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Ivy bridgers.. help me understand this

post #1 of 10
Thread Starter 
I have seen many here manage to get good overclocks from cheap coolers like Hyper 212 EVO on an i5 3570k or i7 3770k.
Most will peak out at 4.5Ghz depending on their chip and the overclock will be good enough to use on a daily basis without Folding.
Now, the investment for an extra ~0.9Ghz overclock should be $35 ontop of the chips price. That makes plain financial sense since even intel would make you pay through the nose had they to sell you a chip that actually does 4.5Ghz at turbo.

Thus far I understand. What I don't understand is why someone will fork out an extra $80 since even if they sell their EVO which may probably fetch $20 so that in total they have $100 and invest in an expensive cooler only to garner an extra 300Mhz over the EVO for 24/7 use. Now if we take an actual real life gain for example encoding, I realized you will gain roughly the same amount per extra clock i.e.

If your chip takes 12min to encode a full HD video from VOB to mkv with specified size on Handbrake then if you now clock it up to 4.5Ghz from stock speed and make an analysis of the same you will realize your chip just did the same process in ~9min 35sec which is a 2min 24min saving. That even feels worth it because the gain roughly matches the percentage overclock and you probably bought the cooler with pocket change.

Now if you clock it upto 4.8Ghz and run the same encoding you will only save ~36sec vs an overclock of 4.5Ghz but saves 3 mins from stock. To have your chip running reliably 24/7 at 4.8Ghz you will need to have primed it long enough for it to be deemed stable. Most coolers that hack this frequency are well in the $100 category or just about unless you get one through an ongoing promotion cheaply.
From this brief test the gain from 4.5Ghz vs stock was ~23% but the gain from 4.8Ghz vs 4.5Ghz was ~6%.

You might be wondering, how did I make it to 4.8Ghz yet it featured in my plans to buy a more capable cooler? We'll I just took the general settings known to give an ivy stability at that core speed and did the encoding without priming since my present cooler can't hack the heat and never will you see real world temps matching prime temps.

I chose encoding because it takes advantage of most of the instruction sets in the chip and really uses up the core in a manner almost similar to how prime hogs up the chip. I actually ran this encoding test a week ago when I was torn between benefits vs overclocks vs investment. I really don't see why I should even spend more than $40 if at that price on the replacement cooler if it cant stabilize at 4.8Ghz. Now help me understand why do most people buy expensive coolers yet the gains are super peanuts going from 4.5 to ~5Ghz? Why pay an extra $80 for 6% gains when initially the gains were optimal at 23% vs stock? What is it that you can't do at 4.5Ghz that you can do at 4.8-5Ghz?
Edited by TLM-610 - 4/1/13 at 4:23pm
post #2 of 10
Overclocking is not always a price / performance thing.
Look at it this way. You can't buy a 4.8GHz CPU right now. Overclocking gives you that.
post #3 of 10
I dont think this pertains to only ivy bridge buyers, but to ocers in general. Having said that, I agree with you I run the hyper 212 for around 20 bucks, and whenever I build a comp for someone, even if they do have the money I do not get them the top of the line, I get them good performance for the money. For example, I almost always recommend a 670 over a 680, or a 7950 over a 7970.
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post #4 of 10
Some people just like overclocking things. I love tweaking my computer parts, but I'm to poor to buy alot so I'm stuck with a bad motherboard and cpu.

(I'm a sandy bridger. I'd prefer getting ivy bridge, but money is low these days).
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post #5 of 10
You're looking at this the wrong way. Most people here aren't looking to hit the most efficient point in price/performance/heat/power consumption. Many just clock their chips as high as they'll go (within reason, for the most part). We clock our chips this high not because we absolutely cannot live without that extra bit of performance, we clock our chips this high because we can. thumb.gif
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post #6 of 10
Ha, im on the boat of hyper 212 stuck on 4.5ghz with 3770k. Im fine though.
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post #7 of 10
It pretty much all depends on the your chip. If you have a really good chip, it wouldn't need that expensive of a CPU Cooler to keep it cool and vice versa. Some guys get 4.5Ghz at no less than 1.3V, whereas other have it below 1.2V. There wont be a difference in speed, but there would definitely be a difference in the heat generated.

