Bad 4790k chip?

[TheHappyJarhead]

If i oc my 4790k to 4.8ghz at 1.32v prime95 v26.6 says its hitting 90c but it doesnt feel like its that hot if i open the case and touch the rad.

 

My 4690k at 4.8ghz 1.32v wouldnt even hit 70c on a cryorig r1 ultimate.

[AresKrieger]

If the rad isn't hot try remounting again since it may not have great contact, if it still is hot after that then you likely didn't get as good a drop on the 4790k as the 4690k

[Pankaic]

I can't even push my 4790k past 4.7GHz...
 

[TheHappyJarhead]

Remounted a couple of times, the cooler is deffo working correctly as my idle temps are around 22-25c just like my r1.

[TheHappyJarhead]

1 minute ago, Pankaic said:

I can't even push my 4790k past 4.7GHz...
 

Youre forgetting my cooler is quite the  bit better mate 

[Trey222]

Check the pump they can die sometimes. 

[TheHappyJarhead]

3 minutes ago, Trey222 said:

Check the pump they can die sometimes. 

 if the pump was dead the tubing and the rad would be hot, the pump also makes a little noise on these coolers.

 

Plus 22-25c idle temps wouldnt happen on a dead cooler

[DarkBlade2117]

Don't use Prime95 to test temps.

In any real world situation you'll probably hit a 80C max. Run cinebench then 3Dmark and go game on a CPU intensive game for an hour and see what your max temp was with like HWMonitor.

[Trey222]

3 hours ago, TheHappyJarhead said:

 if the pump was dead the tubing and the rad would be hot, the pump also makes a little noise on these coolers.

That is true. It sounds like you may have just gotten a lower binned 4790k

[TheHappyJarhead]

1 minute ago, DarkBlade2117 said:

Don't use Prime95 to test temps.

In any real world situation you'll probably hit a 80C max. Run cinebench then 3Dmark and go game on a CPU intensive game for an hour and see what your max temp was with like HWMonitor.

Prime95 26.6 is usually fine, 28.6 adds ridic temps on top of what 26.6 already gives, i think i tried intel xtu but il have to revisit it and see if it gave me same temps.

[AresKrieger]

2 minutes ago, TheHappyJarhead said:

Remounted a couple of times, the cooler is deffo working correctly as my idle temps are around 22-25c just like my r1.

Well then you likely got a bad drop, it happens, it's funny how I got a relatively good 4790k but I never bothered to get a cooler, I probably should but I've just been lazy, though I don't know how it handles substantial voltage increases either.

 

Either way you got unlucky, though I wouldn't be using prime 95 for my test, aida or intel xtu is more realistic.

[TheHappyJarhead]

2 minutes ago, Trey222 said:

That is true. It sounds like you may have just gotten a lower binned 4790k

Probably so mate, could be worse, could have been a 4770k

[SeanBond]

33 minutes ago, TheHappyJarhead said:

If i oc my 4790k to 4.8ghz at 1.32v prime95 v26.6 says its hitting 90c but it doesnt feel like its that hot if i open the case and touch the rad.

 

My 4690k at 4.8ghz 1.32v wouldnt even hit 70c on a cryorig r1 ultimate.

Those temps are pretty awful. First suggestion I will make is not using prime and use aida64 or intel extreme tuning utility. I have a corsair h110 and my 4790k runs 4.7ghz at 1.34v but my stress tests temps usually only get around 86c. I think the worst I've ever seen was 88. Your cooler should be at least a few degrees better and my voltage is even higher. Prime has been a problem for haswell chips before so maybe it's just that. 

[aisle9]

1 hour ago, TheHappyJarhead said:

Remounted a couple of times, the cooler is deffo working correctly as my idle temps are around 22-25c just like my r1.

I think you came up three numbers short of a winning ticket in the silicon lottery this time around.

[Vengeance_K1ng]

OP, Please don't take advice from people who have no idea about thermal basics on Haswell. Prime 95 version 26.6 is the BEST stress testing program out there. 26.6 is meant for Haswell and its goal is to push the CPU as hard as it possibly can.  Aida64, OCCT, XTU, all of which don't even get nearly as close to prime in hard CPU stress testing. 90C is really hot, and i would suggest remounting. 

 

Here is the post from Toms Hardware:

 

Prime95 Version 26.6 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload which runs Core 2 processors and Core i variants with Hyperthreading within 3% TDP at stock settings. This is the test that Real Temp uses to test sensors.

Core i 2nd through 6th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95 such as 28.9 run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the utility AIDA64 shows similar results.

Prime95 v26.6 produces temperatures on 3rd through 6th Generation processors more consistent with 2nd Generation, which also have AVX instructions, but do not suffer from thermal extremes due to having a soldered Integrated Heat Spreader and a significantly larger Die.

Note: Keep in mind that we're thermal testing only. Stability testing is not within the scope of this Guide, which assumes your rig is stable. If you're overclocked, then a combination of stress tests, apps or games must be run to verify CPU stability.

If you’re overclocked and run AVX apps, you may need to reduce Vcore and clock speed and / or upgrade your cooling so that Core temperatures don’t exceed 80C. Asus RealBench runs a realistic AVX workload within 3% TDP at stock settings, however, it’s a cyclic workload for stability testing, which isn’t suitable for CPU thermal testing.

Prime95's default test, Blend, is also a cyclic workload for testing memory stability, and Large FFT's combines CPU and memory tests. As such, Blend and Large FFT's both have cyclic workloads which aren’t suitable for CPU thermal testing.

Other stability tests such as Linpack and Intel Burn Test have cycles that peak at 110% workload, which again aren’t suitable for CPU thermal testing. The test utility OCCT runs elements of Linpack and Prime95, but will terminate the CPU tests at 85C.

The "Charts" in SpeedFan span 13 minutes, and show how each test creates different thermal signatures. 

Shown above from left to right: Small FFT's, Blend, Linpack and Intel Burn Test.

Note the steady-state thermal signatures of Small FFT's, which allows accurate measurements of Core temperatures. A steady-state 100% workload is critical for thermal testing.

Shown above from left to right: Small FFT's, Intel Extreme Tuning Utility CPU Test, and AIDA64 CPU Test.

Intel Extreme Tuning Utility is also a cyclic workload. Although AIDA64's CPU test is steady-state, the workload is well below TDP, which is insufficient for thermal testing. All other AIDA 64 CPU test combinations are cyclic workloads, which again aren't suitable for thermal testing.

[Vengeance_K1ng]

2 hours ago, Pankaic said:

I can't even push my 4790k past 4.7GHz...
 

Same bro, 4.8 is my limit as it needs about 1.39 volts

[TheHappyJarhead]

I first had my cooler mounted on the front of the case as intake, i then moved it to the top as an intake which is what it is now, i use noctua af-14s as the stock x61 fans were ridic loud, best thing i can do, is change the cooler back to its original position and also test it against my r1 ultimate.

[jjohnthedon1]

14 hours ago, TheHappyJarhead said:

If i oc my 4790k to 4.8ghz at 1.32v prime95 v26.6 says its hitting 90c but it doesnt feel like its that hot if i open the case and touch the rad.

 

My 4690k at 4.8ghz 1.32v wouldnt even hit 70c on a cryorig r1 ultimate.

Trust that's fine for prime temps

run Intel extream tuning if u want gaming temps because I get 55c in that under full load and that's the highest it's ever been in gaming too