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My CPU is underperforming


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#1 andre_

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Posted 09 February 2009 - 05:58 PM

I'm using a GA-945p-s3 (rev 3.3) motherboard and running an e6750 2.66ghz core 2 duo. The trouble is when I check the cpu speed it never goes above 2.1ghz, and that's when it's being pushed hard while playing online games. Someone pointed out to me that this mb only supports a fsb of 1066mhz.. They then told me to update my bios since it would allow it to support fsb up to 1333mhz. (http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ProductID=2475)
After doing this the max output from the cpu I can achieve is 2.5ghz. I've tried a million tutorial to increase the speed of the cpu but nothing works. Everytime I reboot the settings go back to default. I'm running 4gb of cheap ram (Corsair VS1GB667D2
1GB DDRII-667 (PC-5300 ) Value Select 128MBx64non-ECC, 240-pin DIMM, Unbuffered, CL5), someone on overclockers.com.au told me that the ram may be getting pushed too hard and not allowing it??
I dont know about this since Ive read threads of people oc'ing quad cores while using the exact same ram as this.
My feeling is it's the mb. What do you guys think?

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#2 the_patriot11

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Posted 09 February 2009 - 11:47 PM

its not your front side bus, Intel CPUs have sort of a limited FSB anyway, it should run the full clock speed even at that FSB and I doubt your rams holding you back. a bios update couldnt hurt. what version of windows are you running? this actualyl could be a setting issue, if vista click start, control panel, system maintanence, power options, change plan settings, click change advanced settings, processor power management and check the maximum power state/minimum power state setttings. Most CPUs have a scaling option that when your not running the CPU full power it doesnt run it full power and its possible that the maximum setting got bumped down, it should read 100%. also, do you have all your drivers installed? if you know how to flash a bios it couldnt hurt, but if the motherboard was designed to be compatible with your CPU then it should read it full power, there should also be a button within the bios that says load defaults or load optimal system settings, that should fix it if somehow a setting within the bios was messed up accidently. also, what are you using to measure the CPU speed, if its just the windows CPU speed, then it will automatically show it as lower once you leave the game, so it might not be a problem at all.

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#3 dpunisher

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Posted 10 February 2009 - 02:50 AM

Only the latest version of the board (revision 3.3) supports a 1333 FSB.

Go into the BIOS and get to your CPU settings, or download/run CPU-Z and post that. Check your FSB, and your memory divider settings. Memory at stock speed should be 666-667, CPU FSB at ~333, multiplier at 8. 333X8= 2664 CPU mhz, 333X2=666 memory speed. You can temporarily disable CPU scaling in BIOS to run the CPU at it's 8X multiplier fulltime for checking your speeds.

E6750s are usually good for 3.2ghz+ by simply bumping the FSB to 400 and going from there. Not sure on your board, but you might be able to run asynchronus FSB/memory speeds ie FSB at 800 and memory at 667 (a 1.2 FSB/MEM divider).

Edited by dpunisher, 10 February 2009 - 02:52 AM.

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#4 andre_

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Posted 10 February 2009 - 03:31 AM

Thanks for the replies..

this is driving me crazy. No matter what settings I change it always goes back to default settings, and yes I am hitting f10 and saving the settings.

Let me show you a couple of pics I took so you can see what's going on. This first one is what happens no matter what changes I make. No matter how I tweak it it always returns to this....

Posted Image


The only change with this one is that CIA2 which allows me to change it up to "Full Thrust" which is the highest setting. This is the ONLY setting it will allow me to keep, without changing it back. When Im playing an online game and this is on "Full Thrust" and Ive got cpu-z opened on my second monitor I can see that occasionally it will jump up from 2.1ghz to 2.5ghz, but this is still short of the stock speed, let alone an overclock.

Here is what cpu-z says about my cpu:

Posted Image

And my ram:

Posted Image


I guess Ive changed something cos when I check cpu-z now it says 4:4:4:12:16?? These pics were from last night when I was following the advice from someone on overclockers.com.au


Here's what cpu-z says when it jumps up from 2.1ghz to 2.5ghz while im playing online games. It only does this for about 1-2 seconds at a time, and it only does it every 12-15 seconds:

Posted Image

Im really thinking its the piece of crap MB. On this pic you can see it says "Rev A1" Does that mean it's rev 1.0?? Because on the motherboard itself it says rev 3.3, and this version, which I updated a couple of months back says it should have a fsb of 1333

Thanks for any feedback guys.

Edited by andre_, 10 February 2009 - 03:31 AM.


