Help me understanding E4300 Overclocking Memory Requirement

[harpoon84]

Q: Would both of these would retain the desirable 1:1 ratio, or am I mucking something up?
A: They would retain the 1:1 ratio.

Q: Would this overclock be entirely feasible on something like a P5B Deluxe?
A: Totally, the P5B Deluxe has been known to exceed 500MHz FSB speeds.

Q: If you had PC8500 RAM, would running it at PC6400 to attain the 1:1 ratio allow you to set better timings, or would it be better to pick up some high quality PC6400 RAM instead?
A: It is possible, but it is definitely NOT worth the added expense to get PC8500 over PC6400. Good quality PC6400 (using Micron D9 chips, check this list http://ramlist.ath.cx/ddr2/ ) can usually handle 3-3-3-9 timings anyway. Even if it doesn't, there is virtually ZERO difference between 3-3-3-9 and 4-4-4-12 timings on the C2D platform. We are talking differences of 0.5% here, totally insignificant in the grand scheme of things.

 

[gerwen]

Originally posted by: Sapiens

Stock E6600
266 MHz FSB, 9x multiplier = 2.4 GHz
You would need 533 MHz RAM (266*2)

Overclocked E6600
400 MHz FSB with an 8x multiplier = 3.2 GHz
You would need 800 MHz RAM (400*2)
- Would both of these would retain the desirable 1:1 ratio, or am I mucking something up?

Exactly right.

- Would this overclock be entirely feasible on something like a P5B Deluxe?

From what i hear the P5B Deluxe is a great board. I went with the cheaper board in my sig, and have the same oc.

- If you had PC8500 RAM, would running it at PC6400 to attain the 1:1 ratio allow you to set better timings, or would it be better to pick up some high quality PC6400 RAM instead?

Like harpoon said, it's probably not worth the extra expense.

I did some quick experiments with Ram timings this past weekend, at both stock speed on my processor (2.13GHz 266FSB) and my stable overclock (3.2GHz 400FSB).

I tested ram timings, and their performance effect on SuperPi. Going from 6-6-6-18 to 5-5-5-15 to 4-4-4-12. There was a noticeable difference on the 1M scores. I did five runs on each timing and averaged the results. It was only about 0.5% inprovement going from loose to tight timings.

My test wasn't exactly scientific, but it gave me a result i could use. 0.5% isn't something i'm willing to pay a premium for.

My advice on buying Ram because of this? Figure out what overclock you will be shooting for. Buy the cheapest ram you can find that will do the FSB required for that overclock. If you're shooting for a 400 FSB, get the cheapest DDR2-800 ram you can find. If you want over the 400FSB, that's where the Micron Chips Harpoon mentioned come in.

 

[wolfram025]

Hello guys, I'm new around here

I just wanted to ask a simple question. I know I'm too dumb, but here it goes:
I have a Gigabyte GA-965P-S3 mobo, 1GB of Corsair XMS2 DDR2-800 RAM, and I want to get a E4300 CPU.

I plan to overclock the E4300 to 2.4 Ghz (a 1066 FSB). What RAM-FSB ratio will I be using? What ratio would you recommend for me to use?

Thanks!!

 

[Assimilator1]

Welcome to AT

Not sure what ratio you'd need as it'd be somewhere between 1:1 & 2:1 ,assuming it exists ,I'll defer to the others
Btw why limit yourself to just 2.4GHz?

 

[gerwen]

Originally posted by: wolfram025
Hello guys, I'm new around here

I just wanted to ask a simple question. I know I'm too dumb, but here it goes:
I have a Gigabyte GA-965P-S3 mobo, 1GB of Corsair XMS2 DDR2-800 RAM, and I want to get a E4300 CPU.

I plan to overclock the E4300 to 2.4 Ghz (a 1066 FSB). What RAM-FSB ratio will I be using? What ratio would you recommend for me to use?

Thanks!!

At that speed it's a 266 FSB, so you could run the ram at a 1:1 ratio (ram at 533) or a 3:2 (I think that's what it's called) ratio (ram at 800)

You could easily push that chip higher with a 1:1 ratio. You'll likely hit other walls before you hit the memory's wall at 400 FSB. 3.2 GHz should be attainable for you with decent cooling like the $30 Freezer 7 Pro.

 

[wolfram025]

Thank you a lot guys for the welcome

I think I should be fine running a 1066 FSB, 2.4 Ghz speed, because I only have a RX-850XT PE video card, and I'll be using stock cooling for a while.
Of course I plan to overclock it more when its needed

BTW, what kind of CPU cooler do you recommend? The Freezer 7 pro? Some Zalman?

Thanks!

 

[cyclejim]

Hi All. Trying to figure this out also. If my motherboard only supports DDR2-533 memory it looks like I can only hope for running the E4300 at approx 2.4 GHZ meaning 266 FSB, running DDR2-533? Got the MB (ECS) in a combo for a great deal but I normally wouldnt have purchased this MB due to its limitations.

