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Thread: Best way to install CPU into LGA 775 socket




  1. #1
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    Default Best way to install CPU into LGA 775 socket

    What is the best way to install a CPU into a LGA 775 socket? I was EXTREMELY careful the other day, but still managed to somehow bend one of those very delicate pins in the socket. I was able to straighten it, but now I am paranoid and feel I need to remove the CPU and check if any pins are bent each time I install it now, which just becomes an endless cycle because when you put the CPU back in, you could just be bending a pin again, and on and on. Please give me some tips on how to lower the CPU most successfully into the socket without pin problems. Also, what about attaching a CPU fan? Should you screw it down tight or will that put too much pressure on the CPU and pins and cause bending/breaking? I have a Zalman 9700 that uses a bracket to attach to with a metal clamp that holds the heatsink to the CPU. Can this be attached too tight? Thanks for the help.
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  2. #2
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    Default Re: Best way to install CPU into LGA 775 socket

    I am not really sure how you can bend the pins. I am a total noob at building machines: built 3 so far, one 939, one 775, and one 1366, and havnt bend the cpu pins once... Just be extremely careful, line up the correct corners, and "drop" it in. I always hold the actual CPU chip by the edges.
    i7 920 D0
    Gigabyte UD4P Bios F9c



  3. #3
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    Default Re: Best way to install CPU into LGA 775 socket

    For the second part of your question, I wouldnt tighten the CPU screws too much, but they should be firm. Attaching the CPU cooler, in my opinion, is the hardest part of the whole build. Go through it nice and slow. Tighten the screws one turn at a time. Top left, bottom right, top right, bottom left. One turn at a time. Remember to apply the thermal paste :)
    i7 920 D0
    Gigabyte UD4P Bios F9c



  4. #4
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    Default Re: Best way to install CPU into LGA 775 socket

    I usually just hold the socket 775 cpu by the edge, and make sure the notches of the cpu is aligned with those on the socket of the mobo, and that cpu is parallel with the socket. Lower the cpu till it is just over the socket and then gently release it and it just drops right in. Let the weight of the cpu to enter the socket. No force is needed.

    Sorry I can't help you with the Zalman 9700 as I have not installed that hs before.

    May I ask how you installed the cpu? Just wondering how the pins got bent? You know it may not have been your fault as the pin may have already been bent before you installed it. Did you check the pins before installing?

    All the best.
    1) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @445x9@1.2625v bios, TRUE 120, Scythe UltraKaze 44cfm, 4x2gb GSkill 8500, Visiontek 3870, Corsair TX850, Antec 900, Win7-64 Home.
    2) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @500x8.5@1.2875v bios, TRUE 120, Schythe UltraKaze 44 cfm, 4x2gb Buffalo FireStyx 8500, XFX 5770, Corsair AX850, CM Scout, WinXP Pro/Win 7-64 Home.
    3) Gigabyte P55A-UD4P (rev 1.0, bios F5) i5 750 @190x20@1.30625v bios, CM Hyper 212+, 4x2gb G.Skill Ripjaw 1600, 7900GS, Corsair TX750, CM Scout, Win7 Pro-64.
    4) Asus P8Z68-V Pro (bios 0801), i5-2500K @44x100@1.248v cpuz, Megahalem rev.B, 4x4gb GSkill Sniper 1600, Corsair AX850, Antec 902, Corsair Performance 3 128GB, Win7-64 Home.


  5. #5
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    Default Re: Best way to install CPU into LGA 775 socket

    Man, I have no idea how the pin got bent. I was SO careful putting the CPU in. I had to take it out as part of debugging another problem, and right away I could see the bent pin. You know, when you do bend pins, you never really know unless an error condition makes you remove the CPU to check. I am pretty sure I checked the socket before inserting the CPU. That's something I would normally do, but maybe I neglected it this time and the socket was already damaged. I will ALWAYS be sure to check in the future though.
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  6. #6
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    Default Re: Best way to install CPU into LGA 775 socket

    I would think if a pin or some pins were bent, the cpu would not have slid into the socket by itself effortlessly and not sit flush with the socket. I also look at the cpu from the side after dropping the cpu into the socket to see if there are gaps between the cpu and the socket from at least 2 sides. I also give it an ever so gentle wiggle (no downward force) from side to side to make sure that the cpu is fully inserted into the socket before flipping the holding latch over and securing the lever down onto the cpu.

    Be that as it may, I hope it is all resolved and working out for you now my friend.

