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Which Processor?

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July 26, 2012 7:34:58 PM

My new (first) build is going to comprise of:

CPU: Intel Core i7 ????
Motherboard: ??????
RAM: Corsair 16GB
PSU: Corsair CMPSU-850
Case: Cooler MasterElite 430

Based on prices in England, should i go for the:

2700k @£231
3770k @£256
3820 @£228

am i right in thinking the 3820 cant be overclocked?

and what motherboard would you recommend with it?

Im trying to build an all round computer that can handle games on ultra at full HD but also intense multi tasking possibly with at least 2 screens.

More about : processor

July 26, 2012 7:50:42 PM

I was thinking the XFX ATI Radeon HD6950 and i would cross fire them later. They seem relatively cheap and are solid beasts. Any ideas about a motherboard?

I had a look at the Gigabyte GA-Z77X-UD3H but am unsure how to work out if its good enough for my requirements.
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July 26, 2012 8:07:36 PM

Also its an extra £80 for the 3770 i7 v the 3570 i5. I will be using the rig for alot more than gaming, including 3D CAD, which i understand would be one of the reasons for going for the i7 over the i5. Is this true.

Also i understood that only processors with a k (eg 3770k) after the model number can be overclocked.
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July 26, 2012 8:10:50 PM

Anonymous said:
i7 3820 can go to 4.5Ghz without a problem were did you got the idea it can't be overclocked?

http://valid.canardpc.com/show_oc.php?id=2269861

is an unlocked processor....


Its not a K CPU, it has turbo boost but from what i know the only unlocked intel CPUs have a K at the end of their model numbers..
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Anonymous
July 26, 2012 8:11:19 PM

This is why i say not to ivy cpu's my 3rd post in details:

http://www.tomshardware.co.uk/forum/340000-10-corei-792...

The cpu's thread is full with ivy cpu's on stock speed having overheating problems and Searching for a new cpu cooler, new thermal paste, when in the above link i proved nothing will help them!
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July 26, 2012 8:11:38 PM

The i7 will be best for your needs, get i5s if you are only gaming.
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Anonymous
July 26, 2012 8:14:13 PM

jay_nar2012 said:
Its not a K CPU, it has turbo boost but from what i know the only unlocked intel CPUs have a K at the end of their model numbers..


what turbo boost you didn't see the multiplier x 36 ? is oc stable 125 x 36 = 4.5 Ghz

do you know what is OC?

the processor is unlock you can take the multiplier to x50 if you like but the heat is another thing
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July 26, 2012 8:18:04 PM

Anonymous said:
what turbo boost you didn't see the multiplier x 36 ? is oc stable 125 x 36 = 4.5 Ghz

do you know what is OC?


So that means all CPUs are unlocked in a way?
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Anonymous
July 26, 2012 8:19:02 PM

jay_nar2012 said:
So that means all CPUs are unlocked in a way?


the locked cpu's cant go above x9 or x10 are you having fun or no clue?
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July 26, 2012 8:20:31 PM

so do you all think that if im planing to overclock and crossfire, go for the sandy bridge 2700k in order to keep temperatures stable?

Also will the Cooler MasterElite 430 be enough or will i need extra cooling?
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Anonymous
July 26, 2012 8:23:26 PM

Yes you will overclock beause you can, is easy. the problem is jay_nar2012 is jocking? or misleading people in perpuse?
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July 26, 2012 8:25:00 PM

Anonymous said:
Yes you will overclock beause you can, is easy. the problem is jay_nar2012 is jocking? or misleading people in perpuse?


I thought that intel 'k' CPUs were unlocked only , i wasn't 'jocking' or misleading on purpose.
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Anonymous
July 26, 2012 8:28:49 PM

I giving you a link you see the multiplier to x36 and you can't tell that was an overclock? What turbo boost? you will never go above 3.8 with turbo boost it was a clean 4.5Ghz !!!

Ps anyway now that the subject was cleard what else do you want bEngineering?
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July 26, 2012 8:31:07 PM

I'm still a bit lost about the model numbers?
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July 26, 2012 8:33:46 PM

3770K, you need a K series to overclock properly as non k will have a locked multiplier and if anyone claims you can OC as well from a locked multi they are talking *** you can OC slightly from a locked multi but hit a ceiling quickly.

I see no point in getting the 2700k yes sandy heats up less than ivy but ivy is slightly faster so i balances out. Unless you plan on real EXTREME OC's get the newer Ivybridge 3770K, finally if you do buy Sandybridge get the 2600K why buy 2700K for more when both are unlocked so paying for the extra 100mhz is kinda mad.

As to motherboard if you get the 3770K get a decent Z77 chipset board cant recommend anything as dont know your demands... will you need SLi in future? etc
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July 26, 2012 8:34:34 PM

And it says K - Unlocked (adjustable CPU ratio up to 57 bins)?
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Anonymous
July 26, 2012 8:34:56 PM

wr6133 said:
3770K, you need a K series to overclock properly as non k will have a locked multiplier and if anyone claims you can OC as well from a locked multi they are talking *** you can OC slightly from a locked multi but hit a ceiling quickly.

I see no point in getting the 2700k yes sandy heats up less than ivy but ivy is slightly faster so i balances out. Unless you plan on real EXTREME OC's get the newer Ivybridge 3770K, finally if you do buy Sandybridge get the 2600K why buy 2700K for more when both are unlocked so paying for the extra 100mhz is kinda mad.

