Dark Volker

I'm currently running this system 100% stable at 3.375GHz with a 15 : 16 ratio. RAM is running 800MHz @ 4-4-4-15 23 1T.

When I bump up the FSB to run the system at 3.50GHz and run the RAM at 778MHz for a 1 : 1 ratio, I get a very unstable system.

I was wanting to know first, if I should change the SPP <-> MCP(HT reference clock frequency for MCP) from Auto to 200.0 or different? I think I've given this overclock enough VCore so that won't cause my instability, but I'm not sure about my CPU VTT(1.40V @ 3.375GHz), NB BR04 CHIP Voltage(Auto @ 3.375GHz), NB CHIP Voltage(Auto @ 3.375GHz), or my SB CHIP Voltage(Auto @ 3.375GHz).

I've tried lowering and raising my CPU VTT by one increment both ways and setting @ Auto, setting SPP <-> MCP to Auto and 200.0, setting NB BR04 CHIP Voltage @ Auto-1.20-1.25-1.30V, setting NB CHIP Voltage between Auto-1.40-1.45-1.50V, and setting my SB CHIP Voltage at Auto and 1.55V.

I can't seem to find a combination that is stable. Does anyone know what or near where these voltages/settings need to be?


Edit: I've ran MemTest86 v.3.4 with the setup for 3.50GHz and it passed one complete test.

Thanks!

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Domino

try and stay away from anything saying auto and give it a specific value

Unrealfarcry

so giving the board specified values makes it stable?

Dark Volker

Do these voltages sound about right?

3.450GHz

VCore=1.296 Idle CPU-Z(1.39375 Bios)
CPU VTT=1.40V
Memory=2.150V
NB BR04 CHIP=1.30V
1.2V HT=1.24V
NB CHIP=1.48V
SB CHIP=1.55V
GTLVREF=Auto

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Unrealfarcry

yeh that sounds about right, problem i get is when my cpu hits the 1060mhz fsb on the cpu and 800mhz mem it dont like it, i dont know what speeds i need to set to make it clock higher, because my cpu has a 12.5 multiplier.. ive tried floodin it with voltage, something else is stoping it an ideas?

dcshoejake

Keep your ram unlinked, keep @ 800MHz *JaKe*

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Unrealfarcry

alright so as long as i keep it 800 or just under it should be fine yeah?

Dark Volker

Have you noticed what you have been running your FSB : DRAM ratio at? I've noticed that the board likes 15 : 16 instead of 1 : 1, 5 : 6, etc.

To do this...take your FSB÷CPU multiplier=Bus Speed and then multiply your Bus Speed by 1.0625 and that is what your Bus Speed(My RAM has a divider of 2...so I then multiply that number by 2 to get my actual RAM freq.) of your RAM should be to make it a 15 : 16 ratio.

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Dark Volker

I think I'm going to give up on overclocking with this board. I can't go past 3375MHz and still be 100% stable.

I'm going to swap motherboards for a BFG nForce 680i SLI board until I can get a decent 780i, 790i, P45 or X48 mobo.

What kind of decrease am I likely to find in my GPU performance since the 680i chipset doesn't support PCI-E x16 2.0? Is it really going to decrease my GPU performance by 50%?

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Unrealfarcry

welll im geting slowly closer, earlyer i couldnt get mine past 3.3 now its at 3.47, so i must be doing something right im not ready to give up yet, got this baord to replace me 975x so im gona make it clock up