Page 1 of 2 12 LastLast
Results 1 to 16 of 32

Thread: Alright... Overclocking an A64.. Where do I start...?!?!? Dizzy....

  1. #1
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish

    Alright... Overclocking an A64.. Where do I start...?!?!? Dizzy....

    Hey guys, I've just got my rig up and running.. My hands are getting a little restless and I'm thinking of feeding it with some OC on my new rig..

    I was wondering if anyone had experience with using ABIT AV8 3rd Eye? My system specs are as my signature below...

    I'm familiar with OCing an XP.. but 64?? ........ dizzy... read another thread on OC a san deigo... got more dizzy.

    I was wondering how u guys actually get the CPU clock... HTT... front side bus... or sth in that effect to such huge values (250++MHz) and not rip ur DDR400 RAMs apart? I mean.. doesnt HTT indirectly determines how fast ur RAM run as well? I have a max RAM voltage of 2.8v... My ram is a Corsair TwinX PC3200C2PT and its running on SPD speeds of 2.5-3-3-6.... the board currently runs 204 Mhz... havent flashed a new version of bios... its still stock revision bios.

    Help... anyone?.... drowning...
    Me want Ultrabook


  2. #2
    Now with added sobriety Rave's Avatar
    Join Date
    Jul 2003
    Location
    SE London
    Posts
    9,948
    Thanks
    501
    Thanked
    399 times in 255 posts
    You can up the HTT without over stressing the RAM by running the RAM at a lower multiplier. While you're finding the processor's limits, set the RAM to DDR266 in the bios, that way you can find out the processor's maximum speed with the RAM still running well within it's limits.

    Then when you've done that you can find the board's maximum HTT limit by reducing the processor's multiplier- then you can max out the RAM to see what it's capable of. Finally you can work out a setting that's close to optimal for all of them. Like I say though, set it to DDR266 and start winding the processor up first, then post back.

  3. #3
    Resident abit mourner BUFF's Avatar
    Join Date
    Jul 2003
    Location
    Sunny Glasgow
    Posts
    8,067
    Thanks
    7
    Thanked
    181 times in 171 posts
    Don't forget to set your AGP/PCI locks to fixed & if you get to 260-270 on a K8T800 Pro chipset you are doing fine.
    & you will probably need to drop the LDT multi to 3 or 4.

    MSI P55-GD80, i5 750
    abit A-S78H, Phenom 9750,

    My HEXUS.trust abit forums

  4. #4
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    LDT multi? u mean HT multiplier?... and yea? whats all the HT multiplier about? I saw reviews in Anandtech that had to pull HT multiplier down to 800MHz before they cud rev HTT up to 285MHz on 9x multiplier..... anyone mind explaining?
    Me want Ultrabook


  5. #5
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    Rave, I'll try o rev it up my processor along the weekend... will post back next week when I get back to the office.. cheers mate... still waiting for replies on HT multiplier..
    Me want Ultrabook


  6. #6
    Resident abit mourner BUFF's Avatar
    Join Date
    Jul 2003
    Location
    Sunny Glasgow
    Posts
    8,067
    Thanks
    7
    Thanked
    181 times in 171 posts
    The LDT multi is the multiplier for the HyperTransport bus.
    LDTx reference clock = HyperTransport bandwidth
    You want to keep HT bandwidth under 1000MHz for stability (default ref. clock is 200) so if you want to run over 200HTT you need to drop to 4 or 3.

    MSI P55-GD80, i5 750
    abit A-S78H, Phenom 9750,

    My HEXUS.trust abit forums

  7. #7
    Banned StormPC's Avatar
    Join Date
    Sep 2004
    Posts
    1,194
    Thanks
    0
    Thanked
    0 times in 0 posts
    LDT X REF CLK X 2 (full duplex).

  8. #8
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    OOO... just to tell everyone... I've just ripped my housemate's 3000+ venice processor just to make OC a lil complete... expect to see both 3500+ venice and 3000+ venice by monday morning... if I dun blow things up at home...
    Me want Ultrabook


  9. #9
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    Ehehe... Fren had a birthday party down at Bristol during the weekend... Will post back my OC results tomorrow..... Cheers guys...
    Me want Ultrabook


  10. #10
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish

    OC Mission Complete... ok.. Maybe just 1/2 way there... Shuggs

    Okay... How do i put this into perspective...

    2 processors were put to the test.. ok.. MY test..
    Processor 1: 3500+ Venice
    Processor 2: 3000+ Venice
    Mobo: AV8 3rd Eye VIA K8T800
    RAM: 1 GB Corsair XMS C2
    PCI Lock status: FIXED a 66MHZ
    Cooling: Stock Boxed Cooler

    3500+ test

    Multiplier stayed at x11
    DRAM clock was dropped to 266Mhz
    HT multiplier dropped to x4
    HTT was raised slowly.. reached 220 MHz (2.42 Ghz) .. no prob.. M. Prime test.. 30 minutes with no warnings or errors - but ran at a toasty 70C

    238 MHz (2.62 Ghz) .. no prob for boot-up... no prob getting in windows.. reboot.. went into M. Prime stess... 'rounding at 0.49999.. fatal error: hardware failed' on test 3. (still at stock voltage) - never got far enuf for a constant CPU temp.. but last saw b4 failure was 75C.. yes.. mobo was beeping like no tomorrow

    Went into Bios and raised CPU voltage by 0.25V to 1.425V.. NB to 1.6V... no avail. Getting really hot.. Raised it further to 1.45V... Crashed again in Prime test.. test 2 this time.. and yes... 78C boiling hot...