As to motherboard if you get the 3770K get a decent Z77 chipset board cant recommend anything as dont know your demands... will you need SLi in future? etc


http://valid.canardpc.com/show_oc.php?id=2269861

ps tell me with x36 multiplier do you see it for locked and you....
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July 26, 2012 8:35:26 PM

How did the guy(s) overclock it?
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July 26, 2012 8:36:10 PM

It's because of this.

Quote:
Luckily for us, Sandy Bridge-E made some other changes that affect overclocking. While normal Sandy Bridge platforms use a bclk of 100MHz, the Sandy Bridge Extreme can use a bclk of 100MHz, 125MHz, 166MHz, or 250MHz. Just crunching the numbers, if that 4x the bclk ratio is in effect, then with the multiplier at 43, as it was for the single core turbo overclock with the 100MHz bclk, we are looking at a potential overclock of 5.375GHz with a bclk of 125MHz, 7.138GHz at a 166MHz bclk, and 10.75GHz at a 250MHz bclk. Obviously, pushing the bclk to 250MHz, or even 166MHz, is really out of the question. Even using the base clock as the multiplier at 3.6GHz, you're trying for a 5.9GHz overclock with the 166MHz bclk. But 125MHz bclk is right up our alley.


http://benchmarkreviews.com/index.php?option=com_conten...
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Anonymous
July 26, 2012 8:38:50 PM

anyway never mind now that we made fully clear 3820 is unlocked in LGA 2011 can we go forward?
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July 26, 2012 8:38:54 PM

So they disable the other cores to get a higher overclock?
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July 26, 2012 8:40:28 PM

Anonymous said:
The x36 link i gave was a fake ?


no as I said sorry i forgot SB-E didnt use the K moniker
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July 26, 2012 8:40:59 PM

On english websites the cheapest prices for the 2600k and the 2700k vary by £1 so i may aswell get the 2700k. Plus the ivy bridge is £25 extra so if theres not alot to choose between them surely i should go for the 2700k and save on cooling?!

I'm going to cross fire XFX ATI Radeon HD6950's i think.
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July 26, 2012 8:42:32 PM

jay_nar2012 said:
So they disable the other cores to get a higher overclock?


? Not sure what you're asking there. I was just saying that a 125Mhz BCLK is possible with a 3820.
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July 26, 2012 8:43:18 PM

well Ivybridge offers you newer features with the Z77 chipset. features that dont work wih SB on the Z77 things like PCIe 3.0 now right now these may not be a biggie but why when spending this much not get the newer things/features.
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Anonymous
July 26, 2012 8:43:42 PM

I say go for 3820 on LGA 2011 at list you will not need change motherboard again when the new 'wonder' chips of intel will come out in the end i remove the head spreader of any new model...
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July 26, 2012 8:44:28 PM

The 2700K will still perform good and much cooler than the ivy bridge.
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July 26, 2012 8:46:56 PM

so can i overclock the 3820 or not?! I thought i needed a better spec'd motherboard to use the 3820?
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Anonymous
July 26, 2012 8:48:26 PM

you can the one at list said sorry he was mistaken...

4.5 with turbo boost!!! I mean if I tell it to my friend someone did said that nobody will believe me.
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July 26, 2012 8:48:47 PM

Anonymous said:
you can the one at list said sorry he was mistaken...


Yea, thanks Giatrakis....

Still need to do a bit more research though..
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July 26, 2012 8:49:14 PM

bEngineering said:
so can i overclock the 3820 or not?! I thought i needed a better spec'd motherboard to use the 3820?


You can, but that's LGA 2011 and requires a much more expensive X79 board.

Seriously, go with a 2700K/3770K and a good Z77 board.

There's almost no reason to go with SB-E, despite what Giatrakis says.
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July 26, 2012 8:52:46 PM

You can overclock the 3820 but you need a socket 2011 motherboard. These cost alot. SB-E is meant for people needing seriously heavy duty workstations for anyone else its a waste of money, im guessing your workstation needs are not at the extreme end ofthe spectrum as you mention gaming grade GPU's. Buying SB-E for gaming and very mild workstation use is generally overkill its mostly done by those wanting to wave their "E-peen".
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July 26, 2012 9:01:10 PM

Just to settle this stupid argument, the 3820 is a partly unlocked processor.

http://www.anandtech.com/show/5276

Quote:
The second exception is any of the K or X-series SKUs. If your Sandy Bridge model number ends in a K or X, then the chip is fully unlocked and can be overclocked up to 5.7GHz using only clock multiplier adjustments.

The Core i7 3960X and 3930K fall into the latter category, which makes overclocking them a breeze. The 3820 on the other hand is partially unlocked, which means that we can run it at up to 4.3GHz using multiplier adjustments alone. Note that the 4.3GHz limit only applies to the 1-core active state, in the worst case scenario of all cores active with no room to turbo the highest operating frequency of the chip when overclocked would be 4.0GHz.


Read more at http://www.anandtech.com/show/5276#ist7i0HDKx8AXCUJ.99



If the OP wants to OC, it can be done on the 3820. However, it would be wiser and more beneficial to get a i-k CPU.
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July 28, 2012 9:06:57 AM

Nuke armed.
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!