difference between core i3 and core i5 Ivy Bridge

Discussion of all forms of processors, from AMD to Intel to VIA.

Moderators: Flying Fox, morphine

difference between core i3 and core i5 Ivy Bridge

Postposted on Mon Nov 26, 2012 5:08 pm

I just bought a new gaming rig and and I had to go on the cheap for much of it (as I had to squeeze new winter tires, new hockey equipment and house taxes) in there, so I went shopping on a budget (but splurging on a 7870 Ghz edition and SSD's as those I think would make the biggest difference to my budget gaming machine. I bought a:

core i3 3220 (3.3Ghz)
MSI G41 Z77 motherboard
Radeon 7870 Ghz edition
plus a bunch of other stuff not relevant to this question...

I figured the price difference between the core i3 ($109.99) and core i5 ($179.99) wasn't enough to justify the little bit of "turbo" the core i5 offers, but then I saw that apparantly the i3 only supports PCI 2.0 http://en.wikipedia.org/wiki/Ivy_Bridge_(microarchitecture)

Hold on a minute, that's a pretty big deal. Does this mean that my shiny new Z77 motherboard would only be running it's PCIe 16x in 2.0 mode? If so, would that have any impact on my 7870's ability to output graphics? I looked through TR's review of Ivy Bridge but they only tested i5/i7. I Haven't been able to find anything on the net to give me a solid answer, but I'm still looking.


If it will impact performance, I'll buy an i5, but I'd rather save the money...
Last edited by Sargent Duck on Mon Nov 26, 2012 5:13 pm, edited 1 time in total.
Venii, vidii, vicii
Wii came, Wii saw , Wii conquered
Sargent Duck
Grand Gerbil Poohbah
Silver subscriber
 
 
Posts: 3077
Joined: Thu Mar 13, 2003 8:05 pm
Location: In my secret cave that has bats

Re: difference between core i3 and core i5 Ivy Bridge

Postposted on Mon Nov 26, 2012 5:11 pm

cant speak to the pcie difference, but you got a dual core instead of a quad core. that's the chief difference.

dual core with HT vs quad core without

still 4 threads, but the i5 should have significantly better performance i think.
brute
Gerbil
 
Posts: 83
Joined: Tue Nov 24, 2009 3:26 pm

Re: difference between core i3 and core i5 Ivy Bridge

Postposted on Mon Nov 26, 2012 5:32 pm

In games, an i5 will be better than an i3, but only marginally. Your i3 will still outgame almost the entire AMD lineup. The only time an i3 has problems is in applications that can take advantage of more than 2 physical cores. (HT does help a little, but it's DEFINETLY not like having 4 physical cores) Things like video encoding, Adobe Creative Suite products, file compression, etc can significantly benefit from more cores if you're doing large files/projects. Since your build is focused on gaming, I doubt the time savings in these programs is worth the added cost.

Regarding PCIe 2.0 vs 3.0: Even a 7870 can't saturate 16 lanes of PCIe 2.0, so you're ok. The real benefit to PCIe 3.0 having twice the bandwidth right now is for the mobo manufacturers to split those higher speed lanes more ways without a tangible impact on performance. This means more bandwidth flexibility in today's high speed interfaces (ie Crossfire/SLI, USB3.0, Thunderbolt, etc).
Main: i5-3570K, ASRock Z77 Pro4-M, Asus GTX660 TOP, 120 GB Vertex 3 Max IOPS, 2 TB Samsung EcoGreen F4, 8GB 1600MHz G.Skill @1.25V, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Samsung SSHD, 8GB 1866MHz G.Skill, Hand-Built Wood Case
DPete27
Gerbil Jedi
Silver subscriber
 
 
Posts: 1732
Joined: Wed Jan 26, 2011 12:50 pm
Location: Madison, Wisconsin

Re: difference between core i3 and core i5 Ivy Bridge

Postposted on Mon Nov 26, 2012 5:35 pm

PCI 2.0 has enough bandwidth on the bus interface that no GPU or game out today is able to fully saturate it. You usually find a bottleneck in your system elsewhere first, so I wouldn't worry too much. This was much the same when AGP got various speed bumps - In the real world it made a non-discernible difference on gameplay.

IMO, you'll be able to overclock the GPU's memory a bit and it will you a 2-5 extra FPS. Maybe an additional 1-2 FPS bump if you overclock the core too, but it doesn't do nearly as much to the performance like the memory does - If your worried about performance. :wink:

*Edit: The [H] has a good review to back this up. Conclusion is that the small 2-5% performance variation is more to do with IB's per-core enhancements rather than the PCI interface type. In many cases there was no differnce at all.
Source: http://www.hardocp.com/article/2012/07/ ... _review/14

*Double Edit: DPete27 beat me to it!
#337 Gamer | Elite Gaming | Join the Fray
Mega Beast - AMD FX-9590 | Gigabyte 990FXA-UD5 | 16GB DDR3 | Tri-Fire R9 290X | Sandisk X300S 512GB
Mini Beast - Intel C2E QX9770 [4.2 Ghz] | Gigabyte X48T-DQ6 | 8GB DDR3 | GTX 750 Ti | Seagate 2TB HDD
geekl33tgamer
Gerbil Elite
Silver subscriber
 
 
Posts: 724
Joined: Tue Aug 25, 2009 7:25 pm
Location: United Kingdom

Re: difference between core i3 and core i5 Ivy Bridge

Postposted on Mon Nov 26, 2012 5:46 pm

Almost all cards run at maximum, or near-maximum throughput on an old PCIe 1.0 slot (x16) which means that you utterly, totally, definitely don't need a PCIe 3.0 slot

Even if you were to run your card at PCIe 2.0 x8 instead of x16, you'd still get 95% of the performance, and bear in mind that the numbers below are for more potent graphics cards than your 7870:

http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/23.html
Last edited by Chrispy_ on Mon Nov 26, 2012 5:47 pm, edited 1 time in total.
I hear rig lists are all the rage, and I <3 the rage! Workstation = Black tower thing; HTPC = Shhhh!; Laptop - AMAZING FOLDING PC!
Chrispy_
Minister of Gerbil Affairs
Gold subscriber
 
 
Posts: 2161
Joined: Fri Apr 09, 2004 3:49 pm

Re: difference between core i3 and core i5 Ivy Bridge

Postposted on Mon Nov 26, 2012 5:47 pm

Awesome guys, thanks for all the replies.

Yeah, I was thinking the difference between PCIe 3.0 and 2.0 was kinda like the AGP 8x/4x, but I wanted to make sure. I won't ever be doing video encoding, Adobe Creative Suite, file compression or anything like that.
Venii, vidii, vicii
Wii came, Wii saw , Wii conquered
Sargent Duck
Grand Gerbil Poohbah
Silver subscriber
 
 
Posts: 3077
Joined: Thu Mar 13, 2003 8:05 pm
Location: In my secret cave that has bats


Return to Processors

Who is online

Users browsing this forum: No registered users and 0 guests