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Corsair Obsidian 250D Club - Page 28

post #271 of 3056
Quote:
Originally Posted by Sinate View Post

The second I start Prime95 the temp of my i7 4770k instantly jumps to 100c and immediately starts underclocking with alerts going off like crazy. My previous i7 930 overclocked to 3.8ghz with an H80 was very happy at 68c with prime95. Fudge frown.gif

Sounds like the waterblock isn't sitting right on the CPU...reseat it.
post #272 of 3056
Quote:
Originally Posted by FuzzDad View Post

Sounds like the waterblock isn't sitting right on the CPU...reseat it.

I just checked it, it appears to be ok, at about 60% load temps are around 85c, I have ran out of thermal paste, so a complete re-seat will need to wait till Monday. I just loosened off the screws abitto ensure it was flat against the CPU and tightened the screws 1 half turn for each screw until tight. No change in temps. I guess I need to renew the paste on Monday and try again frown.gif

But temps vary per program I look at.

Corsair Link says 44c idle
Real Temp says 40c idle
Asus AI Suite 3 says 36c idle

Playing D3
Corsair Link says 88c
Real Temp says 79c
Asus Ai Suite 3 says 48c

I have no idea at all right now..
Edited by Sinate - 3/15/14 at 3:33pm
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i7 930 @ 3.8Ghz Asus P6X58D-E ASUS GTX 570 DCU II 6gb (3x2gb) DDR3 9-9-9-24 
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The Little Beast
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The Old Dinosaur
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Corsair 240Gb GT Corsair H80 Win7 64-bit Ultimate Acer GD245HQ 
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post #273 of 3056
That can't be right, I am running the H100i fans at 700rpm and temp of the CPU under normal load is 37degrees Celsius. The pump must not be seated right. I would suggest you refit it, but clean the CPU and pump and reapply some thermal paste.
post #274 of 3056
Also check how your backplate threads sit in the holes in your motherboard. I was having similar issues. I found out due to the thickness (or should I say thinness) of the Impact, the threads from the backplate were protruding through the motherboard which did not allow the cooler to be fully seated.
The protrusion does not allow the standoffs to be fully tightened to the motherboard. As a result, the pump doesn't make full contact with the CPU when the thumbscrews are tightened.

The solution is to use a couple of washers as spacers.

And then attach them like this:

The threads will not protrude, but sit perfectly flush within the holes of the motherboard.
post #275 of 3056
Yes I found that when I attached the backplane it was slightly loose but once I fitted the pump and put the screws on it was fixed, so I didn't use washers, so that may not be his issue (easy to find out by trying to move the pump on the CPU).
post #276 of 3056
I thought the same thing as well. Before I put the washers on, my pump didn't move on the CPU. When the standoff screws are screwed it will only tighten until it hits the protruding mount.

That will effectively tighten the pump when screwed down (pump won't move), but won't allow full clamping force to the CPU. That can cause higher than normal temps or/and a widely varied temp among cores.
It should look like this:

That will allow full clamping force. This does not affect all motherboards, but it does affect some include the Impact.
post #277 of 3056
Quote:
Originally Posted by Sinate View Post

I just checked it, it appears to be ok, at about 60% load temps are around 85c, I have ran out of thermal paste, so a complete re-seat will need to wait till Monday. I just loosened off the screws abitto ensure it was flat against the CPU and tightened the screws 1 half turn for each screw until tight. No change in temps. I guess I need to renew the paste on Monday and try again frown.gif

But temps vary per program I look at.

Corsair Link says 44c idle
Real Temp says 40c idle
Asus AI Suite 3 says 36c idle

Playing D3
Corsair Link says 88c
Real Temp says 79c
Asus Ai Suite 3 says 48c

I have no idea at all right now..

I tried again and again to re-seat the water block, tightening as much as possible.... still the same terrible temps.

So I tried the suggestion here of adding washers, I found some nice plastic 2mm thick ones and dismantled my new PC once again. Reapplied the thermal paste same as all the previous times.

now.... I have:
Real Temp says 30c idle

Playing D3
Real Temp says 45c, peak was 53c

Asus or Corsair should really identify this in the instructions, as this cost me a crap load of time and I am sure I gained a few gray hairs in the process.

Update:
Prime95 test ran for 10 mins @3.9ghz. Max temp was 70c on balanced fan mode.

Previously it ran for 1 second before hitting 100c and massively under-clocked the cpu

Thanks guys! At least when I get the same setup for my misses I will have a bit more of a clue what to do.
Edited by Sinate - 3/16/14 at 3:18am
The Little Beast
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Logitech G19 Corsair 850HX Coolermaster HAF 932 Razer Naga Epic 
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The Little Beast
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The Old Dinosaur
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CPUMotherboardGraphicsRAM
i7 930 @ 3.8Ghz Asus P6X58D-E ASUS GTX 570 DCU II 6gb (3x2gb) DDR3 9-9-9-24 
Hard DriveCoolingOSMonitor
Corsair 240Gb GT Corsair H80 Win7 64-bit Ultimate Acer GD245HQ 
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Logitech G19 Corsair 850HX Coolermaster HAF 932 Razer Naga Epic 
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post #278 of 3056
The front 120mm intake fan doesn't seem to push much air. I'm thinking of replacing it with a 200mm one. Which 200mm fan do you guys recommend?
post #279 of 3056
T
Quote:
Originally Posted by silencer51 View Post

The front 120mm intake fan doesn't seem to push much air. I'm thinking of replacing it with a 200mm one. Which 200mm fan do you guys recommend?

The front fan is a 140mm fan. A 200mm would be good. Do you have a 240mm rad to the side? If you do, I think you'll run into an issue trying to fit it in there.
post #280 of 3056
Sorry, yeah indeed its a 140mm one. Quiet but ineffective methinks.

My build is aircooled, so there's no rad to get in the way.
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