Playing with Foxconn A79-S, Phenom 9950 and CrossFireX for G|C

[SoF]

Hi there,

I did not overclock AMD for a long time but preparations for Games Convention in Leipzig/Germany making me testing Phenom this week-end with CrossFireX

Board is Foxconn A79-S wit 790FX chipset & SB750 Southbridge.



Bios has some room for improvements but all in all it is not that hard to overclock it so far. Maybe I will try a little cold on it to see where coldbug is.

All the pots, cards and CPUs from me for G|C - giorgio will bring at least the same amount of things and we will have a great time for sure from 21.08.-24.08. in Leipzig


All in all I have 4x HD4850 to test but no Vista yet



First benches on air 3260 MHZ CPU, some issues when clocking the cards just 5 MHZ higher - I am still trying to figure out how to solve that. Core 1 & 4 are good, 2 & 3 won't pass 32m with this setting. The board allows to clock the cores separately what I am going to try right now.



regards
SoF

3495 MHZ 3xHD 4850 Vista SP1 81k 3D Mark03

[MoF]

This is going to be insteresting :P

[SoF]

I do not fully understand ACC option yet, set on auto I could pass some 3.300 MHZ benches:

[merkk1]

Hi
I'am using the new foxconn a79a-s mother board also .I got my rig up and running a couple days ago for right now using 3.0 ghz at stock v (1.32v) for my 24/7 clock.
I bump it up to 3.2 ghz last night and did a 3dmark-06 run . On my old mother i was never able to run over 2.9 ghz and and when it booted at 2.9 it would run long enought to get a 3dmark-06 run in and that was it . The new SB750 chip and ACC are just what the phenom cpu needed.

[Fatalbert]

SoF, have you got destroyer ?

I saw there one

can you test him with 9950 ?

hmm, if you have got those all hardware you can make the the best scores in 3d on amd

[SoF]

I think I will go for some good AMD results Destroyer is going to be tested later but it does not have ACC which seems to help with OC.

3375 MHZ 1m 23.203s 1.39Vcore


compared to current hwbot results I am not doing too bad with the 9950 until now

[charged3800z24]

Glad to see more results from these chipsets.. Does that run stable at 3.3 with 1.36v?

So are you saying I need to get another 4850 now...

[SoF]

3.3 seems to be quite ok stability wise. 3375 I can bench 03 on core 1&4 now but still can't go over 675 GPU clock :

[Oese]

i'd say the cards become too hot with that stock cooler.. unfortunately..

[D-Cyph3r]

Originally Posted by SoF

I think I will go for some good AMD results Destroyer is going to be tested later but it does not have ACC which seems to help with OC.

3375 MHZ 1m 23.203s 1.39Vcore


compared to current hwbot results I am not doing too bad with the 9950 until now

Hah! Thats me at the bottom.

I snuck in quick and was no.1 for a few days.


Anywho, that board (the first SB750 i've seen over here) is nearly £200, which i'm absolutely not willing to pay for a mid range piece of hardware.

[Oese]

yeah its worth that for some c|q show-off but everyone else is just better off waiting or buying that cheap ASUS 780G board.. only half the cost..

[charged3800z24]

Originally Posted by D-Cyph3r

Hah! Thats me at the bottom.

I snuck in quick and was no.1 for a few days.


Anywho, that board (the first SB750 i've seen over here) is nearly £200, which i'm absolutely not willing to pay for a mid range piece of hardware.

I did a 24 sec run...

[SoF]

I am finally over 3.4 gig and sub 23s 1m Currently I try to pass 32m with it


€dit and 32m!

[charged3800z24]

That's it time for a 9950 BE LOL.... I should have waited on my 9850, buying the first one on NewEgg gave me a less chance of seeing good OC., Although this SB750 board helped a lot. anyone want to buy a 9850BE???

[FlanK3r]

nice, try now on 3400MHz cinebench and wprime please...

[Chris_redfield]

Dr Cypher I totally agree with you on the pricing.

The GX from Foxconn is almost £100 cheaper!

[Fatalbert]

SoF, for destroyer is Aegis panel

hmm, what about bigger mhzs?

try to do 3500 and pi on this

[BertM]

finaly cl4 tests again
how much voltage do you need on ram for that?
lower as expected then on k8?

[SoF]

It is my new Mushkin 8500er Kit which I didn't tested a lot so far. 2.3V to be save but I think it could do with a bit lower volts.
I am currently preparing HDD for Vista to make use of all 3 cards and run some 03 again.

[Fatalbert]

SoF, make the best 3d on amd please

[SoF]

Now benching ~3.5gig with 3 cards under vista ^^ took me hours to mess around with hdd cleaning, partitioning, installing, driver issues etc...but finally it works quite OK



too bad I can't use the 4th card yet - I am missing another 6Pin power cable ^^

[Lightman]

Very good OC SoF! Congratz!!
Phenom at those frequencies will like some water or even cooler things .
Also you can try to use AOD and push CPU VDDC a bit higher to help stabilize at higher frequencies. Good luck!

BTW I'm interested in this board, what is your verdict from OC perspective?

[FlanK3r]

man, try Cinebench and wprime, its better than superpi .

[SoF]

wprime under vista it does 11.2s @3375MHZ (just gave it a quick try no pic yet) but a longer run isn't possible with current air cooling. I need another 6Pin urgently ^^

[Titan7171]

Originally Posted by SoF

I am finally over 3.4 gig and sub 23s 1m Currently I try to pass 32m with it


€dit and 32m!

heres mine on air