Q6600 - Is it native 1333mhz

[manbush]

I bought the GA-P35-DQ6 which can handle 1333mhz natively. My RAM cannot however handle that speed so I will have to leave it at 800mhz.

I also bought the Q6600 which is rated for 1066mhz FSB. If I raise the FSB to 1333mhz (native support in P35....NOT overclocking)....will it be overclocking my CPU? I do not want to overclock (I want maximum stability)

[inkfx]

Just FYI you can overclock and have maximum stability. ;)

[hUMANbEATbOX]

I bought the GA-P35-DQ6 which can handle 1333mhz natively. My RAM cannot however handle that speed so I will have to leave it at 800mhz.
your ram is rated at ddr2-800, which means it actually runs at 400mhz. your mobo can handle a 1333 bus speed, which is actually 1333/4=333fsb. your ram is always running as fast as your fsb, so in this case, you ram is actually faster than your fsb (400 vs 333).


I also bought the Q6600 which is rated for 1066mhz FSB. If I raise the FSB to 1333mhz (native support in P35....NOT overclocking)....will it be overclocking my CPU? I do not want to overclock (I want maximum stability)

if you raise your fsb to "1333", what you would ACTUALLY be doing, is changing it from 266 to 333fsb (because 266*4=1066, the "bus" speed is always 4x what the actual FSB is). your cpu's clock speed is always its FSB times its MULTIPLIER. your cpu has a default multi of 9, so stock speeds are 266*9=2400mhz. if you raise it to 333*9, you would have a cpu speed of 2997mhz, so yes, you would be overclocking your cpu by about 600mhz. this is very achievable for your cpu, but if you don't want ANY cpu oc, and you want to run the faster fsb, you can lower you multi in the bios to 7, and run 7*333=2331mhz, so actually lower than default clocks. the only other option is run 8*333 for 2664mhz, still overclocking your cpu, but only by about 260mhz. this would give you qx6700 speeds, and would be a very easy OC.

if you want to keep your cpu at EXACTLY 2.4ghz, you will have to run 7*343=2401mhz. your ram and your mobo will be able to do these speeds easily.

if you want me to reiterate anything lemme know. sometimes i'm not so good at explanations. :p

[BLOOP!]

dude, we've been chatting the whole day :p get some rest you have alot of oc'ing to do tomorrow.

Like they said you can oc to 1333 FSB and still be 100% stable. You have a good cooler so no worries there :)

congrats on your news toys man!

[manbush]

The motherboard is out for delivery by UPS.
Can't say the same about the quad-core. I ordered 1pm EST yesterday and it's still at step 3 in newegg (they have it in stock). Not sure why they didn't ship it the same day since I specified fedex overnight.

Damn, so raising the FSB to 1333mhz is overclocking eh?

"your ram is rated at ddr2-800, which means it actually runs at 400mhz. your mobo can handle a 1333 bus speed, which is actually 1333/4=333fsb. your ram is always running as fast as your fsb, so in this case, you ram is actually faster than your fsb (400 vs 333)."

I'm not sure I understand. DDR2 is 800mhz (2x 400mhz) but the FSB at stock is 266mhz (266*4=1066mhz).
So...are you saying that my DDR2 IS SPECIFIED to run at 1333mhz FSB? (I have 2x 1gig + 2x 2gig Patriot eXtreme performance DD2-800)

[batboy]

Your RAM is rated at DDR2-800, so it's guaranteed to run at least DDR2-800. If you are using the 1:1 memory ratio, then your RAM can handle 400 FSB (or 1600 MHz system bus speed).

You are confusing true FSB with system bus speeds. Your CPU runs at a default 266 FSB. Since Intel uses a quad pumped system bus, the system bus is 266X4=1066 MHz.

If you run your new system at 1333 system bus speed, then that is really 1333/4=333 FSB. With proper cooling, your new CPU should be able to handle that overclocked speed and certainly your RAM will run at that speed no problem because it's less than what it's rated at.

EDIT: corrected a mistake.

