overclocking 1045t?

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grandpatzer

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So I finally built my cpu watercooling and now would like to consider selling my X4 and for a little extra cash buy the 1045t x6 thuban.

This is similar to 1055t but 100mhz less speed.

Question: can I achieve 3.8ghz at "safe" volts, something like ~1.5v


here is a picture of cooling, can click for bigger
 
The CPU-NB can take volts up to 1.25 (or less) for around 2600 and 1.3 for 2800,

the cpu itself for me is fine at 1.45v at 3.7ghz across all six cores. anything higher causes thermal issues on my hyper 212+. this is with turbo core off, c1e and cool'n'quiet on.

remember when first overclocking you need to find your max FSB on the mobo, the easiest way is to keep your ht clock at 2ghz, the NB at 2ghz, and try to keep ur ram around 1333mhz at cas 9 or something stable.

keep cpu at stock volts and go up 10mhz at a time until it wont post or pass stress tests like LinX, then increase voltage by a step. after a while you'll find a fsb that wont boot no matter what, and that is your max oc
 
boushidosan said:
The CPU-NB can take volts up to 1.25 (or less) for around 2600 and 1.3 for 2800,

the cpu itself for me is fine at 1.45v at 3.7ghz across all six cores. anything higher causes thermal issues on my hyper 212+. this is with turbo core off, c1e and cool'n'quiet on.

remember when first overclocking you need to find your max FSB on the mobo, the easiest way is to keep your ht clock at 2ghz, the NB at 2ghz, and try to keep ur ram around 1333mhz at cas 9 or something stable.

keep cpu at stock volts and go up 10mhz at a time until it wont post or pass stress tests like LinX, then increase voltage by a step. after a while you'll find a fsb that wont boot no matter what, and that is your max oc
Click to expand...

Thanks will do this, does NB overclock and overvolt help in achieving higher cpu speed?

I game in BF3 and want to decrease cpu bottleneck in cpu intensive games.
 
After you overclock your cpu, finding your max NB value will speed up memory read/access and latency

its overclocking your memory controller, so after you oc ur cpu you can get an extra boost from the NB overclock, but for the love of god dont let your HT get overclocked!

edit: also increasing the NB voltage can add stability to the system as well
 
It's been a while since I did any overclocking, but what does FSB actually mean on a NB-integrated CPU?
 
The NB also has a locked multiplier on these cpus, its 10x,

so you can overclock it by changing your FSB base clock. e.g. 280x10=2800mhz which is a nice setting for thubans, they have better memory controllers.

i had a sempron that would only run my 8gb vengeance at cas9 at 1333 (cas8 would freeze) but when i upgraded my cpu, my mobo automatically ran it at cas8 no prob
 
Sorry to resurrect the thread, but I was wondering if the HTT limit is due to a CPU or motherboard issue? For the life of me I can't get my 1045T/M5A78 combo to go over 215mhz, and I put the NB/HT/Memory all below 1000mhz.

Don't get me wrong, any OC is a bonus, but I was hoping for more than 2.9Ghz total out of a 2.7Ghz chip ;).
 
kirbyrj said:
Sorry to resurrect the thread, but I was wondering if the HTT limit is due to a CPU or motherboard issue? For the life of me I can't get my 1045T/M5A78 combo to go over 215mhz, and I put the NB/HT/Memory all below 1000mhz.

Don't get me wrong, any OC is a bonus, but I was hoping for more than 2.9Ghz total out of a 2.7Ghz chip ;).
Click to expand...

I'm on my work computer so I can't check my settings for my thuban and it was a long time ago I tweaked the settings so sorry going off memory here..

remember RAM settings show up in Bios at a 3rd of their rating if it'd DDR3, so 600 will really be 1800 etc. Check you have your RAM running at right speed and timings are correct. Disable turbo in Bios You should be able to get at least 3.5 ghz out of those chips without changing voltage. HTT Link should be around 2000-2200 higher than that can lead to instability

Can you take screenshots with CPU-Z if you still can't get above 2.9?
 
I put the NB ratio to x5 and the HT multiplier to x5. I set the memory to run at DDR400 speed so it had room to scale with an increased reference clock. I started at 200mhz and scaled upward, but I can only get to around 215-218 before I can't go any higher. I can get Windows to boot at 230 or so, but it won't be stable in LinX and will crash out after about 3 minutes. Also, it will crash out after the same 3 minutes if I go up to 220mhz.

But I'm wondering if it's a factor of a dud CPU or a dud motherboard. I'm not sure which controls the reference clock.
 