 

[Steaksauce]

Originally posted by: cyclejim
Hi All. Trying to figure this out also. If my motherboard only supports DDR2-533 memory it looks like I can only hope for running the E4300 at approx 2.4 GHZ meaning 266 FSB, running DDR2-533? Got the MB (ECS) in a combo for a great deal but I normally wouldnt have purchased this MB due to its limitations.

Well, the RAM could probably overclock a little so a FSB of 300 might be doable with your RAM doing 600MHz and with the CPU at 2.7. But, that only depends on if that ECS let's you go up that much and whether or not it's stable at those FSB speeds.

 

[Steaksauce]

Originally posted by: wolfram025
Thank you a lot guys for the welcome

I think I should be fine running a 1066 FSB, 2.4 Ghz speed, because I only have a RX-850XT PE video card, and I'll be using stock cooling for a while.
Of course I plan to overclock it more when its needed

BTW, what kind of CPU cooler do you recommend? The Freezer 7 pro? Some Zalman?

Thanks!

As far as cooling, how much room do you have in your case, what case is it?

The freezer series are cheap and do a decent job, the Zalman 9700 are very nice, of course there are the ultra 120, Big Typhoons and the Tuniq Towers but those are big.

 

[Component187]

Originally posted by: gerwen

Originally posted by: Sapiens

Stock E6600
266 MHz FSB, 9x multiplier = 2.4 GHz
You would need 533 MHz RAM (266*2)

Overclocked E6600
400 MHz FSB with an 8x multiplier = 3.2 GHz
You would need 800 MHz RAM (400*2)
- Would both of these would retain the desirable 1:1 ratio, or am I mucking something up?

Exactly right.

- Would this overclock be entirely feasible on something like a P5B Deluxe?

From what i hear the P5B Deluxe is a great board. I went with the cheaper board in my sig, and have the same oc.

- If you had PC8500 RAM, would running it at PC6400 to attain the 1:1 ratio allow you to set better timings, or would it be better to pick up some high quality PC6400 RAM instead?

Like harpoon said, it's probably not worth the extra expense.

I did some quick experiments with Ram timings this past weekend, at both stock speed on my processor (2.13GHz 266FSB) and my stable overclock (3.2GHz 400FSB).

I tested ram timings, and their performance effect on SuperPi. Going from 6-6-6-18 to 5-5-5-15 to 4-4-4-12. There was a noticeable difference on the 1M scores. I did five runs on each timing and averaged the results. It was only about 0.5% inprovement going from loose to tight timings.

My test wasn't exactly scientific, but it gave me a result i could use. 0.5% isn't something i'm willing to pay a premium for.

My advice on buying Ram because of this? Figure out what overclock you will be shooting for. Buy the cheapest ram you can find that will do the FSB required for that overclock. If you're shooting for a 400 FSB, get the cheapest DDR2-800 ram you can find. If you want over the 400FSB, that's where the Micron Chips Harpoon mentioned come in.

The multiplier on a E6600 goes up to 9, so wouldn't it be more efficient to use:
9x360FSB=3.24 Ghz
with 1.42 voltage, +.1mch, +.1fsb....
DDR2 800 RAM at 4-4-4-15 (stock specs for the RAM)
?

I mean, there's not going to be much difference from running a 8x400FSB is there? And won't this run less hot? Correct me if I'm wrong here.

 

[Nickel020]

Whether 9x360=3.24GHz or 8x400=3.2GHz is better depends on the application, some programs will benefit more from the higher memory & FSB speed, others more form the slightly higher CPU speed when using 9x360.

Heat-wise there should be no noticeable difference, ehat mostly depends on teh CPU voltage, clock speed has much less of an effect on heat. Actually, in some silecening forum I saw a pic of someone operating an A64 at something like 0.85V and 800 MHz with out a heatsink.... (not under load though)

 

[Component187]

I'm now running 8x400 with only 1.35v CPU and +.1 to mch. All other voltages stock. RAM is running at it's factory 800 settings. Temps are around 28-30 idle and around 45 full load during Prime95 stress testing.

 

[cRaZyMiLk]

Hey guys

Sorry to start up such an old thread but i found it very useful

one quick question, if i am running a QX6700 which has an unlocked multiplier(10), and standard 266 FSB (=2.66Ghz) then is there any point buying say PC 8000 = DDR2 1000 MHz = 500 MHz

As i can just up the multi to say 13 which wouldl give me 3.4Ghz (266FSB x 13)

My other question is, if i did have the PC 8000 = DDR2 1000 MHz = 500 MHz memory and only running the FSB at the standard 266 would it still be better to have the 1:1 ratio? and if not what would be a better ratio and why?

Thanks for your help


and hi btw

 

[Assimilator1]

It's not that old

If your gonna fork out for higher speed RAM which runs upto 500MHz then theirs no point running it at 266MHz (via a 1:1 ratio),you just as well stick with your old RAM.
With DDR2 1000 You either want to run the RAM/FSB ratio at 2:1 on the std FSB of 266 giving you 532MHz for the RAM (which is a slight overclock, maybe you could lower the FSB a little to keep it in spec?) ,or better still chose a 1:1 ratio & whack the FSB upto 500MHz ,assuming your mbrd can do that.

