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Doubling FSB with E5200 wolfdale

Forum Overclocking : General Discussions - Doubling FSB with E5200 wolfdale

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hydrochloric   05-14-2009 at 08:12:02 PM

Hey everybody,
I was just theorizing about how to get the most out of this:

Intel Pentium E5200 Wolfdale 2.5GHz
http://www.newegg.com/Product/Prod [...] 6819116072

Now it runs with an 800MHz FSB and a 12.5 multiplier stock.
But since I'm pairing it with 2 sticks of:

G.SKILL 2GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
http://www.newegg.com/Product/Prod [...] 6820231121

and this:

GIGABYTE GA-EP45-UD3R LGA 775 Intel P45 ATX
http://www.newegg.com/Product/Prod [...] 6813128359

I would like to get my FSB to 1600 to maximize ram performance.
However I would also like to keep my CPU under 3.0GHz.
To do this I would have to drop the multiplier to 7.5 or lower.

Will a 5 point multiplier drop be alright with my CPU performance?



(or am I completely confused and my ram will only handle 800 not 1600)

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MaDMagik   05-14-2009 at 09:12:05 PM
- 1 +

In short: everything is easier to understand if you operate on base clocks( Fsb 800 really runs at 200MHz, ddr800 ram runs at 400Mhz, if you want to know why than google Quad Pumped FSB nd DDR respectively)

As for e5200, its higly unlikely that it will go beyond fsb 333mhz, mine maxes out at 330mhz. Remember its a budget chip.

But all in all, however you set your ram to run, its noit going to make any real difference. Have a look at this thread http://www.tomshardware.co.uk/foru [...] _12_0.html

Reply to MaDMagik
HundredIslandsBoy   05-14-2009 at 10:27:29 PM
- 0 +

I've tried over and over to overclock my e5200 on two Asus motherboards capable of fsb 2000. I could not get the e5200 to 1333, would not even post. It's completely stable at 1066 24/7 at the same volatge as on stock speed 1.2 vcore!
On the stock Intel HSF both cores "only" goes to 61 C after 30 minutes of Crysis, Far Cry 2.

Reply to HundredIslandsBoy
hydrochloric   05-15-2009 at 12:29:36 AM
- 0 +

Interesting, I didn't even think about clock speed limitation on the chip.

Do you think I would see any appreciable difference from running Asynchronously?
say a 266 clock and a 3:4 ratio? (or even a 2:3 ratio?)

Reply to hydrochloric
apache_lives   05-15-2009 at 03:49:28 AM
- 0 +

Doubling the FSB would double the clock speed -> 5ghz on an E5200 is unheard of on any air or water cooling, even an 8 series would struggle to see past 4.3ghz even messing with the multiplier to get there

Better option - set the ram for 1:1 if you can and clock it up that way to get the max out of it (so in the end its the cpu thats maxed, not the ram or motherboard), and as for higher ram speeds, anything beyond 1:1 ratio (eg 800 fsb with 1066 ram) wont see any benifits or minimal at best.

------------------------------ Q6600@3510/1560 + TT BigTyphoon+Mod
8gb Kingston 800mhz
Gigabyte EP35-DS3P
XFX 8800GT/512
 Reply to apache_lives
djclark25   05-15-2009 at 09:56:06 AM
- 0 +

If you do want to get a CPU that can run on double FSB then try to get hold of a E2220.

I have one and am currently running it at 1600FSB with a x8 multiplier to get 3.2Ghz stable.

Reply to djclark25
HundredIslandsBoy   05-15-2009 at 11:18:49 AM
- 0 +

You will definitely see a difference running that e5200 from stock 2.5 GHz to 3.3 GHz on a 1066 bus. Just leave your RAM at stock settings for a 2:3 ratio as you'll have to underclock it if you want 1:1 which will slow down your system in this case.

Reply to HundredIslandsBoy
eagles453809   05-15-2009 at 08:34:24 PM
- 0 +

um...apache_lives...my e8500 does 4.5 with ease as most do with a vcore bump...the 5/7 series have trouble.

Reply to eagles453809
hydrochloric   05-15-2009 at 09:33:40 PM
- 0 +

Apache, I don't want to straight up double cpu speed. I want to double clock speed.
But as Magik pointed out I'll probably never get past 333.

What I'm wondering now is if running an asynchronous system is a good idea?
(I've never done it before)



Oh, and THANKS EVERYBODY! I appreciate the help.

Reply to hydrochloric
aaronuflaw   05-16-2009 at 05:00:26 AM
- 0 +

I tried doing exactly what you said. It seemed to me to get a good 1:1 ratio with the ram (800 Mhz), I wanted to set the bus to 400 Mhz (1600 Mhz FSB). If I did that, I knew my E5200 would not run at 5 Ghz, so I planned on reducing the multiplier to a more reasonable 8 (3.2 Ghz). This would make the FSB mesh well with the ram and allow my ram to use its full capabilities, all the while giving me a nice overclock. However, I have not been able to make this work, and right now I have my E5200 at 266 x 12.5 for a 3.33 Ghz system. My ram is still running at 800, but has a divider and is not running at 1:1 ratio.

Reply to aaronuflaw
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