i5-3570k or i7-3770k?

[cadaveca]

Down the rabbit hole. The specs for the chips (in this case the 3570k) list 3.4Ghz/3.8Ghz Turbo. So when you change the multiplier for an OC, I assume there's some point when you have to cut out the power saver & turbo boost mode for the OC to be stable. I suspect it's motherboard/bios dependant?

Yes/no. All boards offer power-saving disabling and regular multi-clocking.



It is best, however, to clock using Turbo itself, like the CPU does at stock.


Some boards, when XMP is enabled, run all cores at the max turbo multi. Some do not. Most gamer-oriented and OC boards do though, no matter the brand.


I recommend overclocking using Turbo.

Don't forget, the game has changed considerably, and Intel will warranty overclocking, too. For a small cost($25 or so), Intel will replace your chip once, even if you give it 5000V. No questions asked.

http://click.intel.com/tuningplan/

So what we are saying is this: Go ahead and push it, we've got your back.

I hate to push marketing on you guys, but to me, this is worth it. Clock that chip up, pay the small cost, and don't worry about anything.

 

[drdeathx]

Down the rabbit hole. The specs for the chips (in this case the 3570k) list 3.4Ghz/3.8Ghz Turbo. So when you change the multiplier for an OC, I assume there's some point when you have to cut out the power saver & turbo boost mode for the OC to be stable. I suspect it's motherboard/bios dependant?

With both SandyBridge and IvyBridge, you need to keep turbo enabled to overclock.

 

[erocker]

I thought they would overclock the same but Kingston told me the IMC is better on 3770K.

I can't fathom how Kingston would know the strength of an IMC on a chip by chip basis.

 

[Vlada011]

My voice go for 3770k. I love i7. 3570k is good for gaming if you change more often configuration but you never know when you need i7 for longer time.
My 3700k OC similar like i7 SB. Only is hotter. 4.8GHz Linx 1.275V, Prime95 1.300V 12h Blend with 90-92% RAM.
I didn't count 5.0GHz like some minus for IB, because that is more for i5 clock.

 

[Sasqui]

All power-saving features and turbo are enabled. This is just how the new chips work. If you use a non-standard multi it cuts the turbo to one core only. I've pushed the chip to 4.5Ghz without much issue, but I don't see the benefit in my encoding apps for the heat difference made under load.

What would a non-standard multiplier be?

 

[drdeathx]

I can't fathom how Kingston would know the strength of an IMC on a chip by chip basis.

pretty simple, they test their memory on all Ivybridge chips

It is Not a chip per chip basis. IMC is different on both.

 

[Binge]

pretty simple, they test their memory on all Ivybridge chips

It is Not a chip per chip basis. IMC is different on both.

That is false sir. IMC is the same. 3570k is just a 3770k with HT disabled. My source? Intel.

 

[Sasqui]

That is false sir. IMC is the same. 3570k is just a 3770k with HT disabled. My source? Intel.

And 2MB of cache disabled.

....
I bought 2x of this memory: G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-17000CL9D-8GBSR

Capacity 8GB (2 x 4GB)
Speed DDR3 2133 (PC3 17000)
Cas Latency 9
Timing 9-11-10-28
Voltage 1.65V

G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 S...

 

[Binge]

And 2MB of cache disabled.

....
I bought 2x of this memory: G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-17000CL9D-8GBSR

Capacity 8GB (2 x 4GB)
Speed DDR3 2133 (PC3 17000)
Cas Latency 9
Timing 9-11-10-28
Voltage 1.65V

G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 S...

this is a good read

http://www.anandtech.com/show/6372/...333-to-ddr32400-on-ivy-bridge-igp-with-gskill

 

[Sasqui]

this is a good read

http://www.anandtech.com/show/6372/...333-to-ddr32400-on-ivy-bridge-igp-with-gskill

It really is surprising how the timings make much more of a difference on DDR3, the CL9 2133 is pretty damn close to CL10 2400.

No reviews of that Sniper memory I have, it's all the older ans slower versions.

 

[Binge]

The principal still applies, and thankfully you'll be able to use this knowledge to an advantage in your own overclocking

 

[Sasqui]

With both SandyBridge and IvyBridge, you need to keep turbo enabled to overclock.

Missed that comment before... if you disable it, you can't change the multiplier?

 

[BarbaricSoul]

With both SandyBridge and IvyBridge, you need to keep turbo enabled to overclock.

Missed that comment before... if you disable it, you can't change the multiplier?

