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Foxconn 590 SLI overclocking...

post #1 of 9
Thread Starter 
This is a 2 part question really.

1
Ok, so ive have this board for a while and im a bit confused. Previously I had a Gigabyte 570 SLI board which i think i burnt a bit, its NB got too hot after leaving the pc on for 16+ hours and couldnt run stock settings anymore... Anyway, before all that happened, i could run 3.2 on my CPU and i was 7 hours stable.

On my new mobo, i cant stay stable at 3.2 :S. Ive tryed a few settings to see what happens, if i drop the HTT from 5x to 4x i BSOD before making it into windows, if i leave it on 5x i get illegal sumouts on ORTHOS.

Anyone got any suggestions to get stable?

2
I found an offical Nvidia 590 SLI overclocking guide on the net and tryed some settings out, according to that, the Nforce chipset's MCP > SPP could do 300 x 5 easily.

My question is, what benefits does this bring, if any..?

Thanks !
    
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post #2 of 9
1) Keep your HTT around 1000mhz. I can run my board at 1400, and its nf590 also, but maybe your board has something different or something.. dunno. If that fails, then maybe you need to increase voltages somewhere. If your gigabyte was adjusting the voltages for you dynamically, then you may need to do it manually here unless the option is supported by your foxconn. Try bumping your CPU voltage, and if that doesnt get you anywhere, then maybe try your chipset voltages.

2)None.
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post #3 of 9
Thread Starter 
Hey, thanks for the reply.

Yeah, i tried to put my HTT multiplier down to keep it near 1000, but it bluescreens at windows startup, ill try it again because i had the Nforce MCP/SPP overclocked too. Ive already got my CPU on its old voltage settings of 1.5v and its not staying stable. On my old gigabyte board, i had my CPU at 1.5 and my Southbridge and Northbridge maxxed out on voltage. Ive got my voltages on my new Foxconn at similar voltages, 1.4 for HTT > SPP, 1.4 for Nforce SPP > MCP, 1.4 for Nforce SPP and 1.6 for Nforce MCP. (These are all reccommended voltages as shown on the Nvidia 590 SLI overclocking guide.

Could it be my ram thats being a problem?, i used to have OCZ gold 2x1GB sticks and i now have GeIL Black Dragon 2x2GB sticks, I didnt have my OCZ overclocked before, it was at 800mhz. On this new ram im at 912mhz overclocked. Im not sure if it would be the ram causing the problem though because according to TechPowerUp, the 2x1GB kit can do upto 1080mhz so im assuming my 4gb kit cant be that much worse.

Also, i didnt think there was any benefit to overclocking the Nforce thing because i tried it and found no FPS/performance improvements.
    
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post #4 of 9
Well first of all, 1.5v for a brisbane is wayyyy much. Brisbanes dont like voltage like the Windsor cores do... I have my cpu at 3.3 and its at like 1.45 or something... Sounds like a classic case of overvolting. My NB and SB are both running around 1.3v so I dunno, try lowering them a bit.

RAM could definitly be an issue. I had assumed you had eliminated the ram already, but since you havent, try putting your ram on a divider. If you are overclocking from 800 to 912, try setting it to 667, that should put you pretty near 800 again, and if you regain stability then you know its your ram. Also make sure your ram is running at its rated voltage. My ballistix posted at 1.8v but were rated for 2.2 at 800mhz, so make sure its set right.

Aside from that, I think you are majorly overvolting your cpu... especially for a brissy :s
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post #5 of 9
Thread Starter 
Ive tested my mobo with the CPU at a lowe multi and i got it upto 300mhz FSB and the HTT was ok 5x.

Also, im kinda confused. I think i might have some sort of Vdrop going on.

Im a bit confused by the voltage readings, When i set my voltage to 1.45 in BIOS, it is displayed as 1.34 in CPU-Z and Everest.

My temps are weird too, i think i need to reseat my TT Big Typhoon, according to Everest, my temps are 51 idle and 54 load.

Anyway, can anyone tell me if this is Vdrop or just weird voltage readings?

Thanks =]
Edited by donk165 - 6/23/08 at 2:08am
    
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post #6 of 9
Ok first off I am tired of hearing that brisbanes can't/don't like voltage. I have run every brisbane I have owned at 1.5v+ to get max performance and all of them are over 2 years old and still run like tops.

The EVGA/XFX/BFG=Foxconn 590sli(all the exact same board), is known to have some issues with voltage reporting as well as temp reporting issues. Its been too long since I have messed with my 590sli but I know a small bump on the south bridge and north bridge can help.(small bump) Also make sure your feeding enough voltage to your ram for it to be stable. To get 3.2ghz I needed 1.5v on my 5000BE, to get 3.3ghz I needed 1.525 and for 3.4ghz I needed 1.55v. I have ran my 5000BE up to 1.60v but gained nothing.

I know my board handled up to 1420HT, but memory wise it generally stopped around 1080mhz.
post #7 of 9
Thread Starter 
Thanks for the reply lemans81, I thought they were just dodgy readings =].
And also i wasnt sure about the whole under/overvolting my brissy, i was on 1.5v constant before @ 3.2ghz. Im confused about this other problem i seem to have, i have a 'MhzDrop' lol =]. Kinda a Vdrop only with Mhz, if i set 220mhz, i get 219mhz. Its weird!

When you say on the south and north bridge, do you mean [Nforce MCP] and [Nforce SPP] or the [HT CPU Link to Nforce SPP] and [HT Nforce MCP to SPP] ones too? Also, how much is a small bump? 0.025v ? 0.050v?

Thanks!
Edited by donk165 - 6/23/08 at 6:14am
    
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post #8 of 9
Thread Starter 
BUMP! I dont know how much to voltage i should give to each part and which ones i should boost. Anyone?

[Nforce MCP]
[Nforce SPP]
[HT CPU Link to Nforce SPP]
[HT Nforce MCP to SPP]

How much should i give them?
    
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post #9 of 9
Quote:
Originally Posted by lemans81 View Post
Ok first off I am tired of hearing that brisbanes can't/don't like voltage. I have run every brisbane I have owned at 1.5v+ to get max performance and all of them are over 2 years old and still run like tops.

The EVGA/XFX/BFG=Foxconn 590sli(all the exact same board), is known to have some issues with voltage reporting as well as temp reporting issues. Its been too long since I have messed with my 590sli but I know a small bump on the south bridge and north bridge can help.(small bump) Also make sure your feeding enough voltage to your ram for it to be stable. To get 3.2ghz I needed 1.5v on my 5000BE, to get 3.3ghz I needed 1.525 and for 3.4ghz I needed 1.55v. I have ran my 5000BE up to 1.60v but gained nothing.

I know my board handled up to 1420HT, but memory wise it generally stopped around 1080mhz.
I completely agree. AMD Mobo's weather they be AM2 or 939 like to stay between 600-1200 HTT. This of course varies from board to board. Now the CPU's can handle higher volts with no issues. I think a lot of people are confusing Intel CPU's with AMD CPU's as far as volts are concerned. I am unfamiliar with Intel so I can not say for certain, but I believe they like lower volts "correct me if I'm wrong"

I have seen a number of AMD chips run with 1.6Volts. This of course means you better have a very good cooling solution. Weather it be a very good air cooler or decent watercooling setup. You really do not want to run over 65c on any chip.

Now I just have to upgrade to AM2+ so I can really dig into these new CPU's
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