[Mrr.guy]

If you run 1:1 in bios your ram speed will mathc your fsb
So say you leave it at stock, with 1:1 youll be running 266 on the ram.
Say you overclock to an fsb 400, you will be running your rams default speed of 400 (800mhz)

Also where are the p35 boards availible?

[BLOOP!]

Did it ship out already?

Also where are the p35 boards availible?

Got mine here (http://www.xpcgear.com/p5kdeluxe.html). Cheapest that I found.

[manbush]

I got mine the same place BLOOP got it. XPCGear is fast to ship HOWEVER, they offer NO 1 YEAR REPLACEMENT like newegg does and ONLY RETURN/REPLACEMENT FOR the same item within 7 days.

Thanks for the explanation guys. I think I will run at 1333mhz speed, I just need to make sure it's 100% stable.

Do you think overnight memtest + orthos should do it?

[BLOOP!]

Yes, 6-8 hours of orthos at priority 9 should be enough. It's only going to be a mild oc, and if lucky you might not even need to raise vc :)

[manbush]

I'm still wary of increasing the native FSB support to 1333mhz which will cause the CPU speed to OC to 3ghz.

The reason is that I run a database server on it and it does some precision arithmetic calculations.....cannot have those error out or the database crash itself too.

Do you guys recommend me running 1333mhz? I don't think my RAM can handle 1333mhz. When I oced on an different mobo, I was able to reach 2ghz FSB speed but I had to leave the RAM speed around 886mhz or it would fail Prime95. Therefore, I don't think the ram can reach 1333mhz so I willl have to run the ram in some kind of ratio (lock it down to 800mhz)

[GigaHertzAddict]

I'm still wary of increasing the native FSB support to 1333mhz which will cause the CPU speed to OC to 3ghz.

The reason is that I run a database server on it and it does some precision arithmetic calculations.....cannot have those error out or the database crash itself too.

Do you guys recommend me running 1333mhz? I don't think my RAM can handle 1333mhz. When I oced on an different mobo, I was able to reach 2ghz FSB speed but I had to leave the RAM speed around 886mhz or it would fail Prime95. Therefore, I don't think the ram can reach 1333mhz so I willl have to run the ram in some kind of ratio (lock it down to 800mhz)

AAAAAAAHHHHHHHHHHHH!!!! ok I just had to let that out... just lower the multi to 7 and run it @ 7x333MHz.. You'll actually be running LESS than 2.4GHz (2.33GHz to be exact) which will make you feel even safer.. Listen the bottom line is if the data is so sensitive and you are so worried just don't overclock at all... But 7x333MHz is a non-overclocking option for you... The board you ordered supports 1333MHz default..

[TheCheat]

Do you guys recommend me running 1333mhz? I don't think my RAM can handle 1333mhz. When I oced on an different mobo, I was able to reach 2ghz FSB speed but I had to leave the RAM speed around 886mhz or it would fail Prime95. Therefore, I don't think the ram can reach 1333mhz so I willl have to run the ram in some kind of ratio (lock it down to 800mhz)

When your CPU is at stock (266*4 = 1066fsb --- 9*266=2.4ghz) your ram is running at 266 * 2 (dual data rate) for an effective ddr2 533.

Obviously your ram is rated for up to ddr2 800. So if you raise your fsb from 266 to 333, your ram will still be within spec because a 333fsb is DDR2 667.

Hope that clears things up.

[BLOOP!]

Dude, you're confused. Like batboy said

If you set your FSB to 1333 (333 x 4) your ram is going to run at only DDR2-667 (333 x 2) Not 1333 not even 800. As long as you keep it 1:1. And thats below your ram spec :)

[manbush]

So, to keep it 1:1, I should run it at 1333mhz right?

[manbush]

AAAAAAAHHHHHHHHHHHH!!!! ok I just had to let that out... just lower the multi to 7 and run it @ 7x333MHz.. You'll actually be running LESS than 2.4GHz (2.33GHz to be exact) which will make you feel even safer.. Listen the bottom line is if the data is so sensitive and you are so worried just don't overclock at all... But 7x333MHz is a non-overclocking option for you... The board you ordered supports 1333MHz default..