4.5Ghz is an excellent overclock if you can stabilize it and get decent temps. 5Ghz is even better, but only a few Ivy guys have good enough chips to run 5Ghz 24/7 without hitting the threshold. But just like you said, there's nothing that can't be done at 4.5Ghz that really requires 5Ghz speed. And yes, the differences are not a huge one at all.
post #8 of 10
Quote:
Originally Posted by TLM-610 View Post

I have seen many here manage to get good overclocks from cheap coolers like Hyper 212 EVO on an i5 3570k or i7 3770k.
Most will peak out at 4.5Ghz depending on their chip and the overclock will be good enough to use on a daily basis without Folding.
Now, the investment for an extra ~0.9Ghz overclock should be $35 ontop of the chips price. That makes plain financial sense since even intel would make you pay through the nose had they to sell you a chip that actually does 4.5Ghz at turbo.

Thus far I understand. What I don't understand is why someone will fork out an extra $80 since even if they sell their EVO which may probably fetch $20 so that in total they have $100 and invest in an expensive cooler only to garner an extra 300Mhz over the EVO for 24/7 use. Now if we take an actual real life gain for example encoding, I realized you will gain roughly the same amount per extra clock i.e.

If your chip takes 12min to encode a full HD video from VOB to mkv with specified size on Handbrake then if you now clock it up to 4.5Ghz from stock speed and make an analysis of the same you will realize your chip just did the same process in ~9min 35sec which is a 2min 24min saving. That even feels worth it because the gain roughly matches the percentage overclock and you probably bought the cooler with pocket change.

Now if you clock it upto 4.8Ghz and run the same encoding you will only save ~36sec vs an overclock of 4.5Ghz but saves 3 mins from stock. To have your chip running reliably 24/7 at 4.8Ghz you will need to have primed it long enough for it to be deemed stable. Most coolers that hack this frequency are well in the $100 category or just about unless you get one through an ongoing promotion cheaply.

You might be wondering, how did I make it to 4.8Ghz yet it featured in my plans to buy a more capable cooler? We'll I just took the general settings known to give an ivy stability at that core speed and did the encoding without priming since my present cooler can't hack the heat and never will you see real world temps matching prime temps.

I actually ran this encoding test a week ago when I was torn between benefits vs overclocks vs investment. I really don't see why I should even spend more than $40 if at that price on the replacement cooler if it cant stabilize at 4.8Ghz. Now help me understand why do most people buy expensive coolers yet the gains are super peanuts going from 4.5 to ~5Ghz? What is it that you can't do at 4.5Ghz that you can do at 4.8-5Ghz?

Pride/Epeen

too see if I can

if its not broke fix it.

the urge/need to push things beyond their limit

overclocking is rarely a
price/performance thing, since eventually down the line you might run into errors/data corruption, headaches/heart aches, I mean why do they make cars that go faster than 70 when that is pretty much the max speed limit and 99% of the population will never take their car to a track? (possibly a poor analogy so dont make it walk on all fours)
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post #9 of 10
Thread Starter 
@Jim888

Perfect sense!

@Ali Man

True and very much agree with you but 6% better?! How does that make you Kingpin? ... I mean ... am a mm right behind you in the race!

@junkerde

Am feeling the same way too.

@ Vonnis

Very true, my brain lost weight just trying to make up a good excuse why I should buy a +$100 cooler just for 6% gain

@ Kman3107

Before I got an ivy bridge I was on an E5700 with a stock cooler and had overclocked it to 3.5Ghz, I had set my mind on the Q9400 since I didn't have the cash and was a wish that never came true. Now am an ivy bridger and didn't know where to get cash but an opportunity arouse and I took advantage, everyone has their day. You wish for ivy you may get a gravy bridge (4x faster than anything around). It happens it's life.

@ IBooNI and Zalbard

I agree, atleast I can relax now
post #10 of 10
Quote:
Originally Posted by TLM-610 View Post

@Ali Man

True and very much agree with you but 6% better?! How does that make you Kingpin? ... I mean ... am a mm right behind you in the race!

Well I've honestly only seen that difference in benchmarks, haven't tried it with handbrake or real time app's as yet. But here's the thing, unless you aren't compressing/decompressing and using the CPU to the max potential the whole time while on it, then I really don't see any use for it to be at 5Ghz.

I myself have my 3770K at 4.5Ghz and there has never been a bottleneck with anything at that speed.
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