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About ram to fsb ratio. - Page 2

post #11 of 21
Quote:
Originally Posted by psylor View Post
mmmmmm snappy
+2
post #12 of 21
Quote:
Originally Posted by jones245 View Post
Using everest i did bench it before as you can see some numbers are higher while others are lower










To summarize it for those that cannot read, as seen in the 2 pictures. The one with the higher ram speed had a higher score obviously but scored lower on the L1 and L2 cache categories compared to the one with the lower ram speed at 1:1 ratio.
You are also changing fsb speed which affects cache speeds, ram settings shouldn't have anything to do with cache speeds.

This is how my memory runs with 1:1 and 5:6 dividers, notice that cache speeds don't change





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post #13 of 21
Thread Starter 
Quote:
Originally Posted by mm67 View Post
You are also changing fsb speed which affects cache speeds, ram settings shouldn't have anything to do with cache speeds.

This is how my memory runs with 1:1 and 5:6 dividers, notice that cache speeds don't change




I couldn't do anything about it.

My ram cannot run at that high of a speed without the PC BSOD.

My dfi dk x48t2rs is not able to keep the fsb speed at the same while changing the ram speed. I'm not sure why nobody is aware of this.

I however have quite a range of dividers to choose from but sadly non of them enable me to keep fsb the same while increasing ram speed. If i want higher ram speed fsb speed HAS to increase.

I guess the DK series of Dfi is like this? Higher pci-e speed at x16 but lower OC capability compared to other x48 series like say LT? I'm not really sure.
post #14 of 21
Thread Starter 
Quote:
Originally Posted by kpo6969 View Post

I managed to find a divider to replicate your OC settings. Fsb of 415 while ram runs at 1100mhz.

Using a divider of 400/1066 i managed that.

Cpu speed at 3.74ghz multiplier at x9. Ram speed at 1100mhz. I ran resident evil 5 bench with the same gpu Oc speed of 930mhz and 1160mhz and it's a lower score so i guess performance on games decrease?


post #15 of 21
Thread Starter 
Quote:
Originally Posted by kpo6969 View Post
a) offering a comparison
b) fill in your system specs so those of us that do read would be of more help


Firstly do u actually read?

I wrote in this thread i own a DFI DKx48 t2rs mobo with an E8400 cpu and team xtreme dark 1066 rams.


Unless nobody in here knows how a DK series mobo from dfi is like it has a series of fsb to ram combos to choose from.

Wat else u need to know? From the pictures of the RE bench i posted it shows i'm using a 5900 series card from ATI/AMD.

Only one card card is from the 5900 series and it's the 5970 so what else you need to know sherlock?


I apologise if i wasn't specific enough since i thought this is a very specific forum. It's an overclocking forum for computers, therefore ppl should know their hardware yes?
post #16 of 21
Quote:
Originally Posted by jones245 View Post
I managed to find a divider to replicate your OC settings. Fsb of 415 while ram runs at 1100mhz.

Using a divider of 400/1066 i managed that.

Cpu speed at 3.74ghz multiplier at x9. Ram speed at 1100mhz. I ran resident evil 5 bench with the same gpu Oc speed of 930mhz and 1160mhz and it's a lower score so i guess performance on games decrease?


There is no point to comparing memory speeds if you change the speed of cpu also. Naturally your system will run faster at 4.1 GHz than at 3.7 GHz regardless of memory speed.
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post #17 of 21
Thread Starter 
Quote:
Originally Posted by mm67 View Post
There is no point to comparing memory speeds if you change the speed of cpu also. Naturally your system will run faster at 4.1 GHz than at 3.7 GHz regardless of memory speed.


Okay but would u say it's better to sacrifice a bit of cpu speed for higher ram or higher cpu speed for lower ram?

I cannot keep my fsb the same if i change my ram speed.

My dkx tsr2 mobo from DFI doesn't have that feature.
post #18 of 21
run maxxmem and go with the higher overall score.
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post #19 of 21
He meant http://www.overclock.net/specs.php to fill that. It is easier to answer your questions that way because we don't have to try to find your specs everytime.

Ram speeds don't affect L1/L2 caches. If you can't get higher ram speeds without higher fsb that means you are already using the divider which makes the ram speed the fastest.

The myth of 1:1 divider is not actually true anymore. It is not more efficient than others. FSB strap speeds have something to do with the efficiency of the ram dividers.

Read this for very good information.
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post #20 of 21
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Originally Posted by jones245 View Post
Okay but would u say it's better to sacrifice a bit of cpu speed for higher ram or higher cpu speed for lower ram?

I cannot keep my fsb the same if i change my ram speed.

My dkx tsr2 mobo from DFI doesn't have that feature.
I'd say no, you won't gain anything from higher ram speed, cpu speed is more important. Choosing optimal fsb/multiplier ratio to run your memory at max speed might help a little bit, I for example could run 4 Ghz using 8.5 * 471 or 8 * 500. Out of those 8 * 500 is slightly faster because I can run ram at full 1200 MHz speed.
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