It's sort of funny, I have the same 1045T, Asus M5A78L-M LX Plus, and Crucial DDR3 1600. Got all mine from Micro Center. Anyway, I can give you some good advice I think for a decent overclock. Note I said decent, but not anywhere near the bleeding edge. It's a mild and simple overclock but will help.

Under the Advanced tab at the top you can go to the JumperFree Configuration.
Change CPU Overclocking to Manual.
Change the CPU/HT Reference clock from 200 to 240
Go down to CPU/NB Frequency and change that to 2400.
Change HT Link Speed to 2160
Change DRAM Timing Config to Manual
Change the memory clock speed there to 667
Now go to DRAM Timing Configuration
Change the appropriate numbers there to 9,9,9,24,37,2T
This was the step that you missed that caused you trouble. The numbers are the proper spec for this RAM running at 800 Mhz, which is 1600 effective. You can see these numbers in CPU-Z.
If you do not set these in the BIOS when you drop the memory divider, then the board will try to tighten up the timings. Meanwhile though you are overclocking and that pushes up the memory speed again, but the board is trying to run the memory at some tighter timings for the lower divider and it won't work. Hope that makes sense to you.

Now get out of this JumperFree menu and go to the one below, which is the CPU Configuration.
Enable Secure Virtual Machine, Cool n Quiet, and C1E. Do not enable Advanced Clock Calibration. No need since you have all 6 cores working. Many say to disable the power features like Cool n Quiet and C1E, but why have your cpu running at full speed all the time? This is a mild overclock so enabling these just keeps the power usage down and keeps the cpu cool.

That's it. Nothing else needs changed from an overclocking perspective. Save and exit.

This will put your RAM at 1600 with proper timings and the overall clock speed will be 3.24 Ghz. Not huge, but will help. Oh, and hope you left Turbo enabled. Since this was a mild overclock there is no need to disable it.

Check your memory in CPU-Z. Mine has some timings also listed for 888 Mhz. If yours also has this you can overclock more. 888 / 3.33 = 266, meaning you can run 13.5 x 266 = 3591
You just need to go back in the BIOS, change the 240 to 266, change the CPU/NB speed to 2394, HT speed to 2128, and change the memory timings to what is shown in CPU-Z for 888. Mine shows 10,10,10,27,42,2T.
 
Thanks for that info. It makes sense. Yeah, I got mine at Microcenter. I was visiting my brother over Easter and he had one near his house (closest one is 2 hours from my house). Fun experience :).
 
RAM timings were the answer it looks like. I'm up and running at 3.6Ghz now on stock voltage (266x13.5). Doing a LinX test now and it hasn't errored out on me. Although, I don't really want to get too crazy with this board. Actually looks like it's throttling a little bit and kicking the speeds down even though the temps are sub-40C the whole time.
 
N H O said:
yep and the same asus that you have, listed in my sig
Click to expand...

Nice...You'll have to update on your progress. After the brain fart on my end pgaster pointed out, it's working well. I almost regret purchasing a FX-8120/M5A97 Evo to replace it with.
 
Glad it worked out for you, so 4gb ballistix run at 9 timings? My 2gb sticks run at 8
 
matteos said:
Glad it worked out for you, so 4gb ballistix run at 9 timings? My 2gb sticks run at 8
Click to expand...

Depends on how fast you're running them. Mine run at 9 timings at 800mhz, 10 at 888mhz, and 11 at 977mhz. I believe they tighten up to 8 and 1T at 667mhz.
 
kirbyrj said:
Depends on how fast you're running them. Mine run at 9 timings at 800mhz, 10 at 888mhz, and 11 at 977mhz. I believe they tighten up to 8 and 1T at 667mhz.
Click to expand...

right, so you've got it at faster speeds and looser timings, is it faster to run it that way?
 
matteos said:
right, so you've got it at faster speeds and looser timings, is it faster to run it that way?
Click to expand...

Well, in my case, I had to do it to get a better overclock out of it. Even when I put the memory at "DDR667" speed in bios, I had to manually adjust the timings to reflect where the final OC was going to end up because the timings at 667mhz in the bios "Auto" setting were causing me to not be able to OC past 215mhz reference clock. So now I am running 267mhz on the reference clock with the 667 memory divider and am running near 900mhz, so I put in the timings to reflect 900mhz instead of 667 to advance my OCing efforts.
 
Always make it a habit to drop your ram below jedec timings and frequencies so you have the headroom you need to test your cpu first
 
I've kind of hit another wall now. I can't get it past 274 reference clock. I dropped the NB multi / HT multi / RAM all down below specs and loosened the timings on the memory. I can run at 274 on stock voltage, but the second I hit 275, it will reboot when running Prime95 (adjusted using AMD overdrive on the fly). I tried upping the voltage and even with 1.375V (up from 1.25V), when I hit 275 it shuts down on me. Is that just the limit of the chip or am I missing something?

