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Phenom II x4 Vs. Intel i5 2300

post #1 of 14
Thread Starter 
I'm in the middle of getting the money together for my next build, and while I won't go into everything here, I'm looking for a crossfire capable (mATX) motherboard. As such, there is really only one motherboard on each platform available. Due to costs, I'm looking at getting a Phenom II x4 955 (BE).

While it would cost more, it's not completely out of my budget to go for an Intel i5 2300, however as my understanding is that it cannot be overclocked very much and is therefore limited to its stock speed, would an overclocked Phenom II x4 (say to 4 Ghz - which ought to be achievable) be more desirable, or at least, highly competitive with, the newer Sandy Bridge processor at stock speeds?


The 2500K is out of my budget, largely due to the increase in motherboard prices on 1155 socket, so please don't suggest it as an alternative.


(Also, while I've tentatively decided against a 1055T, you could persuade me into one instead of the 955, if you think it's a viable alternative).

Basically, motherboards being equal, which one would you go for, if you try and take price into account.
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post #2 of 14
when you say the can't be overclocked very much, noooooo they can't be overclock AT ALL.
the SB chips have to be unlocked in order to be overclocked, any baseclock change will kill the boards.

the 955 is a very good chip, and when compared overclocked to a stock SB chip it should win.
post #3 of 14
If you're planning to build this after April, look at Bulldozer.
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post #4 of 14
Quote:
Originally Posted by thrasherht;11996311 
when you say the can't be overclocked very much, noooooo they can't be overclock AT ALL.
the SB chips have to be unlocked in order to be overclocked, any baseclock change will kill the boards.

the 955 is a very good chip, and when compared overclocked to a stock SB chip it should win.
This isn't true - you might be able to overclock it by about 100-200MHz (probably much closer to 100).

Out of those two, I'd go with the Phenom. If you had the cash for a 2500K that would win hands down, but an overclocked 955 should beat the 2300 in most things.
post #5 of 14
The sandybridge will win quite easily I think, being a much superior architecture.

and I'm sure you can overclock those a bit? I read 4-8 speed bin overclocks.

Also with turbo it will auto overclock a bit anyway.
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post #6 of 14
Thread Starter 
Quote:
Originally Posted by thrasherht;11996311 
when you say the can't be overclocked very much, noooooo they can't be overclock AT ALL.
the SB chips have to be unlocked in order to be overclocked, any baseclock change will kill the boards.

the 955 is a very good chip, and when compared overclocked to a stock SB chip it should win.

Thanks. What little I'd read was a few days ago, saying that you could adjust the base clock from 100 to about 104, but that's still effectively no overclock.
Quote:
Originally Posted by HybridCore;11996323 
If you're planning to build this after April, look at Bulldozer.

Thanks, but I'd rather get a computer up and running now than wait another three months. I waited until now (instead of buying in December) to see what SB brought to the table, but since the 2500k is out of my build's price range without compromising on graphics card, I'm still leaning towards the AMD chips.

Does anyone have any comparable stats regarding overclocked Phenoms compared to one of the newer i5's that is at stock speeds? I've not seen much comparing AMD to the new Intel chips - largely what I've seen has been either the Phenom II x6's or the older Intel chips.
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post #7 of 14
The non-K can Overclock
Quote:
What's this? The good news is that the rumors of Intel killing overclocking for non-K Sandy Bridge processors were slightly exaggerated! If you've got a CPU with Turbo Boost functionality it can be overclocked!! The bad news is that it's pretty limited. Our Core i5 2400 is rated at 3.1GHz with a typical Turbo speed of 3.2GHz with four active cores, with an absolute maximum of 3.4GHz under a single core load. By changing the Turbo multipliers to the maximum allowed either in the BIOS or the Intel Extreme Tuning Utility and raising the power consumption limits to 135W we were able to get the Core i5 2400 to run at a solid and steady 3.6GHz with a full 4 core load. 2 and 3 core loads are allowed to run at 3.7GHz and under single core loads Turbo was allowed up to 3.8GHz. These are noticeable increases in speed and only added about 15w of additional power use. It was on default voltage as well.

Source
post #8 of 14
Thread Starter 
Quote:
Originally Posted by 8-Ball;11996445 
The non-K can Overclock


Source

+rep for the find.

As I'm looking at the 2300 and not the 2400, my assumption would be that it'd run at 0.3 Ghz slower and so the max of 3.6 Ghz would actually peak at 3.3.

In that case we're looking at comparing an Intel 2500 (running without turbo) to an overclocked Phenom II x4, or something far more along the lines of the 2400 with turbo.


A 2300 overclocked then would place roughly between the two.

This suggests that a Phenom II running at 3.8 Ghz + would be better.

Can anyone find any better links?
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post #9 of 14
AnandTech: Starcraft 2
http://www.anandtech.com/bench/CPU/129

AnandTech: Core i5-2500K vs Phenom II X4 970 BE
http://www.anandtech.com/bench/Product/288?vs=186

LegitReviews: Starcraft 2
http://www.legitreviews.com/article/1501/21/
Quote:
Originally Posted by rui-no-onna;11972692 
Made a chart of frequencies (in GHz) of the currently released Sandy Bridge processors. Might be useful info for some particularly those who don't plan on pushing their overclocks to the limit.
Code:
CPU       Stock           Turbo         |   OC + Turbo (P67 only)
                    4c   3c   2c   1c   |    4c   3c   2c   1c
                                        |
i5-2300    2.8      2.9  3.0  3.0  3.1  |    3.3  3.4  3.4  3.5
                                        |
i5-2400    3.1      3.2  3.3  3.3  3.4  |    3.6  3.7  3.7  3.8
                                        |
i5-2500    3.3      3.4  3.5  3.6  3.7  |    3.8  3.9  4.0  4.1
                                        |
i5-2500K   3.3      3.4  3.5  3.6  3.7  |    5.7  5.7  5.7  5.7
                                        |
i7-2600    3.4      3.5  3.6  3.7  3.8  |    3.9  4.0  4.1  4.2
                                        |
i7-2600K   3.4      3.5  3.6  3.7  3.8  |    5.7  5.7  5.7  5.7

Needless to say, the 5.7 on K CPU's are just theoretical maximums.

Edited by rui-no-onna - 1/13/11 at 5:36pm
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post #10 of 14
Quote:
Originally Posted by rui-no-onna;12001807 
AnandTech: Starcraft 2
http://www.anandtech.com/bench/CPU/129

AnandTech: Core i5-2500K vs Phenom II X4 970 BE
http://www.anandtech.com/bench/Product/288?vs=186

LegitReviews: Starcraft 2
http://www.legitreviews.com/article/1501/21/

Just eyeballing the charts, it looks like the 2300 would be faster than an OC'd 955, but not enough to make a huge difference.

In that case, I'd look at the cost of the motherboards and what features they offer.
Edited by Drenlin - 1/13/11 at 5:33pm
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