ASUS P8Z68-V + i5 2500K + corsair H50 = Ghz?

BarBrawllin

BarBrawllin

BarBrawllin

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Hi all!

Im just wondering how far i could get an i5 2500K on a corsair H50 watercooler?

I was hoping for 4.6Ghz maybe 5Ghz if i hit the jackpot with the CPU i get but id like a rough estimate based on experience with the hardware i'll be working with.

I have a thermaltake case that has a decent amount of space,a small side fan on the perspex window and a 120mm front intake fan. I have the H50 screwed into the back of the case and have 2x 120mm fans on it,one blowing air through it and the other is sucking it out,push-pull.

Will this setup be good enough for 4.6Ghz? What do you guys reckon the maximum overclock would be if the CPU was a good one? Is 5Ghz possable or should i forget about these crazy idea's and be happy with like 4.5Ghz lol?

Cheers!
 
iTek said:
Im running at 4.6Ghz quite happily, temps are fine, 5Ghz? stop being greedy :D
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I'll stop being greedy but i will still try 5Ghz when the time comes lol.

4.6Ghz with good temps sounds GREAT to me,im going from a 3.4Ghz E6600 so the i5 even at stock speed gets like 5x more Gflops so this will be a massive upgrade for me im sure!

BTW,what voltage are you giving the CPU?

Thanks for the reply!
 
I came from a Q6600 and noted a great difference.

I am running at 1.3125v at 4.6Ghz, idles at 32C and toast at 63C. I tried going higher but it needed more voltage and was unstable atfter some prime testing.
 
iTek said:
I came from a Q6600 and noted a great difference.

I am running at 1.3125v at 4.6Ghz, idles at 32C and toast at 63C. I tried going higher but it needed more voltage and was unstable atfter some prime testing.
Click to expand...

Those temps look good to me! I hope i get the same results!

First thing i'll do is try it at the voltage/speed you have yours running and see if its stable,hopefully it is(if not i'll put the voltage up a little bit),then i'll try the 5ghz junk and probobly fail but i wont care cause i'll still have a kick-ass i5 lol.:cool:

Whats the maximum safe temps for the i5? I read somewhere that intel says its 72.5C but id like to be at LEAST 5C below the max when running a burn test/prime95.

1 more question,whats a better test of the systems stability? I think i remember hearing something like intelburntest is good for testing the CPU stability but not really the RAM stability. I always relied on burn test with the C2D CPU's.

Cheers for the input,no more worries about the cooler now!:D
 
72.6 C is declared on intels spec sheet, I expect it would go a little higher then that but of course its not a good idea, I dont know if the processor would throttle anyway afer such temperatures.

I see no reason you wont get similar temps to me, mine seem to be in keeping with most other users running same speeds.

For stabilty I always go for inteli burn test if it passes move on to prime95 where it test (LOTS) of the memory. The memory for me is not a big issue because your overclocking using the multiplier and not the bus like the C2D days...
 
If you're are going to run IBT set it to 20 runs on Maximum Stress Level, it's pointless running on standard, that hardly stresses the Cpu at all.
Once you've found your best 24/7 speed with lowest stable vcore on IBT, run Prime 95 blend test for at least 8 hrs.
Then get gaming for a couple of weeks, if you have no bsod in that time then you're pretty stable

On a H50 you may get to 4.6GHz, beyond that you'd need a pretty special chip as vcore and temps start to ramp up quickly when you enable Internal PLL overvoltage, which you'll need in most cases when you go over 4.6GHz ;)
 
Davefran said:
If you're are going to run IBT set it to 20 runs on Maximum Stress Level, it's pointless running on standard, that hardly stresses the Cpu at all.
Once you've found your best 24/7 speed with lowest stable vcore on IBT, run Prime 95 blend test for at least 8 hrs.
Then get gaming for a couple of weeks, if you have no bsod in that time then you're pretty stable

On a H50 you may get to 4.6GHz, beyond that you'd need a pretty special chip as vcore and temps start to ramp up quickly when you enable Internal PLL overvoltage, which you'll need in most cases when you go over 4.6GHz ;)
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If i can get to 4.6Ghz stable thats perfect,id even be happy with 4.4Ghz!(although i would be a tiny little bit dissapointed if i didnt reach my goal of 4.6Ghz lol)

I'll try and get it as fast as possable within the 72.6c temp limit just to see how fast it can go,but im going to aim for a temp of 67c-68c maximum for 24/7 usage,im hoping the CPU will last me at least 5 years so i dont want to stress it out or degrade it!

On another note, i used to stress test my E6600 and let it get up to the 80's and above with up to 1.65v (i kept trying to get 3.6Ghz over the years but it didnt like anything higher than 3.4Ghz) and its still alive 5 years later.
When i got the H50 i thought id be able to get 3.6Ghz on it easy but i found out that its not all about temps and that the CPU just gives up after a certain speed no matter how much power you supply it. My 24/7 voltage for that was 1.425v and it would hit 72c-75c during IBT.I must have ran IBT on it hundreds of times over the years and im surprised it didnt just die:eek: lol.

