AMD X2 3800+

[jaykay]

thats one thing bad about amd cpus
they need such a big vcore jump to get to 3ghz
my 3700 can do 2.7ghz at stock but takes 1.55 to get to 3ghz

 

[gurusan]

************************

 

[gurusan]

thats one thing bad about amd cpus
they need such a big vcore jump to get to 3ghz
my 3700 can do 2.7ghz at stock but takes 1.55 to get to 3ghz

It depends on the cpu and stepping. Many opterons can clock pretty well on stock volts.

 

[Justintime]

http://forums.overclockers.co.uk/showthread.php?t=17578954

Says a lot.

What it tells me is that Manchesters are more common than Toledo in x2 3800+ form and that most of those 3Ghz+ clocks weren't stable and were done on phase/water. I've owned 5 x2 3800s and none were Toledo, also built many rigs with them and only a few were Toledo.

The clocks highlighted red were suicide shots and unstable / too hot for day-to-day use. If you are using this thread for a guide, don't attempt those sort of speeds - go for the 2500ish area. Overclocks in green are with the AM2 processor.

 

[weescott]

I see but that only applies to X2 3800+ though - there are far more manchester 3800+ than toledo ones, let alone a good stepping toledo.

This is an AMD X2 3800 thread so my reference is perfecty valid.

 

[Big.Wayne]

has anyone heard of the A8N-SLI being iffy when it comes to overclocking

Nope, the ASUS series of nForce-4 boards are superb!

To be fair its normally the motherboard people blame when their overclock doesn't work out for them but in most examples the issue is caused by something else.

 

[spookywillow]

Nope, the ASUS series of nForce-4 boards are superb!

To be fair its normally the motherboard people blame when their overclock doesn't work out for them but in most examples the issue is caused by something else.

i have to disagree there,

i have that mobo and it sucks, in bios my vcore is set to 1.5v yet cpu-z and any other monitoring app says that my vcore is anything from 1.52 - 1.59v.

all apps also report my rails being quite low (11.9v for the 12v) yet when i test with my multimeter its at 12.1v.

i cant wait to get a new mobo tbh.

 

[Big.Wayne]

To be fair its normally the motherboard people blame when their overclock doesn't work out for them but in most examples the issue is caused by something else.

 

[Gashman]

i have to disagree there,

i have that mobo and it sucks, in bios my vcore is set to 1.5v yet cpu-z and any other monitoring app says that my vcore is anything from 1.52 - 1.59v.

all apps also report my rails being quite low (11.9v for the 12v) yet when i test with my multimeter its at 12.1v.

i cant wait to get a new mobo tbh.

thats cause desktop monitoring things are generally crap, but it doesn't seem possible for me to boot at 250Mhz, which is what i need to get CPU to 3Ghz, watercooled so the temperature is nice and low, anyone got any idea how to get past this stupid annoying brick wall i have ran into, gonna have a fiddle with it sometime, i have most recent ASUS bios, know if theres any better ones?

 

[spookywillow]

well with any of the other mobo's i've had they have generally been spot on, only asus that does it.

my old a8n-e deluxe (think thats what it was called) was exactly the same, readings all wrong and lots of vcore needed.

changed that pos to the abit nf7-s and everything read perfect and less vcore needed.

 

[jaykay]

i have a a8n-sli
it clocks pretty good the max i got it to was 290 but that was with a 6 multi

 

[steve258]

This is an AMD X2 3800 thread so my reference is perfecty valid.

My original argument was with regards to your post:

Toledo's are only good for 2.8ghz stable whereas Manchester cores should reach 3ghz stable.

which implied to me that you were referring to all Toledos and Manchesters in general, if you were only referring to X2 3800+ then I apologise.

 

[spookywillow]

i have a a8n-sli
it clocks pretty good the max i got it to was 290 but that was with a 6 multi

dont get me wrong, it does clock ok but the voltage side of it is appaling.

i can reach 320 fsb with a lower multi but i prefer to keep everything in sync.

 

[jaykay]

dont get me wrong, it does clock ok but the voltage side of it is appaling.

i can reach 320 fsb with a lower multi but i prefer to keep everything in sync.

yer same ive put the voltage at 1.4785 or some thing like that and on cpu-z its at 1.47-1.5
when i turn the voltage up to 1.5 in bios its at 1.52-55 in cpu-z

i just place the voltage down 1 from what i want so its no biggy

 

[geeza]

Toledo's are only good for 2.8ghz stable whereas Manchester cores should reach 3ghz stable.

whats this info based on?

My toledo core 3800 is currently at 2.8ghz on 1.35v. It booted at 3.1ghz under 1.45v but the temps were well high and it crashed in orthos and supreme commander

 

[weescott]

Posts here and at XS, and my experience. You have a VERY good Toledo there.

I had my Toledo at 3.3ghz (second highest clocking that I am aware of). I have seen Manchesters get 3.5ghz plus.

 

[ghgh]

Posts here and at XS, and my experience. You have a VERY good Toledo there.

I had my Toledo at 3.3ghz (second highest clocking that I am aware of). I have seen Manchesters get 3.5ghz plus.

what vcore was that 3.3ghz at mate? I guess it was a suicide shot?

max suicide shot i can get from my x2 3800 toledo on air is around 3150mhz.

 

[weescott]

Yeah it was a suicide shot. 1.7v IIRC 1.75v made no difference. I was mobo limited, someone else tried the chip in thier "Uber clocking" mobo and couldn't get it past 3Ghz. :s

 

[Gashman]

dont get me wrong, it does clock ok but the voltage side of it is appaling.

i can reach 320 fsb with a lower multi but i prefer to keep everything in sync.

thats not fair i reach 250Mhz TOPs with my 4600+

 

[jaykay]

have u lowered the ram divider and cpu multi to find out