A64 3200+ 62W mobile o/c results

[dimasukr]

On VNF3-250 with SLK948U:
2.55GHz (255x10) @1.65v stable
2.5GHz @ 1.55v
1.7v didn't add anything - better cooling is needed.
I got 3000+ Newcastle (rev CG) to 2.42@1.7v in the same system.

So 62W really are hand picked CG cores.
Still more then 3700+ performance for less then half of price cannot be beat.

Interesting to see if 35W 1.2V mobile can beat this one

 

[Bar81]

How high could you get it at 1.55v? What are your temps?

 

[dimasukr]

I didn't try lower voltages at all - went straight to 1.7V
Why 1.55V ? why not stock 1.4V ?
Will try tomorrow.
My temps are 66-68C under load - but I don't trust these numbers - think that mobo is wrong here.
When are you getting that K8N Neo?

 

[Bar81]

It's the highest vcore I feel comfortable using. Plus it keeps the thermals down. I would really appreciate it

 

[dimasukr]

Ok. I was suprised - at 1.55V I got to 2500MHz - pretty stable ( hour or so 3dMark loops)
So I think 1.7V is not needed after all (on air at least).
Will try 2.55Ghz on 1.6

 

[dennisjai215]

keep us updated.. how much did the 62w cost you?

 

[dimasukr]

Tried to lower voltage and here it is 2.55GHz @1.65
I bought it here - newegg.com

 

[Bar81]

Thanks.

 

[Zebo]

OOS

 

[Hyperlite]

Originally posted by: dimasukr
I didn't try lower voltages at all - went straight to 1.7V
Why 1.55V ? why not stock 1.4V ?
Will try tomorrow.
My temps are 66-68C under load - but I don't trust these numbers - think that mobo is wrong here.
When are you getting that K8N Neo?

yeah i HOPE your mobo is wrong, that chip will be toast faster than you can run to the kitchen and make it.

 

[Bar81]

Originally posted by: Hyperlite

Originally posted by: dimasukr
I didn't try lower voltages at all - went straight to 1.7V
Why 1.55V ? why not stock 1.4V ?
Will try tomorrow.
My temps are 66-68C under load - but I don't trust these numbers - think that mobo is wrong here.
When are you getting that K8N Neo?

yeah i HOPE your mobo is wrong, that chip will be toast faster than you can run to the kitchen and make it.

not at all. Those temps are WELL within A64 specs.

 

[alexXx]

yea dont listen to hyperloser it is quite obvious by his post that he doesnt know what he is talking about

 

[Lyfer]

What type of ram are you using? Does the cpu fit snuggely under the heatsink even though its missing a heatspreader?

 

[jpeyton]

Mobile chips (A64/Barton/Whatever) are typically rated to 80-90C Max operating temp.

 

[ectx]

Originally posted by: Lyfer
Does the cpu fit snuggely under the heatsink even though its missing a heatspreader?

Could anyone please clarify the issue? How missing hetspreader affects the use of HSF's? Thanks.

My days of A64 chips may come earlier than late. Since 939 is going to be so expensive, I might as well pick up a reasoablly price, oc'able mobile a64 and a chaintech mb and play with them.

 

[dimasukr]

I'm using OCZ PC4400 EL GOLD 512MB 1 DIMM (beta bios for VNF3-250 doesn't work with 2 DIMMs of this ram at 1:1FSB - see motherboard forum for details).
As to heatsink - I'm using SLK948U (as seen above) and it has its own backplate and not the AMD one (which has be be removed from motherboard)
and this allows it to contact CPU die without any problem.
Now, I'm not saying that standard AMD CPU mount bracket will not allow to mount heatsink on mobile CPU it just that nobody (that I'w aware of) has tested it.

 

[Bar81]

It won't

 

[ectx]

Originally posted by: Bar81
It won't

Any link for this? I am looking for hsf now and want to be sure I buy somthing that may fit my next cpu

 

[Bar81]

http://forums.anandtech.com/messageview.cfm?catid=29&threadid=1321894

 

[Lyfer]

Originally posted by: Bar81
http://forums.anandtech.com/messageview.cfm?catid=29&threadid=1321894

Great job!:beer:

 

[Bar81]

Thanks, just trying to help

 

[charloscarlies]

not at all. Those temps are WELL within A64 specs

I wasn't aware electromigration cared whether or not temps were within spec.

1.7 volts is quite a bit to be running through an A64 with air-cooling. They aren't like bartons in terms of scaling with voltage either. I'd back it down if you want to have that chip for very long.

 

[Jhatfie]

Ok. I was suprised - at 1.55V I got to 2500MHz - pretty stable ( hour or so 3dMark loops)

Very Nice. I have to use 1.74v to get my older CO stepping 3000+ to run a 24 hr Prime95 stable 2500mhz. I'd love to give one of those mobiles a try. Oh if only I had the funds.

 

[Cheval]

Originally posted by: Bar81
http://forums.anandtech.com/messageview.cfm?catid=29&threadid=1321894

:heart:

 

[imported_infinity9]

I've yet to get my MSI K8N Neo Plat to get the voltage saved above 1.17. At default its .91 at 1.6 its .99 at 1.8 its 1.17. I can change the multiplier and voltage with clockgen fine but it will not get the voltage right with the bios. I'm using a Mobile Athlon 64 3200+ 'CG' revision.