#5 dc3

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Posted 10 February 2009 - 03:37 AM

If you make changes in the BIOS and they revert back to the default settings then you need to replace the CMOS battery.

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#6 the_patriot11

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Posted 10 February 2009 - 03:54 AM

yeah good sign of a bad CMOS battery, but is it possible your game just isnt maxing our your CPU?

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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

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#7 andre_

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Posted 10 February 2009 - 04:07 AM

It's call of duty 2 online, it can get pretty frantic, so Id be surprised if it didnt go above 2.5ghz. Ive checked it while using photoshop and while burning dvd's and watching movies at the same time etc.. it just never goes above 2.5ghz. The thing that is frustrating is I cant manually change it the way I should be able to.

Ill see about getting a new battery and let you guys know the results...

Thanks a lot for your quick responses btw I really appreciate it.

#8 the_patriot11

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Posted 10 February 2009 - 04:09 AM

COD2 is kind of an older game, it might not fully utilize the CPU but I could be wrong on that. Ive only played it on my xbox.I know the original COD wont even max out the 1.8 ghz amd turion on my laptop most of the time. but I dont know for a fact the Cod2 wouldnt.

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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

If I don't reply within 24 hours of your reply, feel free to send me a pm.


#9 dpunisher

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Posted 10 February 2009 - 04:11 AM

Enable CPU host clock control, enable OC FSB 1333. Get CPU to 2.66 (333X8), tweek memory multiplier (if needed) to get your memory to 667.

Edited by dpunisher, 10 February 2009 - 04:12 AM.

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#10 andre_

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Posted 10 February 2009 - 05:13 AM

Just checked the speed while playing call of duty 5 and gta4 and it's the same story..

dpunisher the problem is not changing the settings, the problem is the settings don't stay.. they always revert back to default settings after it reboots.

I will follow dc3's advice and replace the battery..

I'll let you guys know the outcome tomorrow..

Cheers.

#11 fairjoeblue

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Posted 10 February 2009 - 10:06 AM

If you go to the Gigabyte website for your motherboard, GA-945p-s3 (rev 3.3) , & look at the CPU support list for the e6750 it states "(Run at FSB1066 MHz)" .



Even with a BIOS update the 1333MHz FSB isn't "officially supported" .

You can take the memory factor out of the mix.
The speed of the memory will affect overall performance but should not affect the speed/front bus of the CPU.

Since you have a CPU with a FB of 1333MHz & the motherboard only auto supports 1066MHz your best bet would be to go into the BIOS , disable "speedstep" & EIST & overclock the CPU as much as possible with "stock" vcore voltage.

I have a E6700 2.66GHz\1066MHz running at 3.2GHz\1280MHz @ 43C idle .
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#12 andre_

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Posted 10 February 2009 - 05:12 PM

Hey thanks fairjoeblue..

That's exactly what I was thinking, that even though when I updated the bios it would technically allow speeds up to 1333mhz, it would still be very limited. I'll do what you said this evening. Somehow I think I've done that already in the past. If that fails I'm just going to get a new mb and be done with it since I'm 99% sure this is the issue.

Thanks.

#13 fairjoeblue

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Posted 10 February 2009 - 07:29 PM

Your CPU has a real FB of 333.25 ["quad pumped 333.25 X 4 = 1333] & a multiplier of 8 [333.25 X 8 = 2666 or 2.66GHz].

A 1066MHz front bus CPU has a "real" FB of 2.66.5 .
Since Intel locks the FB you can't raise that so 266.5 X 8 = 2132 or 2.13GHz which is what your CPU will run at with "Auto" settings.

Go in the BIOS & if you can manually set the CPU set the multiplier to 8 [highest it will go] & the front bus to 333.25 .
If you are only able to OC by percentage go with 25% .
Save & exit.

If your memory &\or video doesn't bottleneck the overclock you should be running at pretty close to actual "stock" specks for a E6750.

That really isn't much of an OC but if the unit won't boot you'll have to go back in the BIOS & lower the front bus a little at a time until it boots & is stable.
[Sometimes that involves clearing the CMOS & resetting everything.]
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#14 andre_

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Posted 11 February 2009 - 01:39 AM

It's OK it's still not working..

I'm just going to buy another mb right now and be done with this issue once and for all..

Thanks for your replies everyone.

#15 andre_

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Posted 11 February 2009 - 01:48 AM

By the way am I gonna have to reformat when I change the mb?

Im using an oem version of xp. is it going to get all weird that Ive got a different mb?




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