I have a 8120 here also, I was thinking of dropping that in to play with it on my new board (M5A97 Evo...I figured maybe the voltage regulation on the M5A78L-MX Plus was holding me back).

I just did some more testing, and I can get Windows to boot at 280mhz reference, but when I do, the bios only shows half of my memory. When I look in Windows, CPU-Z and Windows shows all 8GB, but Windows says only 4GB is usable. I'm wondering if I'm just running afoul of the IMC at a high reference clock. Probably a good reason why this chip wasn't binned as an 1100T ;).
 
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Every board out there has a limit as to how far the bus will go stable. If it were me, I'd drop to 270, and try to use 1t memory timings at 667(lower if the mem isn't at least DDR3 1600), and NB at 2.6 Ghz. The 1T setting has a big effect, look it up.
 
Solomutt said:
Every board out there has a limit as to how far the bus will go stable. If it were me, I'd drop to 270, and try to use 1t memory timings at 667(lower if the mem isn't at least DDR3 1600), and NB at 2.6 Ghz. The 1T setting has a big effect, look it up.
Click to expand...

I'd think a new Asus board based on the 970 chipset would do better than 275mhz. Especially when a "cheap" 760G board hit the exact same frequency before it crapped out. I'll look at increasing the NB and getting the memory back to 1T. Right now I'm running it at 890mhz, but if I dropped it to the next lower multiplier (770mhz or so), I should be able to get 1T out of it.
 
You may also be able to tighten the timings a small amount. I went from 8-9-8-8 2T at 1600 to 7-8-7-7 1T at 1532. It took a bit to find that happy point.
 
Another interesting thing I have found out by testing the two boards is that the thermal throttling happens much earlier on the M5A78L-MX Plus. I couldn't run a single LinX pass without the CPU throttling down. This happened right around 40C (in AMD Overdrive). On the M5A97 Evo, the CPU will go upwards of 50C and still never throttle. The result is that I get significantly faster passes in LinX and higher GFlops.

I thought it might be a problem with the mosfet cooling on the M5A78, so I started looking into getting the Enzotech mosfet coolers and an additional fan or two, but then I realized that I'm just dumping money into getting a cheaper board to perform like the other one I already have, so I decided to just keep the M5A97 Evo instead. I figure that will be a better board to run Piledriver anyway if I decide to stay with AMD.
 
Only Black Editions unlock, and if you have a BE, any board will be able to mod the multi provided the bios lets you.
 
Let me rephrase myself. No motherboard will let you up the multiplier of a locked chip. You can lower them just not up them.
 
Stayfr0sty said:
Im talking right mobo as in something that can do very high fsb for a locked CPU.....
Click to expand...

It's not always the MB as, no matter what I do, I can't get over 270mhz stable. Same 270mhz on three different boards. I guess it's all that chip will do.
 
Well it is still a nice OC and it has brought that cheap CPU up on par with a far more expensive model.
 
you can most defiantly reach 3.8. When i had my 1045,phenom 55 and my 720 i could easly get to 4.0 with a little bump to 1.35. highest i ever got on a phenom was the p55 with a 1.65 volt and i got to 5.09.
 
as for you limit on the fsb i normally go as far as i possibly can and then drop the multiplier on the ht link and north bridge to keep them stock. try that. but a 270fsb is still pretty good.
 
blaze15301 said:
as for you limit on the fsb i normally go as far as i possibly can and then drop the multiplier on the ht link and north bridge to keep them stock. try that. but a 270fsb is still pretty good.
Click to expand...

I tried that. I dropped the multi on the HT and the RAM so the RAM was running as slow as it would go (DDR3 1600 memory) and the HT was well under 2Ghz. I bumped the voltage up to around 1.375V or so, but it didn't make a difference. 274 was pretty much the limit for stability. I could boot into Windows around 300, but it wasn't stable. I'd start IBT and it would blue screen/crash. Even at 274mhz, it wouldn't always pass 10 runs of IBT.
 
Our processors are a bit different but I hope this helps. These are my settings.

Multiplier: 20
FSB: 200
vCore: 1.4v
vNB: 1.38v
vCPU/NB: 1.4v
NB: 2600MHz
HT: 1800MHz
 
I can't change the multi, so I'm stuck at 13.5. 13.5x267 = 3.6Ghz@stock voltage. I mean, it's not great, but the whole package cost me about $120 for the CPU/MB, so I'm not complaining.
 
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