Advertisement
Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.
Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

Lapping CPU with Sand Paper 600 and thinner ?

2»

Comments

  • #32
    BabyEater
    Registered Users, Registered Users 2 Posts: 700 ✭✭✭BabyEater


    I wouldn't have thought steel would be a good surface for lapping as i work in a steel fabrication shop and steel is never flat it is usually curved in or out slightly. Unless that is bar stock for milling which would have finner tolerances than the stuff we use.
    A good lapping surface is glass as it is nice and flat.


  • #33
    uteotw
    Registered Users, Registered Users 2 Posts: 192 ✭✭uteotw


    I plan to use a mirror with the sandpaper... I'll see what finish I get with the 1200 and if I need to do what Sir Random did or not with the piece of metal or not as I cannot find thinner than 1200.

    Today I've installed the Thermalright SP-94 and the Panaflo 92mm fan and measure temps.

    Machine Spec:
    Soltek Qbic 3401
    Intel P4 3.0ghz 800FSB
    Mushkin 2 x 512MB DDR400 RAM
    Radeon 9700 128MB
    Maxtor 2 x 160GB S-ATA
    Pioneer 107 DVD-RW
    Lite-On 40125s CD-RW

    So, it's small, powerful, it's cramed... just 1 PCI slot left available... might put a cheap pinnacle TV tuner/capture card.

    CPU Temps with Stock Intel HSF and thermal pad.
    BIOS Idle : Case = 44c CPU = 53c
    MBM5 Idle : Case = 41c CPU = 48c
    MBM5 Load: Case = 54c CPU = 68c

    CPU Temps with Thermalright Heatsink + Panaflo 92mm fan + ArticSilver3 paste
    The fan is sucking the air away instead of blowing on the heatsink.
    BIOS Idle : Case = 35c CPU = 45c
    MBM5 Idle : Case = 35c CPU = 42c
    MBM5 Load: Case = 45c CPU = 55c

    I'm pretty happy with these new temps... I'll see if I get some improvement after lapping the CPU.


  • #34
    Sir Random
    Registered Users, Registered Users 2 Posts: 771 ✭✭✭Sir Random


    Big improvement, but a 10c rise in your case temps under load indicates that you may need better airflow through the case. It seems like the heat isn't escaping the case, which will limit the SP-94s performance (cpu idle should really be low 30s). Is the 1st PCI slot free? It can help if your gfx card has room to breathe, and the slot below is open.


  • #35
    uteotw
    Registered Users, Registered Users 2 Posts: 192 ✭✭uteotw


    The Soltek 3401 is a Small Form Factor case. It only has 1 PCI slot and 1 AGP slot and with 2 hdd and 2 optical drives the airflow is pretty limitited. But it's still one of the best design around.

    SFFTech Review

    It has air intakes at the bottom, on the sides but over all it's pretty limited. Then their is a dedicated hot air extractor + the PSU fan also extracts the air from the case. I'll post pictures so show how packed the wholthing is.

    My Load tests involved reading a DV AVI from one disk, compressing to MPEG2, and writing the resulting file to the other HDD. So not only the CPU heats up but the HDD as well... overall I'm really pleased with the new temps.

    Here is the forum post that lead me to by the the cooling gear.


Advertisement
Advertisement