Voltage:Overclock Ratio - 2nd OC

[YiuKorochko]

Hey forum, I'd like to introduce myself and my first system a little before I move onto my main point of interest so that readers know where I'm coming from.

My first custom built system has so far went very well, however due to their not being a proper OC calculator out there yet, I've reached a fair limit.

Current system:

Intel i5 Quad Core 750 (Socket 1156) @ 2.66GHz (Stock)
Corsair H50 CPU Water Cooler
OCZ 4x1GB DDR3 PC3-8500 (533MHz)
PALiT Nvidia 9500GT 1GB GPU
Wireless B/G Network Card
2TB WD Caviare Green HDD (5400RPM)
1.5TB Seagate Barracuda HDD (7200RPM)
8x BR-ROM ODD
24x DVD-RW ODD
OCZ Silent 600W PSU
Gigabyte P55M-UD2 Motherboard

With the current system, I have been able to OC the CPU to 3GHz stably without changing the voltage of it as I'm aware of the damage it can cause. When idling (editing this post) my temperature stays around 30°C. When OCing to 3.5GHz I had crashes every 6 hours or so, thus I took it down a notch. For this particular system, I'm looking to get 3.5GHz if possible however I simply have no clue where to go with the voltage. Any help with this is appreciated, but on to my main point.

I am building a new system in September:

Intel i7 Extreme Hex Core 990x Socket 1366 3.47GHz Stock
Either Corsair H50 from old system or Corsair H70 (depending on budget)
Corsair 6x4GB Vengeance DDR3 PC3-12800 (1600MHz)
Asus Nvidia GTX 590 3GB GPU
Wireless B/G/N Network Card
Same 2 HDDs from last system, but two new added:
OCZ Vertex 3 240GB SATA-600 SSD
WD Caviare Black 2TB HDD (7200RPM)
BR drive from last system, but ditching the DVD-RW as BR has it.
1000W OCZ PSU
Asus Rampage III Extreme Black Edition Motherboard
Asus Xonar Sound+Network (Comes with Motherboard)

Now...
...I would like to know where I'm going with voltage in the case of the i7. I am aiming for 4.5GHz at least, but if possible somewhere between that and 4.8. I've seen folk on YouTube managing 5GHz stably but they have much more advanced/powerful cooling systems.

Thanks in advance to anyone who has a better idea than me, I look forward to learning a bit today!

 

[gazzaman2k]

Hey forum, I'd like to introduce myself and my first system a little before I move onto my main point of interest so that readers know where I'm coming from.

My first custom built system has so far went very well, however due to their not being a proper OC calculator out there yet, I've reached a fair limit.

Current system:

Intel i5 Quad Core 750 (Socket 1156) @ 2.66GHz (Stock)
Corsair H50 CPU Water Cooler
OCZ 4x1GB DDR3 PC3-8500 (533MHz)
PALiT Nvidia 9500GT 1GB GPU
Wireless B/G Network Card
2TB WD Caviare Green HDD (5400RPM)
1.5TB Seagate Barracuda HDD (7200RPM)
8x BR-ROM ODD
24x DVD-RW ODD
OCZ Silent 600W PSU
Gigabyte P55M-UD2 Motherboard

With the current system, I have been able to OC the CPU to 3GHz stably without changing the voltage of it as I'm aware of the damage it can cause. When idling (editing this post) my temperature stays around 30°C. When OCing to 3.5GHz I had crashes every 6 hours or so, thus I took it down a notch. For this particular system, I'm looking to get 3.5GHz if possible however I simply have no clue where to go with the voltage. Any help with this is appreciated, but on to my main point.

I am building a new system in September:

Intel i7 Extreme Hex Core 990x Socket 1366 3.47GHz Stock
Either Corsair H50 from old system or Corsair H70 (depending on budget)
Corsair 6x4GB Vengeance DDR3 PC3-12800 (1600MHz)
Asus Nvidia GTX 590 3GB GPU
Wireless B/G/N Network Card
Same 2 HDDs from last system, but two new added:
OCZ Vertex 3 240GB SATA-600 SSD
WD Caviare Black 2TB HDD (7200RPM)
BR drive from last system, but ditching the DVD-RW as BR has it.
Same PSU from last system if possible
Asus Rampage III Extreme Black Edition Motherboard
Asus Xonar Sound+Network (Comes with Motherboard)

Now...
...I would like to know where I'm going with voltage in the case of the i7. I am aiming for 4.5GHz at least, but if possible somewhere between that and 4.8. I've seen folk on YouTube managing 5GHz stably but they have much more advanced/powerful cooling systems.

Thanks in advance to anyone who has a better idea than me, I look forward to learning a bit today!

the hex cores are not the best overclockers to be honest, the oens you see with 5ghz or more are using Dry ice or other extreme cooling not used for day to day only for benching.

a 2600k wipes the floor with them

 

[YiuKorochko]

the hex cores are not the best overclockers to be honest, the oens you see with 5ghz or more are using Dry ice or other extreme cooling not used for day to day only for benching.

a 2600k wipes the floor with them

According to the few benchmarks I've seen, the 990xs score better. The Xeons even score better than the 2600ks.
The 2600ks are really only for benchmarking. Bringing paper to fact. I'm in this for real world work.
But anyway, I'm looking for voltage tips so I can overclock my i5 and i7 higher.

EDIT:
I've also managed to get my clock speed to 3.74GHz, and so far it seems stable. What I may have done is not messed with the RAM Multiplier. When I first OCd, the RAMM was left to [Auto] but after setting it to [Manual] and changing it from [x8] (1400MHz) to [x6] (1066MHz, stock speed) I've been cruising fairly well. This motherboard doesn't seem to have an option for Voltage changes, though I don't think I really need it if it may have been my RAM originally.

 

[Devrij]

You sure your volts aren't on auto? If so they'll raise themselves (caution to that!) .

 

[YiuKorochko]

You sure your volts aren't on auto? If so they'll raise themselves (caution to that!) .

I think it may very well be. I think my problem beforehand was the RAM multiplier. With 1066MHz default with an 8x Multiplier, the [Auto] Setting thought that 8x would still be acceptable between FSB 130mhz and 178MHz. I manually changed it to 6x and the RIG is performing outstandingly, funny enough.

My current V is 1.312, I can't recall the original...
*Googles*
According to Intel, the i5 750 supports between 0.65V and 1.4V So I've still got a little bit of breathing room. I'll not stretch it any further as my ram is already 2MHz over stock and while that not seem much I really don't know how much they can handle.