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How to overclock amd phenom ii 1045t

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September 3, 2012 6:45:28 PM

I'm using a Biostar A880GZ MOBO. Really dunno what to do here.
a c 174 à CPUs
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September 4, 2012 12:46:18 AM

The 1045t has a locked multiplier, like my 1055t, i turned the clock multiplier to wat i wanted to go to, then down clocked the ram a little around 1333 or 1066. and keep HT 2000 to 2200, and a CPU-NB under 2500 in the bios if u can do that
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September 4, 2012 12:47:10 AM

When moving the clock multiplier move it and test with intel burn test and see if its stable in small increments.
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September 4, 2012 1:06:39 AM

FSB 250 the best :D 

250x13.5 = 3.3Ghz

You have a Flat HT 2000 (250x4) and you can still select the stock ddr3 1333 ram speed (1066 became 1333)
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September 4, 2012 1:58:59 AM

Cut and paste from one of my posts in another thread....

I have my 1045t OC'd to 3.4 Ghz with all 6 cores running. It could go higher but, I'm limited by heat because I can't fit a bigger cooler in my case.

I recommend getting some free software first. CPU-Z and HWmonitor, and prime95.

CPU-Z will show you frequencies, voltages and ram timings.

HWmonitor will show you temps. *Be warned* HWmonitor was showing my core temps 10 degrees lower than they actually were. The temp labeled "TMPIN2" was actually tracking perfectly with the core temps shown in AMD Overdive. So look for the highest temperature other than your video card. (many video cards can safely run at hotter temps than your CPU.) The hottest one on my Gigabyte 990 fxa ud3 (other than the video card) is the core temp. Try to keep it below 55C under full load.

Prime95 is the program that will stress test your computer to see if it can remain stable and cool under load. 2hrs of the blend test with no errors and no overheating is a general rule of thumb for a stable OC.

Now for the fun stuff.

Go into your BIOS and lower the multiples for your CPU and your Ram by a few steps. (The 1045t won't let you increase the multiplier above stock)
Then disable turbo (aka "core performance boost" )
Then find your CPU Host clock control and set it to "manual"
Then You should be able to change the "CPU Frequency" (I'll call it FSB) (This is before the multiplier, so it will be low. Mine started at 200)
Now increase that variable by a bit.

I recommend balancing your FSB and your "memory clock" (RAM) multiplier to a point where your ram is back down to stock speeds after you bump the FSB. So raise your FSB to something like 250 then adjust your RAM multiplier down so that your RAM us running at or near stock speeds.

Now move on to your CPU clock ratio. With the faster FSB, you will be able to run your CPU at higher frequencies with a lower-than-stock multiplier. I eventually took mine all the way back up to 13.5 with a final frequency of 3.4 Ghz.

I would recommend starting with a lower multiple that gets you just a couple hundred Mhz boost over stock at first. Then test for stability and heat. Run prime 95 for at least 30 minutes if you want to see your hottest temps. The blend doesn't get things hot until about the third bank of tests.

If things look good, go back into the BIOS and bump the multiplier some more and re-test.

My MB got rather ambitious with the voltages when I left it in auto, so use CPU-Z to keep an eye on core voltages. Many recommend just staying under 1.45 volts. I recommend not going any higher than you need to for a given clock speed. This will help keep heat down. I ended up using a negative offset "CPU voltage control" of -0.075 volts. This brought my core voltages down to about 1.344v at full load.

*note* I'm scraping the floor on voltage with my particular chip/speed. One notch lower and I get BSOD. You may be able to go a little lower or you may need a little more voltage for your chip and clock speed.

Now just test and adjust and repeat.

Generally speaking:

BSOD means you need more voltage, and/or less speed.

Overheating means you need less voltage and/or less speed. (or a better cooler for your CPU.)

If you get to the point where your temps are good and your computer is sable, and you still want to go faster (than ~3.4Ghz), you can go back and bump up the FSB. But remember to adjust your RAM multiplier back down to stock-ish speeds.

You can OC your RAM later, but that gets a little more complicated as you may have to adjust CAS timings and RAM voltages to make it work. Keeping your RAM at stock speeds should give you one less thing to worry about while you probe the limits of your CPU.

Good luck!
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September 15, 2012 10:50:38 PM

I'm also using an A880GZ mobo w/ 1045T, and I just can't find where to set the cpu clock ("FSB"). I swear I've looked under every rock in the BIOS, and I've gotta be missing something. I'm assuming it should be on the "AMD Pstate Configuration" page, where I can set Custom Pstates to Enabled, and then change the multiplier, etc. I see Core FID, Core VID, Core, DID, NB FID, NB VID, and that's it. If anyone has any tips for this board, I'd love to get your input -- I'm stuck at stock at this point, and I'm really hoping I can go over 2.7GHz (I know, this board isn't ideal for OC, but I'd *at least* like to get up to 3.0, if possible). Thanks!
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September 16, 2012 1:30:05 AM

It may also be called "base clock".

The default is 200, so if you see that number somewhere on your list, that's probably the one.

I just downloaded a copy of your manual and couldn't find any BIOS screen shots to go from.
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September 16, 2012 3:27:49 PM

That's exactly what I was looking for, but couldn't find it. I'm attaching some shots of the relevant BIOS screens... let me know if something stands out.





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September 16, 2012 10:05:34 PM

I don't see anything in those screen shots that would seem to do what we want.

Try changing some of those "auto" settings to "manual" and see if any additional options pop up?

Remember to change each back to auto after you check it.
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September 28, 2012 9:10:32 PM

Hi zinonly, i clocked my cpu, which is the same one you have to 3.4 on stock cooling and got these results on hwmonitor.




the max is the peek of what my test did i believe. My question is. is it safe to stay at that speed on stock cooling? or should i under clock it a little more?
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September 29, 2012 12:20:27 AM

Two problems with what I see there.

First, it seems your Vcore is almost 1.5 volts. That's at the extreme end of the Vcore window. Some people think that high of a voltage can shorten the life of your chip.

Second, 65C is too high. You can damage your chip quickly at that temperature.

Try lowering your Vcore to see just how much voltage you need to stabilize. It's very likely that you don't need near as much voltage as you are using. I stabilized 3.4Ghz at 1.344v. You may be able to do it with less or you may require a little more. Don't run any stress test long enough to get to 60C. Consider going back to stock settings until you improve cooling. Once you upgrade cooling shoot for a max temp of 55C or less.

Some affordable cooling options are the TX3 for smaller cases and the 212 evo if you have the space. Both are made by cooler master.

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September 29, 2012 11:28:30 AM

So i lowered my cpu vcor, it said in bios 1.425 normal, i went and dropped it to 1.350. and here i am,



I also went ahead and turned of the core performance boost and for some reason my game felt smoother hehe, maybe its just me, What can i try now or should i just wait for the new cooling fan im thinking of getting the tx3 you recomended because i have a mini atx mobo and case so its kind of cramped, another thing is there one that i dont have to remove plates and goes on with the brackets like the stock cooling?
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September 29, 2012 7:53:29 PM

That new picture looks like a carbon copy of the original that showed max voltage close to 1.5 and 65C max temps.

That's not the voltage and temps with your new settings is it?
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September 29, 2012 10:36:27 PM

I apologize i linked the wrong one, this one should be the correct one.

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September 30, 2012 1:06:01 AM

That looks good for idle.
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!