Your motherboard must not be able to handle the overclock and sends the video card data with artifacts. Not the cpu most likely the mobo.

 

Agreed. I even doubt the motherboard has a PCI-E lock, and thus you're likely overclocking the PCI-E bus together with the CPU... that's imo the likely cause of your problem. If so, you need to back down severly, since an overclocked PCI-E bus can cause permanent damage to your video card. No more than a 10% overclock is recommended if the PCI-E bus indeed cannot be locked.

 

This has actually happened to me before. I overclocked my old 3700+ and it artifacted, and I was using a DFI Lanparty CFX-3200. But it was fixed by upping the voltage. So in a way, YES this is true

 

Quote:

Originally Posted by Chozart Agreed. I even doubt the motherboard has a PCI-E lock, and thus you're likely overclocking the PCI-E bus together with the CPU... that's imo the likely cause of your problem. If so, you need to back down severly, since an overclocked PCI-E bus can cause permanent damage to your video card. No more than a 10% overclock is recommended if the PCI-E bus indeed cannot be locked.

This is AGP bro, sig system

 

Quote:

Originally Posted by Straka This is AGP bro, sig system

Ok, same story, but then with the AGP/PCI bus

If you cannot lock the AGP bus, you're in trouble.

 

where do I look for that then?

 

In the BIOS. I assume (hope) you overclock in the BIOS. There should be something like an AGP frequency and/or a PCI frequency. The AGP frequency should always be at 66MHz, while the PCI frequency should be at 33MHz. If you don't have those entries, the AGP bus and PCI bus overclock together with the FSB (and thus the CPU).

At stock, your D805 runs at an FSB of 133MHz (or 533MHz Quad Pumped), which results in 2.66GHz (multi is x20). Now, at the speed you manage you get out of it, your FSB is 162MHZ (or 648MHz Quad Pumped), and the AGP bus will run at 81MHz if it cannot be locked. That's too high for most video cards to handle, and if this it's what's happening, you're pretty lucky that artifacting is your only problem. I highly recomment to keep the overclock limited to 10%, or 15% if you don't mind a little risk, since a high AGP bus will cause damage to a video card.

 

at 162 I have no artifacts, at 164 or higher I get artifacts. There are no AGP options in the bios besides voltage, which is set to normal, and yes of course I overclock in the bios. The bios is probably using automatic dividers for the AGP/PCI busses then, since my PCI sound card is also working fine, it was at 170 even

I'm pretty certain it's simply the limitation of CPU voltage, the guys that got it to 4.1 with this stepping had it at 1.52v or so

 

Haha sweet I was right in my speculation for once!

 

Since it's an ECS mobo with a VIA chipset, I highly doubt it automatically locks.

This has nothing to do with CPU voltages. Based on your description, this is too high an overclock of the AGP bus. PCI generally can handle more, and the first symptom of malfuction on that part will be the network cards. Also, your bus speed for your hard drives is likely clocked too high.

You put yourself at quite a risk.

 

Is there any other way to lock them besides the bios, or is there a tool to check their current speeds?

 

I agree, this has MOBO/chipset writen all over it. Half the people on this forum have played with a PD805 on highly overclockable boards without this issue. Your choice of chipset is up to you, but I wouldn't start a thread named "Heads up: CPU can cause artifacts" based on the results of an overclocked VIA chipset.

Edit: Sorry, didn't mean to sound harsh.

 

I'm not an expert on chipsets, or overclocking for that matter, try not to crucify me

 

Quote:

Originally Posted by Straka I'm not an expert on chipsets, or overclocking for that matter, try not to crucify me

Sorry if we came accross too rough on you... not our intention

Your initial reaction is logical, but in this case incorrect (based on the information you gave us).

Just reduce your overclock a bit and enjoy

Just keep a good eye on artifacts and such, and if you get them again, clock back a bit more even.

ECS makes good products, but isn't targeting the overclocking crowd. Thus, the overclocking capabilities of their boards are limited, and often they simply don't overclock at all.

Good luck with your rig.

 

Its the mobo