    All the best.
    1) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @445x9@1.2625v bios, TRUE 120, Scythe UltraKaze 44cfm, 4x2gb GSkill 8500, Visiontek 3870, Corsair TX850, Antec 900, Win7-64 Home.
    2) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @500x8.5@1.2875v bios, TRUE 120, Schythe UltraKaze 44 cfm, 4x2gb Buffalo FireStyx 8500, XFX 5770, Corsair AX850, CM Scout, WinXP Pro/Win 7-64 Home.
    3) Gigabyte P55A-UD4P (rev 1.0, bios F5) i5 750 @190x20@1.30625v bios, CM Hyper 212+, 4x2gb G.Skill Ripjaw 1600, 7900GS, Corsair TX750, CM Scout, Win7 Pro-64.
    4) Asus P8Z68-V Pro (bios 0801), i5-2500K @44x100@1.248v cpuz, Megahalem rev.B, 4x4gb GSkill Sniper 1600, Corsair AX850, Antec 902, Corsair Performance 3 128GB, Win7-64 Home.


  7. #7
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    Default Re: Best way to install CPU into LGA 775 socket

    Quote Originally Posted by BoombasticSloth View Post
    I would think if a pin or some pins were bent, the cpu would not have slid into the socket by itself effortlessly and not sit flush with the socket. I also look at the cpu from the side after dropping the cpu into the socket to see if there are gaps between the cpu and the socket from at least 2 sides. I also give it an ever so gentle wiggle (no downward force) from side to side to make sure that the cpu is fully inserted into the socket before flipping the holding latch over and securing the lever down onto the cpu.

    Be that as it may, I hope it is all resolved and working out for you now my friend.

    All the best.
    You are braver than I :D
    i7 920 D0
    Gigabyte UD4P Bios F9c



  8. #8
    kick's Avatar
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    Default Re: Best way to install CPU into LGA 775 socket

    Intel only guarantees a limited number of 775 insertions.
    Id have to look it up but its like 30.
    I havent taken my cpu out in about 9 months or so but when I had it new ,I did a lot ,testing paste application+ also pad mods with insulating tape.
    The pins dont center on all the pads exactly in the middle(from little dents in the tape).
    Drop yer cpu in:
    If it doesnt look exactly centred give it a little nudge sideways with something like a broken matchstick (break enough of them and you will get one that splits diagonally along the shaft).Just give it a light little flick and dont press down.

    If the cpu looks centred move the locking plate down gently and see if it is centred on the cpu..If it looks a lot closer to one side than the other ,lift it a little and move it(on the free play in the hinge).
    When its centred lock it down with the lever.

    With a bent pin you were lucky to get it straight again without putting a small s bend in the pin,which would make it shorter.
    Id put it back in or leave it clamped as it is if its working ok now.Putting on a heatsink shouldnt alter anything unless you go overboard on the tightening.
    Once the hs is on and flat and the 4 mounting screws/bolts/nuts are barely tight:
    Gradually tighten the hs in the recommended way.
    Thats usually a diagonal sequence 1-3-4-2 with the nuts/screws being numbered 1,2,3 and 4 in a clockwise rotation from top left .
    Ie nut 1 is top left ,nut 2 is top right ,nut 3 is bottom right and nut 4 is bottom left.
    Last edited by kick; 08-29-2009 at 06:15 PM.
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  9. #9
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    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Best way to install CPU into LGA 775 socket

    I hold them by the edge of either the PCB or the heatspreader and lower them in, no dropping or releasing here

  10. #10
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    Default Re: Best way to install CPU into LGA 775 socket

    OK, looks like I've got it in OK this time, I hope anyway. They need to make the CPU clear so you can see if you've got bent pins. :) Thanks for the help.
    Antec Nine Hundred ATX Mid Tower Computer Case
    GIGABYTE GA-EP45-UD3P Intel P45 ATX Intel Motherboard v1.6 BIOS FB
    EVGA GeForce GTX 275 PCI Express Video Card
    PC Power & Cooling S75QB 750W ATX12V Power Supply
    Intel Core 2 Quad Q9650 3.0GHz
    OCZ Reaper HPC Edition 4GB (2 x 2GB) SDRAM DDR2 800 (PC2 6400) Kit Desktop Memory
    Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s
    HP 22X DVD Burner SATA Model 1170i
    AuzenTech AZT-FORTE X-Fi Forte 7.1 PCI Express Sound Card
    ZALMAN CNPS 9700 NT
    Windows Vista Home Premium 64 bit

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