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***official amd 83x0 overclocking thread***

Sorry guys, but if you think 30-40gflops (and barely any increase in temperature) on an FX8 is "giving your processor hell" you're on hallucinogens.

An overclocked 2500K gets about 110gflops on IBT so are you accepting that FX8 is 3 times slower? IBT is not an efficient test for AMD because it is not using the processor to its full potential...

Prime95 (small/large FFT) is a much better test providing you haven't past the threshold of thermal throttling under load.
 
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^^ +1

80 - 100Gflops on 10 runs of IBT at very high will be more of a workout and will reach high temperatures.

It depends on the use you put the processor too in general apps. many games just are not going to tax the processor that high. Rendering will. So test your overclock to suit your usage but bear in mind it may give errors if clocked too high on too few volts.
 
Might just be me on hallucinogens, I dont know what I'm doing :)

I thought I read earlier in the thread that 5 runs with linx is a good initial stability test (saves testing for hours on end with prime) Then once you're happy with your clock you can do a longer small/large FFT prime test to really check the stability?
 
I personally wouldn't use these stress tests at all. I would bench cinebench and then 3DMark 11 and Heaven 4 and Valley on loop. If it is stable on these, it can manage what I do day to day.
 
famas said:
Might just be me on hallucinogens, I dont know what I'm doing :)

I thought I read earlier in the thread that 5 runs with linx is a good initial stability test (saves testing for hours on end with prime) Then once you're happy with your clock you can do a longer small/large FFT prime test to really check the stability?
Click to expand...

I think that a lot of people are testing with 5 runs of Linx as you say just to test the PC at a certain overclock. If you are never going to put loads of heat into your CPU in normal usage that is fair enough. I used to test my 5GHz overclock with prime on four workers purely because most apps and games were not going to use more than that in 95% of cases.
There is no point overheating your CPU for several hours just to get a synthetic tick mark in the box. I asked 8 pack the same question and the answer was basically test the PC with what you would normally run.

It is easier to prime test a CPU with fewer cores because each core will produce a similar amount of heat to be dispersed and with current cooler technology eight cores at 5GHz running prime is almost impossible to get rid of.

The short answer is that 5 runs of Linx will not prove beyond a doubt that the computer is stable but it is better than a 10k SuperPi run and even then if the computer errors in use you can reduce the clock or increase the voltage.

Your 24/7 overclock is almost guaranteed to be 4.5 to 4.8GHz with a max of 4.9 to 5GHz or a bit more if you have a good board and cooling
 
alex_123_fra said:
I personally wouldn't use these stress tests at all. I would bench cinebench and then 3DMark 11 and Heaven 4 and Valley on loop. If it is stable on these, it can manage what I do day to day.
Click to expand...

Pretty much sums it up, yes. IE - get it done quick as there's no point in putting your PC under dangerous loads for hours and hours just to find out if it's stable. For me that did mean LinX, though it seems with Realbench 2.0 I have found a new nemesis. I did manage to get through the render torture tests but the multi tasking torture test? my CPU hit 72c and the PC froze at 5ghz lol.

Back to the drawing board...

I other news I did get my bus to 250mhz with a multi of 20 for the 5ghz. This lowered temps by 4c, but sadly it still wasn't enough to get through the multi threaded tests on Realbench. Talk about making your PC poo through its mouth !
 
AH ha, Your the person with the modded vrm fans, been trying to find some pictures for days. (sorry to go off topic)

Do you have any more pictures Andy and how you made the brackets?

I started my bracket today and would be good to see how you made yours.
 
famas said:
AH ha, Your the person with the modded vrm fans, been trying to find some pictures for days. (sorry to go off topic)

Do you have any more pictures Andy and how you made the brackets?

I started my bracket today and would be good to see how you made yours.
Click to expand...

I do mate yes. I even have a blue print of it (a cutting one).

I have a massive thread about my rig here -

http://linustechtips.com/main/topic/60992-alien-antidote-the-colossal-colossus/

This page covers the NB fan.

http://linustechtips.com/main/topic/60992-alien-antidote-the-colossal-colossus/page-3

However I admit I did not take loads of photos. I'll get a photo of the blue print shortly so you can see how to map it out. You'll need a printer and some prit stick...
 
Here is what the basic blue print looks like that I use. I prit stick it down to the acrylic before cutting it out. Obviously it changes a lot and I carve the edges round with the Dremel. To bend it? hold it into a toaster with a pair of pliers and then (with some gloves on) I bend it over the kitchen side board.

 
nice one cheers for that.

Mines going to be slightly different as its mounting onto a radiator but its good to see your blue print.

Will most likely be pretty similar when i've finished.

What glue did you use to hold the fan to the bracket?

I've already bent my bit of perspex, after completely melting the first bit on the wood boiler at work the second one came out a lot better :).

Also I might have a sticker, I'll have to dig out my cpu box and let you know.
 
Guuuuys, started OC'ing my 8320 today and so far i've got here....
4.8 (24x200) with 1.4v, socket temp 48.1c, core temps 38c after 4hours priming.
I've not yet messed with anything besides LLC (set to UHIGH) the multi the cpu and ram volts and the ram timings.

I also quickly tested 220x23 and that was stable with 1.428v,
I tried 220x24 but that needed 1.486v and got a lot warmer (57c socket, 48c core)

At what point does the core temp tell the truth? (it did read it was over a certain c but can't find it now) I assume im best still going by socket temp? and is 1.5v the max I could safely use day to day? getting to this point was very easy (like OCing an intel tbh)

Spec is... 8320, sabertooth 990fx r2.0, 8gb crappy kingston 1600mhz, my custom car radiator loop.
 
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