High Temperatures 3930K

[ragedev]

Hi,

I have an i7-3930K running at 4.7GHz at 1.4V. My idle temperatures are around 40-45C and load temps go to around 75-80C on the hottest core. I am running an XSPC RayStorm CPU block with a XSPC 750 Resovoir/Pump and 240mm Radiator.

I have two fans cooling the radiator, one is a 120mm Corsair AF120 Quiet Edition and the other is a stock fan that came with the water cooling kit (120mm).

Would replacing the radiator fans with two SP120s improve temperatures and if so, how much by? Or is the temperatures normal for this voltage?

[Paralectic]

Maybe it's overclocked too much.?

[Bluethulhu]

You should replace both fans with something like Scythe GTs if you care about noise, plus they will cool better than your current fan setup. I get high temps on my 3930k as well, it's a really toasty CPU.

[FlakeyBanana]

those volts are pretty high, remember the higher your voltage the hotter it will get

[Lord Pantaloons]

1: Too much voltage, 1.4 will degrade your CPU really fast.

2: AF120's aren't meant for rads, they are case fans. If you want to use Corsair fans on rads you are supposed to get SP120's.

[SeanAngelo]

get SP120's for static pressure, AF fans are optimized more for airflow.

[ragedev]

1: Too much voltage, 1.4 will degrade your CPU really fast.

2: AF120's aren't meant for rads, they are case fans. If you want to use Corsair fans on rads you are supposed to get SP120's.

I know I'm meant to use SPs but I had no other use for the extra AF fan. In regards to voltage, I'm fine with 1.4V as I have Intel's Performance Tuning Protection Plan.

How much of a temperature difference will I see if I switch fans?

[Leonard]

Hi,

I have an i7-3930K running at 4.7GHz at 1.4V. My idle temperatures are around 40-45C and load temps go to around 75-80C on the hottest core. I am running an XSPC RayStorm CPU block with a XSPC 750 Resovoir/Pump and 240mm Radiator.

I have two fans cooling the radiator, one is a 120mm Corsair AF120 Quiet Edition and the other is a stock fan that came with the water cooling kit (120mm).

Would replacing the radiator fans with two SP120s improve temperatures and if so, how much by? Or is the temperatures normal for this voltage?

Firstly, 1.4v is a lot for any cooler except LN2. Have you tried offset voltage? It may help with your temperatures. The pump/res is ok but not the best of strength, i have one too and i am changing it as i will be adding some more water blocks to my build. Changing the fans with the Sp120s won't help much. Maybe at full speed the SP120s may reduce the temperatures by 2C. Adding another radiators would help but the pump may not be able to handle the other radiator and for this reason i am changing my XSPC 750 pump/res combo.

[BrightCandle]

By any chance can you measure the temperature of your water after the system has been running with full load for at least 10 minutes?

 

You haven't said what Radiator you have but based on the other parts of your kit I am guessing its probably of the thin variety rather than thick. There is a possibility that the water temperature is well above the 10C delta you ideally shoot for as the fan speed is relatively low, the fans don't have good static pressure and the radiator is of the thin and low FPI type and designed for high speed fans. Knowing the exact model of the radiators would help predict this but just probing the water temperature with something will tell you if that is likely the issue.

 

1.4 V and 4.7 Ghz is also extremely high for this CPU, Intels maximum stated voltage is 1.35V and most people don't get above 4.4Ghz with that. So your chip has overclocked exceptionally well along with a lot of voltage and you get the power consumption problems to go with it. You are well into the 250W range of power consumption. The best thin radiators are good for about 90W of dissipation per 120mm at 10C water delta above ambient on 800 rpm fans. You appear to be using 1100rpm fans which are about 15% better than 800rpm, but that still makes it only 103.5 W per slot and so you temperature is going to be more like 12 degrees or so at best. But I suggest you measure it rather than me trying to estimate it as I could be miles off and it needs to be eliminated as an issue.

 

Most likely its just voltage + clock speed driving it up and your water loop is a little underspec for the voltage you are pushing through it making things a little worse. There are definitely better CPU blocks out there that might translate into 5C at best but its just the limitations of cooling with ambient temperature.

[Faa]

#1 Firstly, 1.4v is a lot for any cooler except LN2. #2 Have you tried offset voltage? It may help with your temperatures. #3The pump/res is ok but not the best of strength, i have one too and i am changing it as i will be adding some more water blocks to my build. #4 Changing the fans with the Sp120s won't help much. Maybe at full speed the SP120s may reduce the temperatures by 2C. #4 Adding another radiators would help but the pump may not be able to handle the other radiator and for this reason i am changing my XSPC 750 pump/res combo.

 

#1 I can use 1.4V on a h100i and just for real world situations a nh-u12s heatsink >.< You dont need LN2

#2 Offset voltage isnt going to help your temps except idle temps if speedstep is enabled/power plan on balanced

#3 The pump is more than enough, that flowrate is sufficient for multiple waterblocks and rads.

#4 AF120's are barely moving air half of that air is lost. The question is what rad he uses, if its an RS240 then its obvious because theyre optimized for highspeed rads.

 

1.4 V and 4.7 Ghz is also extremely high for this CPU, Intels maximum stated voltage is 1.35V and most people don't get above 4.4Ghz with that. So your chip has overclocked exceptionally well along with a lot of voltage and you get the power consumption problems to go with it. You are well into the 250W range of power consumption. The best thin radiators are good for about 90W of dissipation per 120mm at 10C water delta above ambient on 800 rpm fans. You appear to be using 1100rpm fans which are about 15% better than 800rpm, but that still makes it only 103.5 W per slot and so you temperature is going to be more like 12 degrees or so at best. But I suggest you measure it rather than me trying to estimate it as I could be miles off and it needs to be eliminated as an issue.

