EVGA 750i FTW Overclock Thread

[Eastrider]

Originally Posted by PizzaMan

First of all, they are called "straps" not FSB holes. Just like your ram timings have to be either loosened or more volts added as you increase Mhz, your NB has timings that change as the Mhz increase. Try jumping 100Mhz on your FSB and try again.

Let me give you an example as how this works. I had a 680i board that had a 1066 strap that end at 1300. At 1301 the 1333 strap started. When I got to around 1220-1250 I really had to start increasing the NB voltage. At 1270 I had to start giving SB voltage. I could take it all the way to 1300, but I had to max out both the NB and SB voltage. When I reached 1301 I could bring both the NB and SB back to default voltage because the timings changed to looser values. With this being said you my wonder about performance. When just like ram, your board performs a little better with tight timings. I got a 80MB/s mem bus increase at 1300 vs 1301.

Sorry for the rant, but I use to believe in FSB holes too. Though, of course there may be boards out there that with max NB and SB voltages they can't even reach the top of a strap and have a hole where it is impossible to post. Haven't played with any yet.

Cool, thanks for the advice. I would try increasing the FSB, for seeing.

Bye!

[amircesc4]

Originally Posted by Microsis

Got you added. Stable?

yup. pretty much. passed OCCT & >6 hours prime95.

[Eastrider]

MEGATIP:

I'm being right now 20 minutes stable and still counting (RECORD! Last was 6!) just dropping LDT Multiplier to x4. I again don't know if already was poster, but it's so useful.

[speeddemongto]

guess my problems with the ram would contribute to my bad luck trying to overclock. lol

[amircesc4]

Originally Posted by Eastrider

MEGATIP:

I'm being right now 20 minutes stable and still counting (RECORD! Last was 6!) just dropping LDT Multiplier to x4. I again don't know if already was poster, but it's so useful.

what is your current bios settings? mind sharing?

[Eastrider]

Originally Posted by amircesc4

what is your current bios settings? mind sharing?

Hum, if you mean CPU Features, everything's disabled.

If you mean voltajes, and that things... 1,5125 in BIOS, 1,35V in FSB, 1,45 in SPP and 1,925 in memories at 800 MHz 4-4-4-13-1T. Lanes 80-85-80-85. LDT Multiplier x4.

Prime is unstable, it gift me a wonderful BSOD after ~25 minutes. WHY THE **** I can't hold that prequency so long? And it's just in Prime. I pushed the CPU to 100% with WinRAR and I was playing Crysis Warhead about 3 hours without any problem, with overclocked GPU even. But Prime just kicks me out again and again, and I'm afraid to use more voltage. I'm sure that are the GTLVREF Lanes... but is really hard to test them one by one.

Bye!

[PizzaMan]

Try looser timings. Like 5-5-5-15-2T. That way you can rule out ram as an issue. I wouldn't have your ram running a 1T 800Mhz timings while you still testing your CPU OC. Overclock one component at a time.

[Eastrider]

They're done that way with that latencies, I ran memtest and nothing get wrong. They're totally stable (My RAM).

And I have now a stable configuration, so you can add me to the main post. Probabily I'll update it soon, but atm, this is what I have.

Q6600 G0 - 3,20GHz - 1.328v (1,310 VID)
G.Skill PC2-8800 800MHz 4-4-4-13-1T
FSB 1,35 V / SPP 1,45 V
Lanes 80 / 85 / 80 / 85

[NoodleGTS]

Hey buddy, keep trying... it can be done!

[PizzaMan]

Passing memtest doesn't always mean your ram is stable. I can set mine to some settings and pass memtest, but not be able to boot windows w/o freezing. memtest does not 100% warrant stable ram. Your ram my very well be stable. It's just a good idea do down clock it while you are still testing an overclock on your CPU.

You should also try some different dividers.