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Help/advice tweaking i5 760 + EVGA P55

Discussion in 'Overclocking & Cooling' started by Wrigleyvillain, Aug 22, 2010.

  1. Wrigleyvillain

    Wrigleyvillain PTFO or GTFO

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    First experience with Nehalem and definitely happy (esp considering what I paid) but I'm hoping to get 4Ghz with less vcore and vtt than using now. Just started the process and so far stable at 200x20 for 4005 maxing at about 55C priming with 1.33v or so vcore and 1.275 VTT. PCH at 1.25 and PLL at 1.85 default. Tried vcore as low as 1.25v but not stable and I seem to need this fairly high VTT for stable 200 bclk. My board the LE has lower end PWM that other EVGA P55s for the record (only $90 after rebate couldn't pass that up)...
  2. wolf

    wolf Performance Enthusiast

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    at 1.35 vcore this chip should do 4.2ghz, I'm not sure if i5 quads get turbo mode off the top of my head but if so, and if your board supports it you may have access to 22-23x multi, which if you are happy with just 4ghz, means you can lower the bclk and hopefuly vcore too.

    hec even at 21x multi you can lower the bclk to keep 4ghz but from experience ram speed gets annoying for a bclk of 191mhz
  3. Wrigleyvillain

    Wrigleyvillain PTFO or GTFO

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    Yeah I have Turbo (no HT). Actually havent tried to go manually higher than 21 in BIOS. Isn't that just one core in Turbo though? Or is the just with the highest multi?

    Yeah I played with bclks from 160 to 185 yesterday. My RAM at a nice even rated 1600 at 200 on the 8 divider. Again still tweaking but 200 seems to be the best spot so far. These are the 9-9-9 Ripjaws and won't do much better than 1700 in my initial testing.
  4. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    looks about right to me. I use more volts for my settings of 4ghz with 2400mhz ram.

    Turbo only works if Speed Step is functioning. The CPU has to be only using 1 core, or set to one core in bios, to get the benefits of Turbo.
    drdaver, coljarcker and Wrigleyvillain say thanks.
  5. wolf

    wolf Performance Enthusiast

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    its weird tho because on my i7 920 with a stock multi of 20x, that was the max i could set until i updated the bios then 21x became availaible...

    this was on an Asus P6T Deluxe V2.
  6. Wrigleyvillain

    Wrigleyvillain PTFO or GTFO

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    Yeah I want your RAM peet. There was a set on eBay a few days ago for only $85 BIN. Shoulda grabbed it cause it was gone an hour later.
  7. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    you should have nabbed it, this ram is the figgin s*@t! I could run the Tridents at similar speeds but it was hell on the CPU and I needed way more voltage to get there.

    Something to realize for you though. The 760 only has a 10X ram multi, so to run 2400mhz you need a 240 bclk. With my 860 I have a 12X multi so at 200 bclk I am running the ram at 2400.
  8. Wrigleyvillain

    Wrigleyvillain PTFO or GTFO

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    Oh I was talking about the Tridents; didn't know you had those Sector 5's. $125 at the Egg so $85 is pretty good.

    Yeah...I really only need 2000 at nice timings. Your Tridents for sale? :p
  9. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    No they went here VVVV. I sold the Geil Ultras she had.

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