1.4V & 4.7GHz is nothing, perfectly to do with nh-d14's. The maximum voltage isnt 1.35V for this cpu. Its 1.45V

[airdeano]

Hi,

I have an i7-3930K running at 4.7GHz at 1.4V. My idle temperatures are around 40-45C and load temps go to around 75-80C on the hottest core. I am running an XSPC RayStorm CPU block with a XSPC 750 Resovoir/Pump and 240mm Radiator.

I have two fans cooling the radiator, one is a 120mm Corsair AF120 Quiet Edition and the other is a stock fan that came with the water cooling kit (120mm).

Would replacing the radiator fans with two SP120s improve temperatures and if so, how much by? Or is the temperatures normal for this voltage?

 

that is normal temperatures for what you are experiencing. honestly, a 5-8° drop

would be seen as that is quite a bit of voltage. have you tried 1.35-1.375 on 4.6?

you'll drop some there and not lose really any functionality of speed on the CPU.

fan-wise, you won't find  a whole lot of expert temperature drops 2-3°.

[Lays]

Firstly, 1.4v is a lot for any cooler except LN2. Have you tried offset voltage? It may help with your temperatures. The pump/res is ok but not the best of strength, i have one too and i am changing it as i will be adding some more water blocks to my build. Changing the fans with the Sp120s won't help much. Maybe at full speed the SP120s may reduce the temperatures by 2C. Adding another radiators would help but the pump may not be able to handle the other radiator and for this reason i am changing my XSPC 750 pump/res combo.

 

1.4v is fine for sandy bridge e, I've had my cpu at 1.57v and max temps were still only 72 on the hottest core.

 

 

 

@op Try getting 4.6 with 1.35v/ 1.375 and get 2 gentle typhoons if you can, or SP120.

[Joshua Ondangan]

try 1.375 @ 4.7 if it's stable. 

 

it's do-able on a nh-d14 got it on there.

 

and af120 seems like garbage for radiators.

 

try get the sp120 or the air penetrator 121 or 123 if similar in price.(in my place it's cheaper than the sp120 and af120)

[ragedev]

The lowest stable voltage for 4.7GHz is 1.395V although I could try for lower but it will most likely be unstable.

I am running an EX240 radiator from XSPC. I really can't have a thicker radiator because of space limitations in my case (Corsair Carbide 300R). As it is I have to mount the radiator fans outside of the case as I have no room inside.

Load power consumption is around 230W (Peak).

[BrightCandle]

The EX240 is a mid fan speed radiator, but its moderately low FPI so you want higher speed fans on it than you currently have, probably around 1500.

 

But do you see this temperature after a cold start? Because its not the fans and radiator cooling if the CPU starts in the high 50's and it climbs gradually over time? That is really the test to do because it could just be your CPU waterblock isn't on very well.

[ragedev]

The EX240 is a mid fan speed radiator, but its moderately low FPI so you want higher speed fans on it than you currently have, probably around 1500.

 

But do you see this temperature after a cold start? Because its not the fans and radiator cooling if the CPU starts in the high 50's and it climbs gradually over time? That is really the test to do because it could just be your CPU waterblock isn't on very well.

From a cold boot, it starts up at around 35C and then gradually climbs until the idle temperature is at around 40C

[BrightCandle]

Load temperatures only, not idle. Idle doesn't tell me much at all.

[ragedev]

After 10 Minutes of Intel XTU Stress testing, Initial load temperatures of around 69-70C and the peak temperatures increased to around 75-76C, Is this normal that the temperatures keep increasing?

 

Edit: The max temperature of the hottest core after another 30 minutes of testing seems to be maxed out at 81C and won't go any higher.

Edit 2: Strange. I had a fiddle around in the BIOS and changed voltage down to 1.36V and it seems to be fine in Intel XTU with load temps of 72C

 

[Amer]

The reason why your temps are so high is not from the OC. It's from the stupid fans. AF's are crap when it comes to Radiator Cooling. (Airdeano told me that). Puts change your fans to SP120's and you're all set.

[BrightCandle]

12C water delta or thereabouts. What happens is that the water temperature gradually climbs to a certain temperature and the CPU is cooled by the water hence it slowly climbs also. 

 

So the loop is slightly underpowered, a better fan with another 100-200rpm will probably get that below 10C but its not dreadful. But the temperature is still +20C of mine (4.4Ghz at 1.35V). So I suspect its the CPU block, its either not performing very well or its not fitted well. Its not uncommon with certain makes to get a bad fitting so try reseating it and doing it again, the peak temperature may very well change.

[Leonard]

1.4v is fine for sandy bridge e, I've had my cpu at 1.57v and max temps were still only 72 on the hottest core.

 

 

 

@op Try getting 4.6 with 1.35v/ 1.375 and get 2 gentle typhoons if you can, or SP120.

I never said that the CPU couldn't handle 1.4v i referred to the cooler not being strong enough for 1.4v. His CPU block is one of the best but the pump in the XSPC750 is not that stronger than the AIO liquid coolers and thus i was lobbying for a longer/thicker radiator and or stronger pump/res combo. 

[ragedev]

Ah. I have slightly lower idle temps now by around 5-7C as I didn't notice but the High Performance power plan caused the minimum processor state to be 100% (4.7GHz) constantly.