" between PC and wall. Little box that you plug into wall then equipment into that. Give Amp draw, watts and a couple other things. Amps will be different since it is converted from AC to DC and splitup amonsst the rails. But watts may be the same on both sides. I know when I OC's I was drawing almost 100watts above typical levels. This is across everything, but I am pretty sure I can isolate increase in draw from various peices of hardware which means simple math after readings. With 6 HD's, 4 RAM sticks, 4 fans and water pump drawing like 308watt, jumps t0 354 with prime running mixed tests. I cannot see anything else increasing draw except for board devices (RAM, CPU, chipset) and that number seems about right. I will have to work on this a bit more this weekend I suppose. Or are you ahppy with the 100Amp max we were looking for.
And maybe I should hit up some other threads also ;-)
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post #2425 of 2885
Quote:
Originally Posted by blkrnbw View Post
I do believe Icc is Amp. It seems there is also some dynamic feedback between processor and board to ensure the amps dont go above that level.

I had a thought earlier also, I have a "kill-a-watt" between PC and wall. Little box that you plug into wall then equipment into that. Give Amp draw, watts and a couple other things. Amps will be different since it is converted from AC to DC and splitup amonsst the rails. But watts may be the same on both sides. I know when I OC's I was drawing almost 100watts above typical levels. This is across everything, but I am pretty sure I can isolate increase in draw from various peices of hardware which means simple math after readings. With 6 HD's, 4 RAM sticks, 4 fans and water pump drawing like 308watt, jumps t0 354 with prime running mixed tests. I cannot see anything else increasing draw except for board devices (RAM, CPU, chipset) and that number seems about right. I will have to work on this a bit more this weekend I suppose. Or are you ahppy with the 100Amp max we were looking for.
And maybe I should hit up some other threads also ;-)
Well, I don't think it's going to be accurate. First the change between AC and DC. Plus the fact that the amps are redefined by the board before they reach the CPU.

OK, here's a little more about my theory. Each run to test max watts usage has to be done with max OC that is limited by temps. My theory is that a CPU on stock volts that have been OC'd as much as possible with stock volts and is reaching farely high tempsprbly using stock cooler to. The max OC considering temps and volts will result in roughly the same amount of watts be used vs a CPU that is overvolted to it's max considering limited by temps with better cooling will use roughly the same watts as the test with the stock volts run. Those proving that the chip has a power consumption limit.

hope that makes since...

I wish everest or some other monitoring program could show watts or amp being used from the CPU.

maybe we should start another thread to continue this discussion.
Edited by PizzaMan - 8/13/09 at 8:38pm
    
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post #2426 of 2885
I think the theory is off. When I was OC'ing there was a rather large increase in power (watts) from wall. Watts are watts. no conversion from AC to DC. The conversion is from AC to DC, 115 watt 2-3 Amp is split up throughout the rails. But from what I understand the volt and amps get split up but watt in is watt out.

The problem with above theory is only limiting factor (other than BIOS) is Amps
so if Amp hits 100 and stays at that point stock v for Q6600 at 100 Amp would be 78.57 watt.
increasing volt to 1.5 * 100 = 150 watt

the problem with throwing a thermal dynamic in there is too many variables, ambient air temp, thermal compunds used, aftermarket cooling, whether i have ice in my coling tower etc.
There are still limits regardless of how well it is cooled. That run Toms did was running 180+ watt, yet the die was -163. Amps are regulated because (and this is only an I think) over amp is going to arc and jump across paths at some point.
Edited by blkrnbw - 8/14/09 at 12:11am
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post #2427 of 2885
I feel kinda bad for hijacking this post, but I'd feel worse creating another one having this two down.

It's about a new 750 that came from RMA the past Tuesday. I was mounting it, noticed the ,62v Vdroop and went ahead to do the pencilmod. But till now, I didn't achieved anything. I'm sure I'm shading the correct resistor, using a Staedler HB2, the common pencil, lol. The vdroop is still being exactly the same.

What does this mean? Am I doin it wrong or there are some mobos where the Pencilmod it's not possible?
post #2428 of 2885
Quote:
Originally Posted by Eastrider View Post
I feel kinda bad for hijacking this post, but I'd feel worse creating another one having this two down.

It's about a new 750 that came from RMA the past Tuesday. I was mounting it, noticed the ,62v Vdroop and went ahead to do the pencilmod. But till now, I didn't achieved anything. I'm sure I'm shading the correct resistor, using a Staedler HB2, the common pencil, lol. The vdroop is still being exactly the same.

What does this mean? Am I doin it wrong or there are some mobos where the Pencilmod it's not possible?
You just need to keep shading. Also, you can shade on both the resistors the arrow is pointing at. They both have the same function.
    
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post #2429 of 2885
Ok, so im going through the massive amounts of stability tests and it passed small ffts and passed Large ffts with the exception of worker 1 (im pissed about that). Anyways, I wanted to know what nVidia enthusiast platform KDM does... it showed up in my hardware as not working and i uninstalled the driver and it doesnt show up in the hardware list anymore... I dont notice any problems with anything but its bugging me because i searched everywhere and i cant find the answer...

Another thing is worker 1 took 11hours and 37 minutes to fail... The others were going on 18 hours without any errors (only reason i didnt stop it was because i was running the test while i slept). Voltages were:
Vcore- 1.3v (gives me 1.28v. Bumped it up to 1.30625v so it is around 1.285v and it gives 1.256v under load not sure if that is ok or not but it hasnt failed large ffts yet so i guess it is right now)
FSB- 1.2v (Probably have to play with gtlvrefs in order for this to work. bumped it up to 1.3 for now)
RAM- 1.825v (Its my low voltage Tridents FTW. Bumped it up 1.85v)
SPP- 1.5v (i just bumped this up to 1.55v and im trying again)
nF200- Auto
post #2430 of 2885
Quote:
Originally Posted by PizzaMan View Post
You just need to keep shading. Also, you can shade on both the resistors the arrow is pointing at. They both have the same function.
Solved. Used another pencil (A mechanical one) and worked perfectly at the first attemp. I think it was the wrong kind of pencil
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