An update on LGA-775

When Intel first launched the LGA-775 socket we were skeptical; reports of extremely high failure rates of initial sockets were pouring out of Taiwan and we had feared the worst: had Intel finally broken all ties with the enthusiast community by implementing a socket that would fail after a couple of insertions? 

Now, 5 months after the public introduction of LGA-775, we can say that our deepest fears didn’t end up materializing.  We’ve done a tremendous number of LGA-775 CPU installations over the past several months across various motherboards and have yet to encounter a system that will no longer POST or even a single bent pin on the motherboard. 

Click to enlarge

We do have complaints about Intel’s retail heatsink/fan and its mounting mechanism.  While we were originally quite impressed with how much easier the LGA-775 HSF mounted than the older Socket-478 units, the more we used them, the more we began to despise them just as much as we did the previous model. 

The problem with the new heatsink is that it is very easy to not get all of the four pegs to lock into place properly, which usually results in a clock throttling CPU that’s difficult to detect.  The issue seems to be much more common on the higher speed Prescotts (3.6GHz and 3.8GHz); the first time you mount the heatsink it’s usually not a problem, but remove it and reinstall it a few times and now things aren’t quite as perfect.  The pegs don’t always lock into place securely and we’ve had cases where one of the pegs will pop out of place.  Usually if you spend more time with it and apply a good amount of pressure to the culprit pegs you’ll avoid any issues.  It’s not an unsurmountable problem but it’s definitely an annoyance we’ve had since the launch of the LGA-775 socket. 

We much prefer AMD’s simple, single lever approach to heatsink installation as it is effortless and we’ve never had an issue with an improperly cooled CPU.  To Intel’s credit, the Pentium 4 does produce significantly more heat than the Athlon 64 so maintaining better contact between the heatsink and the CPU is much more important to Intel than AMD, but that doesn’t change the fact that Intel’s heatsink can be a pain to install and reinstall. 

The worries of users bending pins in the socket and returning their motherboards also doesn’t seem to be a real issue as we haven’t heard any complaints from the Taiwanese motherboard manufacturers. 

Testing EDB Functionality AMD Athlon 64 4000+ and Intel Pentium 4 570J: Head to Head


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  • Dustswirl - Sunday, November 14, 2004 - link

    Aha! Thx guys!
  • michaelpatrick33 - Sunday, November 14, 2004 - link

    I meant #8 not #6 for the above post sorry Reply
  • michaelpatrick33 - Sunday, November 14, 2004 - link

    #6 You are right probably since they didn't mention 754 and that would give more parameters for the test. Good catch. They simply downclocked the 130nm 939 3500+. Reply
  • Glassmaster - Sunday, November 14, 2004 - link

    #6: I'm pretty sure they downclocked a 130nm 939 3500+ for those measurements.

  • Dustswirl - Sunday, November 14, 2004 - link

    "[...]We also included power consumption figures from 130nm Socket-939 Athlon 64 3200+ and 3000+ chips, which as you may know, do not exist.[...]"

    Mea culpa...
  • Dustswirl - Sunday, November 14, 2004 - link

    Hmmmm so 2CH isn't like dual channel or? coz afaik 754 is single channel!
    Thx for the info :)
  • michaelpatrick33 - Sunday, November 14, 2004 - link

    #4. They are using the 754 130nm core 3000+. That is why they say 90nm beside the 3500+ and not any of the other AMD64's Reply
  • Dustswirl - Sunday, November 14, 2004 - link

    I don't understand how the A64 3500 90nm consumes less power then the A64 3000 (512/2CH) that is supposed to be also a 90nm part... Reply
  • michaelpatrick33 - Sunday, November 14, 2004 - link

    The power consumption at load is a tad high for the 3.8 at being nearly twice as high as the 3500+. 226 vs. 114. That trend is obviously why Intel killed the 4.0 and beyond and the Tejas I would imagine. I wonder how much the 600 series chips from Intel will be with the extremely expensive L2 cache vs the current 3.6 and 3.8 chips. Reply
  • AtaStrumf - Sunday, November 14, 2004 - link

    I've probably said this before, but I really like those tables with % numbers. You might wonna switch everything over to it. It gives a much more precise picture of diffence than those graphs. Reply

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