So.....if I set my bus speed to 400mhz, my cpu would be 3.6ghz and my ram would be the SPECIFICIED 800mhz right?

If so, then the ONLY component I would be overclocking would be the bus speed only?

EDIT:
I checked the BIOS. It says the CPU host Frequency is at 266mhz (I'm assuming this is the bus). It's also saying that the "System Memory Multiplier (SPD) " is set to "AUTO" and the speed it's at is "800mhz". I can manually set it to "3.00" to give "800mhz" too.

So is my RAM automatically running at 800mhz at 266mhz BUS like my BIOS is stating or is it wrong?


CPU-Z is however saying:
RAM freq: 400mhz
FSB:DRAM: 2:3

So is the BIOS or CPU-Z correct?

[manbush]

Ok, I think I understand now. Correct me if I'm wrong.

1:1 means memory and BUS SPEED runs at the same speed.
So if my bus speed is 266mhz, and the FSB:DRAM ratio is 1:1:, then (266*1.00)
memory speed is 533mhz.

So if my bus speed is 266mhz, and the FSB:DRAM ratio is 2:3:, then (266*3.00) memory speed is 800mhz.

So if my bus speed is 333mhz, and the FSB:DRAM ratio is 2:2.5:, then (333*2.50) memory speed is 830mhz.


Since I want to run 1333mhz on a motherboard that NATIVELY SUPPORTS IT, I would be overclocking the ram because the ram is rated for 800mhz. I would be overclocking it by 30mhz.
I could set the divider to 2.0 and get 666mhz RAM speed instead.

Is this ok? What do you think?

[GTengineer]

OH FOR CRYING OUT LOUD!

If you run 1333MHz then
1333/4 = 333.25
if you multiply this by 2 (333.25 x 2 = 666.5MHz) with 1:1 ratio which means your memory will run at DDR2-667 speeds well below the specs of DDR2-800

and why do you keep bringing up "1333MHz native support"? the Q6600 is a 1066MHz processor. Running it at 1333MHz FSB means you are overclocking it.

[batboy]

If you are using the 1:1 memory ratio, then your RAM can handle 400 FSB (or 1200 MHz system bus speed).

I made an error. I should of said this: If you are using the 1:1 memory ratio, then your RAM can handle 400 FSB (or 1600 MHz system bus speed. I changed it in my original post. Sorry if I added to the confusion.

Manbush, if you can run Ortho for 12 hours and temps are acceptable, I'll guarantee your O/C will be perfectly stable and error free.

There is nothing magic about 1333 bus speed, unless you have a 1333 processor. When your motherboard claims to support 1333 natively, it just means it will support the upcoming 1333 processors. It's just marketing. My motherboard will support it too even though they haven't advertised it as such. How do I know? Because it will O/C to 400 FSB no problem which is 1600 bus speed.

[manbush]

For running database servers and compiling very large apps (right now, my core 2 E6400 takes about 10 seconds to compile)...do you recommend ocing? I'm very tempted to hit the 1333mhz FSB but the temps, the voltage, the "worries" are getting to me. Mainly, it's the stability and the temps

Sometimes, I write bad code and the code gets stuck in an infinite loop or I query the database with a non-optimized query on 60 million rows = disaster. The quad-core will DEFINETLY help because I can scale the DB and APP to use two seperate cores. On my E6400, it was sluggish sometimes.

[.:DuD3:.]

If you are so worried about overclocking it, dont do it :).

[batboy]

I'll throw out another possible option. Do a modest O/C of 300 FSB. You should be able to easily achieve that with default vcore. A modest O/C like this will certainly be completely stable and error free. Still run Orthos to make sure though. Now, set the memory ratio to 3:4 which runs the RAM at a memory frequency of 400 MHz which is DDR2-800. Tada, the RAM is perfectly in spec and you have a nice performance boost from the modest O/C.