False, I have no problems with changing my multi with turbo-mode disabled. System specs for details(Barb's Domain)

 

[qubit]

I'm upgrading my main rig to Ivy Bridge this winter. I've already bought bought 16GB of DDR3 ram, and have nothing to put it in

Next up, the CPU:

i7-3770k @ $330 (Newegg)
i5-3750k @ $190 Here: http://www.techpowerup.com/forums/showthread.php?t=173973

Difference of about $140 - Help, I can't decide!
After that, need to choose a MB.

I'll be running AutoCAD Civil3D/Map 2013 with some large datasets, some video and photo editing (fairly lightweight), and a moderate amount of gaming.

As you like to overclock, I would get the previous 2700K instead, like I have. As you know, Ivy Bridge runs around 20C hotter when overclocked due to the inferior IHS. The IPC improvements are only around 5%, so the better overclock would more than make up for it with the 2700K. Also, I assume you won't be using the iGPU, making the improved version redundant.

If you still want to go IB, then get the 3770K, no question. Yes, it's more expensive, but you do get a better chip with HT and heck, why does an enthusiast need a reason for getting the better part!

My 2700K is running at 4.7GHz, because it's the sweet spot for heat, power, noise and CPU lifetime for me. However, it does go well over 5K even on air, if you're into hardcore overclocking. That will be difficult with IB, due to all that heat, likely forcing you to use water.

 

[drdeathx]

That is false sir. IMC is the same. 3570k is just a 3770k with HT disabled. My source? Intel.

No comment on 2Mb of disabled cache?

 

[BarbaricSoul]

No comment on 2Mb of disabled cache?

No comment about the turbo-mode/multi statement?

 

[drdeathx]

No comment about the turbo-mode/multi statement?

I will rephrase. You do not have to disable turbo. I think your smart enough to get that.

 

[BarbaricSoul]

It is true about not having to disable turbo to OC, but that's not what you said.

You need to keep turbo enabled to overclock

is in no way a correct statement.


Let me retrack my last statement. By Qubit's post after this one, it appears that you may have to have turbo enabled on some boards, but not all of them.

 

[qubit]

I can't overclock the CPU without enabling turbo. Is it different on an Ivy Bridge CPU?

 

[BarbaricSoul]

I can't overclock the CPU without enabling turbo. Is it different on an Ivy Bridge CPU?

You can't? I can OC in bios or in the MSI Control Center on my desktop and I have turbo-mode disabled. I actually went and disabled it after I first read DrDeath's statement about turbo needing to be enabled to OC. I disabled it and set my multi to 40 in bios to see if I could, and I could. I then changed my voltage in MSI CC with no problems. Maybe it depends on the MB's vendor.

 

[qubit]

You can't? I can OC in bios or in the MSI Control Center on my desktop and I have turbo-mode disabled. I actually went and disabled it after I first read DrDeath's statement about turbo needing to be enabled to OC. I disabled it and set my multi to 40 in bios to see if I could, and I could. I then changed my voltage in MSI CC with no problems. Maybe it depends on the MB's vendor.

That's really strange. I remember reading in reviews that turbo needs to be enabled for this, so the behaviour I see is consistent with that and is a design feature of the CPU. You can underclock it with turbo off though. I've only ever overclocked it through the bios, too.

I have no idea why yours should be different.

 

[FreedomEclipse]

Its more about fine tuning the turbo and making it turbo harder. you could disable it of course, but better it turbo when it really needs to rather then be running at full turbo even in mundane tasks such as browsing the internet or just listening to music.

 

[cookiemonster]

Hi just upgraded to this and i am very happy, I have not tried overclocking yet as i am waiting for Intel Performance Tuning Protection Plan to arrive.

Intel Core i5 3570K,1155, Ivy Bridge, Quad Core, 3.4GHz,
Gigabyte GA-Z77X-UP5 TH Socket 1155 VGA DVI HDMI Dual Thunderbolt 7.1 Channel Audio ATX Motherboard
16GB (2x8GB) Corsair DDR3 Vengeance (1600mhz)
256GB Crucial RealSSD M4, 2.5" SATA

 

[BarbaricSoul]

Its more about fine tuning the turbo and making it turbo harder. you could disable it of course, but better it turbo when it really needs to rather then be running at full turbo even in mundane tasks such as browsing the internet or just listening to music.

Don't matter with my rig considering it's always running at full load crunching. Gaming is actually a break/rest for my 2600k rig.

 

[FreedomEclipse]

I have not tried overclocking yet as i am waiting for Intel Performance Tuning Protection Plan to arrive.

Im surprised that you thought you needed to pay for something like that.

Id really only consider it if I was going for an EXTREME OC.

going from 3.8Ghz to 4.6Ghz is well within the safety zone of the 3570k. Most people here even run their SB CPUs at that same speed.

I Like my 4.9Ghz though.