3770k hotter than 3570k?

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ericjohn004

ericjohn004

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Oct 26, 2012
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I have a 3570k and I overclocked it to 4.7Ghz with 1.350v on my UD5H motherboard. My temps with my H100i hover around the lower 70's. Which is great for a 4.7Ghz overclock on an Ivy Bridge chip. At 4.5Ghz and 1.250v, my temps are in the low 60's. Some cores are in the 50's.

There's a long reason as to why I did this but I bought a 3770k to replace my 3570k(I thought the chip was bad but it was the RAM). I put the 3770k in and applied the exact same overclock to it as the 3570k at 4.7Ghz. The problem was, the temps were in the high 80's closing in on the 90's. And it's not because I put the cooler on wrong or thermal paste or anything. I redid every thing twice with same results and as soon as I went back to my 3570k I got great temps again.

It took me to go down to 4.5Ghz at 1.250v to get the remotely the same temps as my 3570k at 4.7Ghz with 1.350v, maybe a little worse. So to me, I rather have the 3570k with the great temps and more overclocking capability than having a 3770k and having to look at those high temps every time I check for stability.

My question is: Is a 3770k normally hotter than a 3570k? I would think so, being that the 3770k has 8 threads. But I wasn't expecting the difference to be 12-13c like it was. I was expecting a 3-5c difference. Maybe 7-8c at the most.

So did I just get a bad chip? I'll be returning it anyways since my 3570k ended up not being the problem. And to me, I rather have a 3570k running a 4.8Ghz than a 3770k running at 4.5Ghz with the same temps. The 3570k will be better for gaming with the higher clocks anyways.

So if it is that I just got a bad chip. Then this means that no two processors can be compared to one and other. You can't ask "Is this overclock good or normal?" or "Are my temps good for this voltage with this cooler?". Because you won't have consistent numbers between two processors of the same kind.

Any insight on this will be appreciated.
 
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mouse24

mouse24

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You are certainly correct in that no two chips are exactly the same and will overclock to the same frequencies at the same voltages and temps. I would just assume through common sense as you have already pointed out: a 3770k is hotter because more cores, whether logical or physical. But as long as it passes intels initial requirement list it is a solid chip to them, you could have the best 3570k in the world and the worst 3570k even if they were made from the same silicon wafer and as long as it passes whatever tests they do (I assume they only test it at stock freqs) then it makes no difference to them.

That said, yeah 12c does seem a bit surprising, though my Athlon 2 x3 goes up about 6c when unlocked to a athlon 2 x4.
 
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ericjohn004

ericjohn004

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Is the Anthlon 2 x3 a 3 core processor and when you unlock it, it goes up to a 4 core processor? If that made it 6c hotter than going from 4 to 8 must really pile on the heat.

I was actually surprised at these results because I've read articles saying that a 3570k was hotter than the 3770k. Which didn't seem accurate.

I actually have 2 3570k's in my house. One is my brothers. And we seem to get the exact same temps. I'm just wondering if this 3770k was an outlier or if this is normal.

Anyone there has a 3770k that can tell us their temps? Or anyone who has came in contact with both?

 
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JackNaylorPE

JackNaylorPE

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If ya check the benchmarkreviews site on Sandy bridge overclocking, you will see that 7C separate the 2500k from the 2600k ... same reasoning holds

http://benchmarkreviews.com/index.php?option=com_content&task=view&id=730&Itemid=38&limit=1&limitstart=8

What I do when setting up OC's on Asus enthusiast builds is use go for like 4.6 Ghz for 24/7 use with Hyperthreading and then go for 4.8 to 5.0 Ghz with HT disabled for extreme gaming. Ya choose which set of BIOS settings to boot to from in the BIOS. I have seen as much as 8 - 10C drops just turning off HT
 
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ericjohn004

ericjohn004

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Oh ok. Now that I just went check, the difference was actually closer to 10c. Almost 10c on the dot. But I didn't like that one bit. So much so that I reinstalled my 3570k just to get my temps down. Getting an extra 10c gives me leeway to get an extra .3Ghz. Which would give me more gaming performance than a 3770k anyways. The 3770k may be a little faster with Multithreading. But once you factor in that .3 extra Ghz the difference isn't that large at all. Plus you'll get better single core performance and that'll give you a boost in gaming.

For me, seeing temps around 88c with a H100i and 3770k at 4.7Ghz made me feel like my whole setup was just hot and that something wasn't right. Even though I know nothing was wrong with anything. Having a nice cool 3570k at 4.7Ghz and only around 78c just "felt" a whole lot better for me. Now, in the future when I go to choose a processor with or without HT, I'll probably go with the one that's without HT just because of the temps. IDK I think I'm just a little OCD with my temps, haha.


Edit: You should know that when I say my temps are 78c or 88c. I go by the MAX temp on the HOTTEST core. Not the averages. If I were to go with averages my temps would have been more like 82c for the 3770k and 72c for the 3570k because 78 or 88c was just barely being reached by those processors every now and then and only by one core. I say this for those of you who might think those temps were a little high for an H100i.
 
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JackNaylorPE

JackNaylorPE

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Again, there is a simpler solution than changing CPUs. Just turn off HT.

Most peeps use their machines for more than just gaming. Using the BIOS Utilities present on enthusiast level MoBos, you can create that 4.5 GHz setup with HT enabled and use that to run your applications or other "9 to 5" activities. "Save" that BIOS profile as say "everyday" profile and then create one w/ HT tuned off and match your 3570 setup. I don't have a huge volume of experience to go on ..... to be statistically valid, you'd need 100s of builds to compare but I find I myself agreeing with most other posters in that you are able to get 0.1 Ghz, maybe 0.2 Ghz, more on a 3770k w/ HT off than ya can with a 3570k.
 
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