I wont treat the i5 with the same brutality though,don't want to push my luck considering i dont seem to have any these days lol.
 
I have that Mobo and Chip and can run 5Ghz 24/7.

I am using an Nh d14 though. Load temps are 70-75 with the central heating going.
 
RichH said:
I have that Mobo and Chip and can run 5Ghz 24/7.

I am using an Nh d14 though. Load temps are 70-75 with the central heating going.
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Not all CPU's are the same only about 10% can do 5GHz with good enough cooling and the Noctua NH-D14 is miles better than the Corsair H50 ;)
 
Yeah I know this, although I didn't know the nh-d14 was loads better than H50.

Why do people buy budget water coolers though when there are better air coolers about?
 
Case not big enough
Have already got ram with large heatsinks
ALC's look smarter and make the case less cluttered
or under the misguided opinion that ALC's run cooler and quieter than air coolers
 
iTek said:
72.6 C is declared on intels spec sheet, I expect it would go a little higher then that but of course its not a good idea, I dont know if the processor would throttle anyway afer such temperatures.

.....
Click to expand...

hi there is this for the core temp that can be seen using real temp / core temp and etc? Ive look at the spec sheet and it says Tcase which I do not know the meaning of.

THanks
 
The temps you see in core temp / real temp are NOT Tcase temp

Definitions for commonly misused and misunderstood terms.

Digital Thermal Sensor (DTS): Each core has its own DTS and this is where the Tjunction or core temperature reading is taken from. The DTS reports a relative distance to a fixed temperature (Tjunction Max) which must then be translated to an absolute temperature by software using the formula shown later in this post. This is usually called Distance to Tjunction Max or Delta to Tjunction Max. The primary function of the DTS is to regulate thermal protection mechanisms, not retrieve core temperatures.
The DTS is more accurate at temperatures closer to Tjunction Max and decreases in accuracy as temperature decreases.
Tcase: Technically this refers to the temperature that you can measure using a thermocouple embedded in the centre of the heat spreader, but this is only done in the factory by Intel or by users willing to drill their heat spreaders open to insert a thermocouple. Therefore Intel provided a diode between and below the cores with a reading calibrated by the BIOS which can be used instead. This reading can vary greatly when the BIOS version is changed, but will not necessarily change if the BIOS calibrations were not altered between versions.
Software supplied by motherboard manufacturers typically reads only this sensor, not the DTS. It is often labelled “CPU.” SpeedFan usually labels this as “CPU” as well.

Tcase Max and Thermal Specification: Can be found on the Intel Processor Spec Finder. This is often confused by users as the maximum temperature for the cores, but in actual fact it refers to the maximum temperature that should be reached by the Tcase sensor. This specification is rounded to a relatively precise 0.1 C.
The only exceptions are mobile CPUs which do not have a heat spreader, where Thermal Specification refers to Tjunction Max instead and is rounded to the nearest 5 degrees.
Tjunction: Synonymous with core temperatures and calculated based on the output from the DTS using the formula shown further down in this post.
Tjunction Max: This is the maximum temperature the cores can reach before the PROCHOT# signal is sent and thermal throttling is activated, although throttling typically occurs a degree or two below this. In this post Tjunction Max refers to either the actual throttling point for a core/CPU or what is used by a temperature monitoring program.
As you will read in the definition below, Intel released a list of values for use by temperature monitoring software which are rounded to the nearest 5 degrees. Remember that the DTS is only meant for controlling thermal protection, so precise rounding is not required.
Tjunction Target: According to Intel Tjunction Target is synonymous with Tjunction Max and this is their official term for it. This is true in the sense that the value for Tjunction Max that most enthusiasts will use in temperature utilities will be an estimate or average just like Tjunction Target. However, as discussed later on, Tjunction Max is not a fixed value.
Intel provided a small range of Tjunction Targets at the August IDF and for all CPUs at the October IDF in 2008. Many debated how correct some of those values were as they caused strange readings when used (below ambient on air cooling). After a bit of persuasion from certain individuals, Intel subsequently updated several of the Tjunction Targets to more realistic values, claiming a “mistake.” Unfortunately this update went largely unnoticed except by temperature utility developers, and many guides still recommend the old values.
In this post Tjunction Target will be used when referring to Intel’s “specifications” for Tjunction Max.
“Stuck” sensors: All sensors have a point at which they no longer respond to decreases in temperature. In many cases, particularly with the sensors used on 45nm Core 2 CPUs, these sensors stop responding at temperatures well above ambient and make idle temperature appear unrealistically high. This is often referred to as “sticking” by users and “bottoming out” by Intel. While the temperature is above the “sticking” point the sensors usually act normally.
Contrary to popular belief, this is not a fault and is not a justification for an RMA.
 
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