What spec RAM have you got atm?

Hi back btw

 

[Noobody]

i am more confused after i read all these post, thanks guys any way

if you have $$ to get QX6700 and pc8000, would it be possible run 5Ghz @ 500Mhz and 4Ghz @ 400Mhz?

 

[atlr]

cRaZyMiLk,

Check out this article

 

[Roguestar]

Originally posted by: Noobody
i am more confused after i read all these post, thanks guys any way

if you have $$ to get QX6700 and pc8000, would it be possible run 5Ghz @ 500Mhz and 4Ghz @ 400Mhz?

Um, long story short, no.

PC8000 would let you in theory run a FSB of 500 instead of the standard 266 but there's no motherboard or HSF that could stand that.

 

[DoubleDigits]

Hi guys, Im new to the forums and ive found this post and replies along with others very helpful and i believe now I have a good grasp on how to OC abit.. But before I dive into buying anything for my upgrade I just wanted to make sure I am getting the right idea here..

I want to get a E4300 and OC it like everyone else . I will be putting it into a DS3 mobo but again like most ppl here im not sure what kind of ram speed to get.

I would like to see my E4300 OC to 3ghz and id be happy. To get to 3ghz if I have understood everything I would need to get a 333FSB right? Now with this 2:1 or 1:1 ratio thing.. what is better? im lost on that part.. I thought 1:1 was ideal.
So then I should get a E4300 OC it to 3ghz and pair it up with DDR667 ram to meet the 333fsb and that would be a 1:1 ratio?

My other question is would it be a better idea to just buy DDR800 ram and downclock it to 667 and then run it at 400 later? I ask only b/c ive been told its possible to get the E4300 up to a 400fsb where then I would be better off with DDR800 so I dont have to OC the 667 ram? Or would it just be better to buy a E6300 and say me the headache and get an easier OC?

Sorry for the long winded post, I just want to make sure im totally understanding this OC thing.

Thanks everyone though for posting ealier it made understanding OCing easier.

 

[Roguestar]

I replied to your thread in General Hardware, a good idea is to search for "memory guide" and you'll find a thread called "Core 2 Duo/DDR2 memory guide", which although it hasn't been updated specifically for the E4300, still contains the basics and some really good offers. I think you should get a good pair of DDR2-800 sticks from that thread so you have the option of overclocking even if you drop a better processor in further down the line.

 

[Assimilator1]

DD
Ref your 1st question ,yes.
2:1 or 1:1 depends on what FSB your running & what RAM you have.
With a 333FSB ,at 2:1 you'd need DDR2 1333 ,which if it exists would cost a fortune
DDR2 667 will work fine at 1:1 ratio but wouldn't leave you much headroom if your CPU/mbrd can go higher (depending how well the 667 o/cs).DDR2 800 would allow for a higher o/c or if stuck at 333FSB you could quite likely set tighter RAM timings at that underclocked speed for slightly better performance.
DDR2 800 is the best choice really.

Btw a 6300 would be harder to overclock because you'd need a mbrd which is capable of much higher FSB.

 

[DoubleDigits]

after reading the memory guide and both your comments, thank you btw for that. I have decided to get DDR800 just for the fact like you said there is much more head room if I wanted to go higher.

thanks again guys!

 

[aka1nas]

If I were to get a 650i-based board could I then just run the memory with a divider and go with DDR2-667 and an E4300? I.E. set a 1:2 mem divider and run at 400FSB to end up with about the same memory speed as stock?

 

[Vlip]

This thread has been very helpful. I am new to overclocking and have no idea where to start. I have just purchased the following:

C2D E4300
Gigabyte GA-965P-DQ6
2X1GB Corsair XMS2
Saphire X1950XT 256MB
Stock cooler (for now)
Antec Sonata II case with 450W psu

I would like to get to 3.0 to 3.3 GHz.

Has anyone out there got some suggestions of where I could start? Or, better yet if anyone has a similar system and has successfully overclocked, could they share what settings they are using?

Thanks!

 

[Assimilator1]

Hmm ,you need to read a general overclocking guide 1st ,I was gonna link you 1 from here but I can't see one ,I don't think the mods would appriecate me linking to another forum either

Basically it involves upping the FSB to get your CPU running faster ,you'd most likely be able to jump straight to 2.4GHz (266FSB) & then increase your FSB in small steps (say 5MHz) ,doing a quick 5min test with Prime95 before moving upto the next step.
This thread covers the RAM settings ,& you'll want to study the mbrd manual closely on the relevant section.

 

[Vlip]

Thanks for that Assimilator1. I have read a number of guides but still have some questions. I get the part about upping the FSB in small steps but at what point do you start fiddling with VCore? Do you start upping VCore when the system will no longer boot? Also, I've heard conflicting advice about RAM. I understand that the default mobo setting is 5-5-5-18 at 1.8V and that I need 2.1 to 2.2V to get the 4-4-4-12 timing I paid all that extra money for but in some cases I've been told to leave the default timings and voltages until I've found the cpu's max and in other cases I've been told to set the RAM timings and voltage up front. What do you advise?

Thanks again!