Please report all spam threads, posts and suspicious members. We receive spam notifications and will take immediate action!
Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18

Thread: Power saving i7 overclocking - QPI and CPU PLL voltage scaling




  1. #11

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    Hmm, DES doesn't work without C1E/EIST enabled, guess that makes sense :)

    Well there we have it. At idle, enable C1E/EIST and save ~20 watts, enable higher C states and save another ~10 watts, enable DES and save another ~3-5 watts.

    33-35 watts total savings. I'll take the free power savings please :)

  2. #12
    Join Date
    Mar 2009
    Location
    InDiA.x GhY
    Posts
    132

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    R u using the latest bios
    it is working for me (DES Advanced)
    r u using the latest DES Adv
    The Latest Bios 4 UD4P
    GA-EX58-UD4P - F8a
    The latest Des Advanced
    DES Advanced B9.0316.1

    Any how the power saving will not work above 199bclk
    But it shows how much ur saving ..............................

    My UD5 @ 166 bclk every thing works gr8
    power saving , overclocking ,etc,etc...>>>>>>>>>>

    ♥♥♥♥♥

  3. #13

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    I am using F8a bios with DES Advanced B9.0316.1

    What I said was, it doesn't work if you DON'T have C1E/EIST ENABLED. If these settings are disabled in the BIOS, then the DES software will just tell you to enable them and exit.

    I have a hard time trusting the numbers watts saved DES shows because I don't know how its calculating them, I trust my kW meter more :)

  4. #14
    Join Date
    Feb 2008
    Posts
    54

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    just checked out normal volts...and yep you are right they dont change with O/C.

    At stock i940 settings, volts normal, EIST, C1E enabled (C3/6/7 disabled) the vcore at idle is 1.05v and drawing 230W.

    I then increased the bclk to 155 for 3.4Ghz, kept volts on normal, and idle was still 230W and vcore still 1.05v idle.

    That 3.4ghz with power features similar to stock would be about a 35W saving at idle versus my current 4.2 OC, and 100W saving while gaming...and 10-13W more if enabled other C states and DES...
    3770K 4.7 - Windows 7 64 - GB UD5h - Dom 2133 - corsair 850 - Intel 520 SSD - 680 GTX - 26 inch Samsung LCD
    Lian Li G70 WC

  5. #15

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    Yeah, as long as you keep your voltage at "normal" setting, the idle consumption shouldn't change much. Gives a good performance/power ratio increase.

  6. #16
    Join Date
    Dec 2008
    Location
    Australia
    Posts
    1,183

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    Quote Originally Posted by demonsavatar View Post
    Lol doing it right now...brb in 10-15min gotta turn off my computer :)

    Also, the "Normal" setting should not be over-volting at all.
    Be careful with normal. As when I overclocked my E8500 on normal, it jacked my vcore crazy high with F7 bios

    Besides Comeon. Are serious Overclockers really concerned about power savings. If they were then we'd all be running Pentium 133Mhz's system with 16Mb Ram with 150watt PSU's and 15in LCD's. ahahaha Bring on the 2KW PSU's
    Last edited by NimrodAUS; 04-20-2009 at 05:55 PM.
    Lian Li PC-7F Chassis Black
    Gigabyte GA-X48-DS5 MB (Rev. 1.1 BIOS v.F8c)
    Gigabyte ODIN GT 800Watt PSU
    Intel Core2Quad Q9550 E0 @ 3.4Ghz @ 1.25vcore
    Noctua NH-U12P + AS5
    G.Skill 2X2GB F2-8500CL5D-4GBPK
    2 X ATI Radeon HD4850 512MB (Crossfired)
    Dell Ultrasharp 2209WA IPS
    2 X 1TB Seagate 7200.11 in RAID 1
    Pioneer DVR216 SATA DVD MultiDrive
    Windows 7 Ultimate X64 RC1 (Build 7232)
    ------------------------------------------------
    Gigabyte Poseidon Chassis
    Gigabyte GA-EP45-DS3 (Rev. 1.0 BIOS v.F9)
    ASUS Artic Square CPU Cooling with AS5
    Thermaltake TR2 RX 550Watt PSU
    Intel Core2Duo E8500 E0 @ 3.8Ghz @ 1.25vcore
    Corsair 2 X 2Gb XMS2 PC6400C5 DDR2
    NVIDIA GeForce 8800GT 512MB
    1 X Seagate 1TB 7200.12 + Seagate 750GB 7211.11
    Sony SATA DVD MultiDrive
    Windows 7 Ultimate X64 RC1 (Build 7232)
    ------------------------------------------------

  7. #17
    Join Date
    Feb 2008
    Posts
    54

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    Was that normal or auto that cranked your vcore high. I was thinking he meant "auto" as well, but normal is a different animal and is relatively new.

    I ran my E8500 at 4.4 and run my i7 is at 4.2 to 4.3 nl and 4.6-4.8 benching, but still interested in power savings/efficiency. And just started using S3 sleep mode after figuring out it would save me roughly 300Wx15hrs per day. Am I going to decrease my OC...no...but anything I can do to decrease the power without decreasing it...yes.

    Not to mention it is interesting to discover the i7's power vs performance curve.
    Last edited by rge; 04-20-2009 at 08:17 PM.
    3770K 4.7 - Windows 7 64 - GB UD5h - Dom 2133 - corsair 850 - Intel 520 SSD - 680 GTX - 26 inch Samsung LCD
    Lian Li G70 WC

  8. #18
    Join Date
    Dec 2008
    Location
    Australia
    Posts
    1,183

    Default Re: Power saving i7 overclocking - QPI and CPU PLL voltage scaling

    Yeah it was Normal. I think It may have been a issue with that version of BIOS IDK. But Needless to say I set it manually from then on after I looked in CPU-Z and vcore was like 1.47v
    Lian Li PC-7F Chassis Black
    Gigabyte GA-X48-DS5 MB (Rev. 1.1 BIOS v.F8c)
    Gigabyte ODIN GT 800Watt PSU
    Intel Core2Quad Q9550 E0 @ 3.4Ghz @ 1.25vcore
    Noctua NH-U12P + AS5
    G.Skill 2X2GB F2-8500CL5D-4GBPK
    2 X ATI Radeon HD4850 512MB (Crossfired)
    Dell Ultrasharp 2209WA IPS
    2 X 1TB Seagate 7200.11 in RAID 1
    Pioneer DVR216 SATA DVD MultiDrive
    Windows 7 Ultimate X64 RC1 (Build 7232)
    ------------------------------------------------
    Gigabyte Poseidon Chassis
    Gigabyte GA-EP45-DS3 (Rev. 1.0 BIOS v.F9)
    ASUS Artic Square CPU Cooling with AS5
    Thermaltake TR2 RX 550Watt PSU
    Intel Core2Duo E8500 E0 @ 3.8Ghz @ 1.25vcore
    Corsair 2 X 2Gb XMS2 PC6400C5 DDR2
    NVIDIA GeForce 8800GT 512MB
    1 X Seagate 1TB 7200.12 + Seagate 750GB 7211.11
    Sony SATA DVD MultiDrive
    Windows 7 Ultimate X64 RC1 (Build 7232)
    ------------------------------------------------

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

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

Posting Permissions

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