Intel Core i5 750 Review - Overclocking Phase-Change vs LN2

CPU by massman @ 2009-09-13

Intel´s latest CPU is put to the test against their own Core 2/Quad and Core i7 series, as well as AMD´s Phenom II. We wrap up the testing with an overclocking session using phase-change and LN2 Cooling. Does the Core i5 and S1156 i7 impress? Let us find out

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Pricing, evaluation and conclusive thoughts

Pricing

This section I always find the most difficult one to comment on, because the price-argument is all too often used in an incorrect manner. First of all, discussing prices of high-end products is pointless: if you want the ultimate performance, money simply shouldn't be an issue. However, for most people, including myself, price does matter. The most common situation is where a buyer has a certain price range and wants to find the most performance for that money. That's why we lined up the following comparison, based on the prices on Geizhals.eu. We looked up the current price for the new 1156 products and tried to find a 775, 1366 and AM3 cpu alternative pretty much equal to the price of the 1156 processor. Next to that, we also listed the cheapest motherboard available for that CPU (note: for 775 we chose a P45/DDR3 platform!) and the 10th cheapest motherboard to indicate the scaling of the prices. Let's have a look.

Madshrimps (c)


As for the CPU's, it seems that the LGA1156-based products are very well-priced: for the money you spend on an LGA1156 product, you can get an LGA775 at pretty much the same clock frequency, an 1366 at pretty much the same clock frequency and an AM3 a bit higher clocked. The beauty of this is that:

- LGA775 is clock-per-clock slower
- The turbo-mode on LGA1156 is SO extensive (upto 6x133 more!) that it surpasses the AM3 in clockspeed ánd closes the gap with the equally priced LGA1366 product.

Looking at the motherboard prices, it's become very clear that the LGA1156 platform is more than just a performance boost. The LGA1366 is too pricy and the LGA1156 is actually not that expensive!

Evaluation

Unlike what mostly happens when I have to formulate an opinion about newly released technology, as quite often it requires a series of well-balanced arguments, I can be quite short about the Core i5: clock-per-clock it's faster than the Core 2 Quad series, but a bit more expensive and it's cheaper than Core i7, but thanks to the excellent Turbo Mode not that much slower. In other words, the Core i5 750 and i7 860, which are both well-priced products, are worth to consider if you are planning an upgrade as with a little bit of tuning and price-watching you can get a configuration that is as cheap as Core 2 Quad but performs equal to a Core i7. The Core i7 870, on the other hand, is priced outside the reach for most mainstream purposes.

Many people had hoped last year that the Core i7 would replace Core 2, stating that Intel is making a big error by releasing yet another product range on the market, but I'm strongly convinced that AMD with its Phenom II platform has taken the biggest hit here. Before the Core i5, when there was a significant price difference between Core i7 and Core 2 Quad, the purchase of the Phenom II platform could be justified by looking at the price/performance ratio, but as the Core i5 is a lot more performant than the Core 2 Quad ánd a lot cheaper than the Core i7 I would actually recommend a Core i5 platform over a Phenom II. Note that I don't state that Phenom II is a bad product, not at all, but current price/performance rating not favoring it.

Intel Core i5 750 recommended for

Madshrimps (c)


As for the two P55-based motherboards used in this review I would like to refer you to the upcoming motherboard round-up. On the last moment we received Gigabyte's UD6 sample so we thought it would be best to compare both the UD3 and GD80 to another board in one article. Maybe I can just say that both motherboards did what they had to do and both are a good choice.

Conclusive thoughts

To end with, I'd like to say that there are still a couple of subjects left to be dealt with when talking about Core i5; for instance the power consumption and the in-game performance difference. We'll be seeing a lot of new LGA1156-based products in the near future as well as some crazy memory overclocks (which I haven't discussed in this article either), but I prefer to take my time to investigate and post my findings in different articles. Oh, for power consumption numbers I would really like to refer to the article posted on LostCircuits.com as I found their test methodology and the conclusions based on the data are one of the more correct and, maybe, better I've seen so far. Link: Intel's Lynnfield: More Than a CPU .

To end with, I would like the following people for providing the necessary hardware for this article:

  • Manu from Tones for providing the Core i7 965 and Core 2 Quad 9550
  • Eric and Leona from MSI for providing the Core i5 750, Core i7 850 and MSI P55-GD80
  • Steeve from AMD for providing the AMD Phenom II X4 965
  • Ron from Coolermaster for providing the LGA1156 bracket for the V8
  • Tobias from OCZ Technology for providing the OCZ Freeze cooling paste
  • Bernice and Sibren from Gigabyte for providing the P55-UD3, the M745GT-UD3H and the EP45T-UD3LR
  • Jason Shek for the ANS-9010 from Acard Technology

    And of course the entire Madshrimps team for giving me the time to finish this article, even though I didn't make NDA, and the support during the testing. And, of course, you readers for still finding to motivation to read the one millionth review of the Core i5!

    'Till the next time!




    Madshrimps (c)



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    Comment from Massman @ 2009/09/13
    As said: a lot more to digg into. Expect more overclocking action, more motherboards, more turbo mode testing, more memory testing ...

    Much more
    Comment from Diegis0n @ 2009/09/14
    Great work PJ!

    It makes me count my money and try to get a i5 platform

    UD3 + 750: 277€, surprisingly affordable since i can sell C2 combo out for ~200.

    I'll be ready for some action in a few months btw, lots of hardware will become "available"
    Comment from Kougar @ 2009/09/14
    Nice article... Looks like Turbo Mode will make subzero OC'ing rather interesting...

    Quote:
    just think about the secrecy with which AMD developed its new HD58xx series: so close to the launch and publicly no one has a real clue about its performance.
    Spoke too soon. Still, is a very valid point. The entire NDA situation with Lynnfield is not just absurd, it is plain stupid.
    Comment from thorgal @ 2009/09/15
    Seems you woke up someone at Anandtech LOL. One day after your article they present a clock comparison themselves
    Comment from Diegis0n @ 2009/09/15
    I well prefer PJ's writing skills; at least there's some nice pictures to look at
    Comment from bartx @ 2009/09/16
    Nice work. I like reviews from [M]

     

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