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Quad Core OC ....
- Thread starter cjvdh
- Start date
You should check out the overclocking guide...it'll answer a lot of questions.
Basically right now you're at 266 (fsb) x 9 (multiplier) with a vcore (cpu voltage) of somewhere in the neighborhood of 1.275v. In your bios, there'll be a hardware monitoring menu that tells you your current voltages and current temperatures.
Like was mentioned above, you'll be increasing your fsb so if you increased it to 300mhz, your oc'd speed would be 300 x 9 = 2700mhz. Your fsb will be 300 x 4 (quad ddr) = 1200mhz. Up to a point ...say 3ghz or less, you can do this without increasing the cpu voltage (cpu vcore) but at any speed if your computer is crashing or you are failing prime95 (stress testing program), then you need to increase the vcore a notch or two to increase stability. Alternately, you can change the multiplier from 9 to something below that if you want to try a different fsb/multi combination to get to the same speed (400x9, 450x8, etc.)
Meanwhile, as you increase the fsb, you may need to increase the fsb (aka mch aka northbridge) voltage a notch. Again, up to 3ghz you may be ok without touching that. But it's something to consider.
The last big thing is that your memory speed increases as your fsb increases, so you need to watch the ratio of your fsb speed to your ram speed (fsb:dram). Your mobo will have preset ratios (aka dividers) that will allow you to help you keep your ram in its speed range. If you are using 800mhz ddr2 (400mhz x 2), then for instance, you could try 400 x 8 = 3200mhz, and your ram would be at 1:1 ratio. Some people say there's a performance / stability benefit to doing that, but I haven't really noticed anything. In any case the point is if you want your ram to run close to the speed it's rated for, you'll choose a divider.
And for safety's sake, try and keep the Vcore under 1.5V and the cpu temperatures below 65C (under load).
You can use either a utility that came with your motherboard to keep track of temps or something like Realtemp.
Aside from that...you may encounter two things when you set the Vcore in the bios. If, for example, you set your Vcore to 1.325 in the BIOS and it says 1.30 in Windows, that's call "Vdrop". So you'll have to compensate for that. Also, when your computer is under load the Vcore may drop even lower (say 1.28V) and that's called Vdroop. Some motherboards don't have much of that, some have more. Some motherboards have options to compensate for that Vdrop right off the bat in the BIOS.
So that's the quick and dirty tutorial for ya...but you should read up in the overclocking guide for more details and logical ways to go about setting up options.
Basically right now you're at 266 (fsb) x 9 (multiplier) with a vcore (cpu voltage) of somewhere in the neighborhood of 1.275v. In your bios, there'll be a hardware monitoring menu that tells you your current voltages and current temperatures.
Like was mentioned above, you'll be increasing your fsb so if you increased it to 300mhz, your oc'd speed would be 300 x 9 = 2700mhz. Your fsb will be 300 x 4 (quad ddr) = 1200mhz. Up to a point ...say 3ghz or less, you can do this without increasing the cpu voltage (cpu vcore) but at any speed if your computer is crashing or you are failing prime95 (stress testing program), then you need to increase the vcore a notch or two to increase stability. Alternately, you can change the multiplier from 9 to something below that if you want to try a different fsb/multi combination to get to the same speed (400x9, 450x8, etc.)
Meanwhile, as you increase the fsb, you may need to increase the fsb (aka mch aka northbridge) voltage a notch. Again, up to 3ghz you may be ok without touching that. But it's something to consider.
The last big thing is that your memory speed increases as your fsb increases, so you need to watch the ratio of your fsb speed to your ram speed (fsb:dram). Your mobo will have preset ratios (aka dividers) that will allow you to help you keep your ram in its speed range. If you are using 800mhz ddr2 (400mhz x 2), then for instance, you could try 400 x 8 = 3200mhz, and your ram would be at 1:1 ratio. Some people say there's a performance / stability benefit to doing that, but I haven't really noticed anything. In any case the point is if you want your ram to run close to the speed it's rated for, you'll choose a divider.
And for safety's sake, try and keep the Vcore under 1.5V and the cpu temperatures below 65C (under load).
You can use either a utility that came with your motherboard to keep track of temps or something like Realtemp.
Aside from that...you may encounter two things when you set the Vcore in the bios. If, for example, you set your Vcore to 1.325 in the BIOS and it says 1.30 in Windows, that's call "Vdrop". So you'll have to compensate for that. Also, when your computer is under load the Vcore may drop even lower (say 1.28V) and that's called Vdroop. Some motherboards don't have much of that, some have more. Some motherboards have options to compensate for that Vdrop right off the bat in the BIOS.
So that's the quick and dirty tutorial for ya...but you should read up in the overclocking guide for more details and logical ways to go about setting up options.
Ocellaris
Fully [H]
- Joined
- Jan 1, 2008
- Messages
- 19,075
use the bios setting, the overclocking app that msi provides is terrible and going to cause you more trouble than anything.
for a quick and easy oc, go into the bios cell menu, change the fsb to 333, the ram will automatically set itself to the right speed, then save and rebbot and you wil be at 3ghz. almost all q6600s will work fine like that.
for a quick and easy oc, go into the bios cell menu, change the fsb to 333, the ram will automatically set itself to the right speed, then save and rebbot and you wil be at 3ghz. almost all q6600s will work fine like that.
Ocellaris
Fully [H]
- Joined
- Jan 1, 2008
- Messages
- 19,075
Hit DELETE while you PC is booting, that should get you into the BIOS. Also, it actually says right there on the boot screen "Press <DEL> to enter setup menu"
Hit DELETE while you PC is booting, that should get you into the BIOS. Also, it actually says right there on the boot screen "Press <DEL> to enter setup menu"
Yes im going to give this a try right now.
Ocellaris
Fully [H]
- Joined
- Jan 1, 2008
- Messages
- 19,075
Eh, not on Core 2 based chips. Heat is rarely a limiting factor until you get over 80C.
Are those idle temperatures or full load temperatures(Prime95 on all cores, Orthos, or OCCT)?
My personal safe limit is 70 on a Q6600 G0. I make sure that it never goes above this while running Prime95. Running other non-stress test programs means that it's about 65 max.
known12345
Limp Gawd
- Joined
- Nov 17, 2007
- Messages
- 311
You should use prime98 to test for stability on your computer.... Running multiple programs at the same time stresses your cpu but it rarely stresses it to the maximum (ofcourse if you use plenty of programs then you will reach 100% eventually). Running prime95 stresses all your cores to 100% (look at task manager when its running) and test your system's stability. If it is unstable, that is when an error occurs, then if by chance your in a situation where all your cores are at 100% (lets say you are running too many programs on at the same time), there is a chance that your comp would not be able to handle all the programs and crash/lag/become unstable. Now im not saying you cant use your computer if you fail a prime95 stability test, you still can, its just you cant exactly utilize all 4 cores with the thought it will not die on you when you put alot of load on it.
I highly suggest you test via prime95 after every time you oc. In this order:
1. Raise FSB, READ THE GUIDE, it helped an idiot like me understand oc
2. Run prime95 for 10 minutes, if no errors occur increase FSB accordingly
3. When prime95 fails within 10 min, either increase voltage/lower OC
4. When you have time, run prime95 for atleast 8 hours overnight to see if it remains stable.
I highly suggest you test via prime95 after every time you oc. In this order:
1. Raise FSB, READ THE GUIDE, it helped an idiot like me understand oc
2. Run prime95 for 10 minutes, if no errors occur increase FSB accordingly
3. When prime95 fails within 10 min, either increase voltage/lower OC
4. When you have time, run prime95 for atleast 8 hours overnight to see if it remains stable.