    Installed NFSU2 on HT at 220 Mhz.. ran.. crashed... dun get it... Prime was stable.. at least for 30 minutes.. CPU wasnt even at 55C yet... game just crashed at the intro screen.. went back to 2.2 Ghz stock speeds... game went fine.. havent got the time to run other games.. since NFSU2 was the fastest to install.. voila..

    Dropped multiplier to x9 to search for mobo ceiling
    Raised HTT slowly.. went up to 220Mhz.. fine.. prime 30 minutes stable no errors..
    250Mhz.. fine.. prime 30 minutes stable.. no errors at 70C
    270Mhz.. fine.. prime 30 minutes stable.. no errors at 73C
    278Mhz.. fine.. prime stable... temp at 75C beeping.. beeping..
    280Mhz and above.. crashed.. not even to window splash screen..

    3000+ test

    Now.. 3000+ was also somewhere there.. I had problems trying to remove that rediculously tight heat sink socket lock... nearly ripped my skin off..

    It booted fine.. 1.83Ghz.. bla bla bla... dual channel.. 128 bit bla bla
    Bios now... can't drop multiplier.. stuck at x9
    Raised HTT slowly.. 220.. fine.. prime stable.. 30 minutes
    230... fine.. prime stable.. 30 minutes (2.070 Ghz)... prime test temp 70C
    250... fine.. prime stable.. 30 minutes (2.250 Ghz)... ditto at 73C
    267... fine.. prime stable.. 30 mintues (2.403 Ghz)... ditto at 76C
    270... fine.. prime stable.. 30 minutes (2.430 Ghz)... ditto at 78C
    275.. crashed in prime test.. boots windows XP fine.. (2.475 Ghz)
    285 (wild chance).. crashed prime test.. boots windows XP fine... crashed after 2 minutes in windows (2.565 Ghz)
    290... yep.. you guessed it... din even pass IDE checking.. (2.610 Ghz)

    Ok.. what have I learnt from this? I'm not sure.. either..
    Don't get why NFSU2 would crash.. I also did a memtest+... memory test was fine for 3 passes.. until i restarted it this morning cs i'm almost late for work.

    Any Comments?
    Me want Ultrabook


  11. #11
    Banned Smokey21's Avatar
    Join Date
    May 2005
    Location
    Stafford, Midlands
    Posts
    1,752
    Thanks
    0
    Thanked
    0 times in 0 posts

  12. #12
    Now with added sobriety Rave's Avatar
    Join Date
    Jul 2003
    Location
    SE London
    Posts
    9,948
    Thanks
    501
    Thanked
    399 times in 255 posts
    78C is way hot for a processor that's not even running 1.5V. Are you sure the HS was mounted properly? You're not using the thermal pad supplied are you? Did the HS feel boiling hot to the touch?

  13. #13
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    yes.. thats my concern.. i've installed them as the instruction booklet showed me (AMD booklet that came wif it)... still... dun get it... the HS is't that hot.. the i went back just now and ripped the HS out... the heat transfer media was indeed in contact.. greyish colour flaky sticky stuff.. will buy another A64 cooler today off my local com shop.. shugss... geez...
    Last edited by sawyen; 14-06-2005 at 12:28 PM.
    Me want Ultrabook


  14. #14
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    ohh.. and is it really important to clean the processor with stuff like AKASA cleaner grease b4 i install another HS?
    Me want Ultrabook


  15. #15
    Now with added sobriety Rave's Avatar
    Join Date
    Jul 2003
    Location
    SE London
    Posts
    9,948
    Thanks
    501
    Thanked
    399 times in 255 posts
    The thermal pad is always pretty useless. The best thing to use to clean it off (and off the processor, yes it is important) is lighter fluid. Don't buy a new HS just yet, the supplied one might well be fine once you've cleaned the goop off and put some thermal paste on there instead.

    Edit: I imagine white spirit or any other kind of non-greasy solvent will probably work well at cleaning the goop off too.

  16. #16
    Senior Member sawyen's Avatar
    Join Date
    May 2005
    Location
    Sheffield University
    Posts
    3,658
    Thanks
    7
    Thanked
    22 times in 21 posts
    • sawyen's system
      • Motherboard:
      • MSI Laptop motherboard
      • CPU:
      • Intel Core i7 740QM
      • Memory:
      • 8192MB DDR3
      • Storage:
      • 256GB SSD, 1TB WD
      • Graphics card(s):
      • AMD Mobility HD 5870
      • PSU:
      • MSI stuff
      • Case:
      • N/A
      • Operating System:
      • Win 7 64bit
      • Internet:
      • Virgin ADSL rubbish
    yikes... too late... just ripped 25 quid off my wallet.
    Went downstairs to my local shop and grabbed a Gigabyte 3D Cooler Ultra GT.. Read HEXUS review before decided on this one... gosh... Felt ripped off.. cooler for 25 big lousy quids...
    Me want Ultrabook


Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. A64 Venice Overclocking - Maximum Voltage?
    By hwAnalyst in forum PC Hardware and Components
    Replies: 23
    Last Post: 23-06-2005, 08:56 PM
  2. CPU Coolers, and suitable RAM for A64 overclocking..
    By BlueMagician in forum PC Hardware and Components
    Replies: 32
    Last Post: 16-01-2005, 08:57 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •