Overclocking a xeon e5450 beyond 3ghz

alphadogg123 · Jan 20, 2016

Hey guys I just bought a xeon e5450 hardmodded to fit in standard 775 boards to replace my even more obselete conroe e6600 core 2 duo. I was hoping to get an overclock between 3.2-3.6ghz but can only get upto 3.078ghz which is quite pathetic. When I set the bus speed past 342mhz(multiplier is 9) in the bios it wont boot.

Can anyone help me out with any tips or diagnosing my bottleneck?
I do appreciate this is an old system but its ideal for me as it sits in a unused room and renders.

The system I'm running is micro atx so of course the components arent great but heres the spec:

I'm running a GA-G41MT-S2P which I had to patch with xeon microcodes to get sse4.1(and probably other features) working.
I'm assuming my ram is the issue its corsair memory from scan which I bought years ago to last me till I upgraded to an i5 system. its 1.50v memory and I dont know if that is an issue with the overclocking I'm attempting.
http://www.corsair.com/en-gb/cmx4gx3m1a1333c9
I have 3 power supplies I can use a 550w xclio bronze rated, cheap atx-500(non rated) and a 650w corsair gold rated power supply. So far I've only tried the xclio and cheapo atx-500 but intend on trying my better corsair.
The cooler is a POC. Very old air cooler with fresh thermal paste that runs at 65-70c when cpu is stressed.
Using the built in graphics as I dont have a spare graphics card currently.

Heres the benchmark I did at my current overclock help me beat it.
http://browser.primatelabs.com/geekbench3/4972873

Ironsounds · Jan 20, 2016

Hello... Yes on a S775 board your FSB is very limited... the multiplier is set at 9 and that is your limiting factor, can you get 9.5-10?
You also need to down clock your memory as you increase the FSB, your memory will be out of clock sync with some settings so try one or two higher on next attempt... reset/clear bios if you get into boot trouble.

You could try and raise the Voltage on the MCH/north bridge, add cooling/fan, mod heatsink... but you will be un-happy with the final results for your efforts.

alphadogg123 · Jan 20, 2016

Ironsounds :

So far the bios setting I have changed are turning ec1 off and changing the cpu bus speed, have tried turning up the vcore but higher voltages still prevented booting when I tried turning up the cpu bus speed.
The e5450 has a locked multiplier, there is an option to add 0.5 to the mutltiplier but the setting doesnt seem to work.

There is a video of a guy here with the exact same board getting 3.2ghz so annoying.
http://www.gigabyte.com/products/product-page.aspx?pid=3743#ov
https://www.youtube.com/watch?v=AZ1Wq1eYwLI

Ironsounds · Jan 20, 2016

Hello... Ya FSB overclocking sucked, it screws with alot of data path clock signals... now we got better ways with the "K".
The S775 cpu's were only 333mhz, the multiplier is the key.

alphadogg123 · Jan 20, 2016

All skylake cpus can be non multiplier overclocked so get used to it lol http://www.eurogamer.net/articles/digitalfoundry-2015-locked-intel-cpus-can-now-be-overclocked

my memory is just running at single channel with one stick does this make a difference?

Ironsounds · Jan 20, 2016

Hello... that is normal you have one stick installed... for testing FSB speeds it might be best... what freq and CL you got the memory running at now?

alphadogg123 · Jan 20, 2016

I can get it to run at 343 but running at 342mhz which is 3.078ghz.
I think I answered my question here

http://www.tomshardware.co.uk/forum/265037-29-g41m-combo-overclock-problem

Ironsounds · Jan 20, 2016

Hello... Yes I agree... the combo ddr2/ddr3 memory controllers were bad... I had a gigabyte G45 DDR2 and thought I could get 360's FSB on it... my memory could be wrong? was quite a while ago.

alphadogg123 · Jan 20, 2016

Ironsounds :

My brothers asus g41 will do 3.6ghz on a dual core e8600 which has a 10x with the asus over clocking option of +10%

Ironsounds · Jan 20, 2016

Hello... Yes that seemed to be the final frontier... 3.6GHZ / 10 = 360fsb... ya I remember B ) Q9650 here... Now I E3 1240 V2 http://www.cpubenchmark.net/cpu.php?cpu=Intel+Xeon+E3-1240+V2+@+3.40GHz
and don't worry about overclocking. B )

http://www.ebay.com/itm/Intel-Xeon-E3-1240-v2-SR0P5-3-4-GHz-8MB-Quad-Core-LGA-1155-WITHOUT-FAN-/351615788629?hash=item51ddef2655:g:qFMAAOSwYHxWJ8LI
find a new/used 1155 Mb and your set.

alphadogg123 · Jan 30, 2016

I just changed my mobo to an asus p5g41t-m lx and that has a much higher fsb wall of 391mhz and allows me to add on upto 150mv.
New overclock is 3.52ghz I would have liked 3.6 but my overclock is where I want it to be and my benchmark score is a bit lower than it should be as Im only running my memory in single channel currently.
http://browser.primatelabs.com/geekbench3/5043796

Im very aware that I could get 4ghz+ on a atx board but I'm happy with my micro atx form factor.

BBA___ · May 11, 2016

alphadogg123 :

lol, I have got and awesome overclock on Asus P5Q Pro + Intel Xeon E5440, im using it now on 3,5Ghz(Default 2,83Ghz), Multipler on 8,5 , Voltage on CPU is on default, Ram Voltage is default as well, FSB

RAM 1:1 and CPU is with stepping C0. Works with no errors and C1E is disabled!

BBA___ · May 11, 2016

alphadogg123 :

Hey guys I just bought a xeon e5450 hardmodded to fit in standard 775 boards to replace my even more obselete conroe e6600 core 2 duo. I was hoping to get an overclock between 3.2-3.6ghz but can only get upto 3.078ghz which is quite pathetic. When I set the bus speed past 342mhz(multiplier is 9) in the bios it wont boot.

Can anyone help me out with any tips or diagnosing my bottleneck?
I do appreciate this is an old system but its ideal for me as it sits in a unused room and renders.

The system I'm running is micro atx so of course the components arent great but heres the spec:

I'm running a GA-G41MT-S2P which I had to patch with xeon microcodes to get sse4.1(and probably other features) working.
I'm assuming my ram is the issue its corsair memory from scan which I bought years ago to last me till I upgraded to an i5 system. its 1.50v memory and I dont know if that is an issue with the overclocking I'm attempting.
http://www.corsair.com/en-gb/cmx4gx3m1a1333c9
I have 3 power supplies I can use a 550w xclio bronze rated, cheap atx-500(non rated) and a 650w corsair gold rated power supply. So far I've only tried the xclio and cheapo atx-500 but intend on trying my better corsair.
The cooler is a POC. Very old air cooler with fresh thermal paste that runs at 65-70c when cpu is stressed.
Using the built in graphics as I dont have a spare graphics card currently.

Heres the benchmark I did at my current overclock help me beat it.
http://browser.primatelabs.com/geekbench3/4972873

Your problem could be in RAM, which can be bad for overclocking or in a bad motherboard.Who knows

alphadogg123 · Aug 25, 2016

Problem is not ram just the lack of bios options lol
I bought a g41 board with micro ATX form factor that will also take ddr3. DDR3 makes a difference in modern applications with SSDs but didn't make a difference at the time of release.
There are p45 boards(with loads of bios options) which will take ddr3 but I don't think there are any in the micro ATX form factor.

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