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[Official] MSI 790FX-GD70 Owners Club - Page 929

post #9281 of 9641
Ok thanks guys a friend was asking me. I'll pass the info along.
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post #9282 of 9641
Does anybody know how much NB voltage I can give this board before it goes "boom"?

I would like to know it's limit for air cooling, and for dry ice cooling if anyone knows?
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post #9283 of 9641
When you say NB voltage, do you mean CPU-NB voltage or NB Voltage?

To my knowledge, CPU-NB Voltage can go up to 1.35-1.4V under aircooling, but this is for the CPU-NB Frequency and only affects the CPU. I would probably go as high as 1.45v-1.5v if you're watercooling, though for DICE, I have no idea. MSI has recommended 1.5v as your absolute max, but that wasn't applying to DICE.

As for NB voltage, I don't really see people go past 1.15v-1.25v. There's just no reason to go any higher. I personally keep mine at 1.15v-1.2v.
    
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post #9284 of 9641
Quote:
Originally Posted by Kokin View Post
When you say NB voltage, do you mean CPU-NB voltage or NB Voltage?

To my knowledge, CPU-NB Voltage can go up to 1.35-1.4V under aircooling, but this is for the CPU-NB Frequency and only affects the CPU. I would probably go as high as 1.45v-1.5v if you're watercooling, though for DICE, I have no idea. MSI has recommended 1.5v as your absolute max, but that wasn't applying to DICE.

As for NB voltage, I don't really see people go past 1.15v-1.25v. There's just no reason to go any higher. I personally keep mine at 1.15v-1.2v.
I mean NB voltage. Raising the NB voltage allows you to raise the FSB on this board well past what it can do at stock NB volts. With 1.30v on the NB I got it to 382 fsb, but I want to hit over 400, so I was wondering how high I could go.

As for CPU-NB voltage, you can go to 1.60v-1.65v on Dice and 1.80v-1.85v on LN2 in case you were wondering.
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post #9285 of 9641
Quote:
Originally Posted by HobieCat View Post
I mean NB voltage. Raising the NB voltage allows you to raise the FSB on this board well past what it can do at stock NB volts. With 1.30v on the NB I got it to 382 fsb, but I want to hit over 400, so I was wondering how high I could go.

As for CPU-NB voltage, you can go to 1.60v-1.65v on Dice and 1.80v-1.85v on LN2 in case you were wondering.
Ah, I forgot about NB voltage could affect FSB overclocking. I think I got up to 375 on 1.3v before, but the CPU and memory frequencies weren't what I desired.

Do you use the OC dial to increase FSB after bootup or do you just set it straight from the BIOS? I think I was able to cheat getting up to 380 or 381 using the OC dial, but it wasn't stable.

Thanks for the info about CPU-NB voltage, though I don't think I will dabble in DICE or LN2.
    
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post #9286 of 9641
Quote:
Originally Posted by Kokin View Post
Ah, I forgot about NB voltage could affect FSB overclocking. I think I got up to 375 on 1.3v before, but the CPU and memory frequencies weren't what I desired.

Do you use the OC dial to increase FSB after bootup or do you just set it straight from the BIOS? I think I was able to cheat getting up to 380 or 381 using the OC dial, but it wasn't stable.

Thanks for the info about CPU-NB voltage, though I don't think I will dabble in DICE or LN2.
I would boot into windows at ~350-360 and then OC dial up from there. I'm only doing this for benchmarking, so it only has to be stable enough to run some short benches. I think I should be able to go past 1.4v on the NB if I get the board cold enough.

Thanks for everything, you've been quite helpful. +rep
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post #9287 of 9641
Quote:
Originally Posted by HobieCat View Post
I would boot into windows at ~350-360 and then OC dial up from there. I'm only doing this for benchmarking, so it only has to be stable enough to run some short benches. I think I should be able to go past 1.4v on the NB if I get the board cold enough.

Thanks for everything, you've been quite helpful. +rep
I didn't even get to help, but instead you taught me. +rep for you.
    
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post #9288 of 9641
Quote:
Originally Posted by Kokin View Post
I didn't even get to help, but instead you taught me. +rep for you.
lol, well then in that case I'm glad I could help

I only know those limits because I've experienced them myself with this board while running DICE and LN2.
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post #9289 of 9641
OK. I have done some testing and ...

Under load - Intel Burn Test - 30 passes:



and after the test:



and Cache and Memory benchmark:



I know that voltage for both of CPU and CPU-NB are quite high but anything lower ended as failure in test.
That's the highest CPU-NB overclock I have ever hit on Phenoms II ... and it's a stable overclock.

The little problem is my memory. That was always this thing that held me back... I have tried to hit 1600 MHz with tight timings like 6-6-6-18-24 1T but with a voltage like 2.02 V it was always unstable.

My previous test with Prime95 was a failure because (that's my theory) Prime stresses memory very heavily (not like IBT).
My Ram Sticks hit 51*C under full load in Prime95 (blend) and in IBT it was only 38-43*C. After 1 hour one of the cores shutted down but the other 5 were still working without any problems.
Do you think it was because of very high temp on RAM ? Any way to cool those sticks down ? (this Scythe Mugen is just very good cooler but it takes a lot of space and a distance between Ram sticks and an egde of Mugen is like 5 mm (and I have seated them in bank 3 and 4).

Now, I am going to test if it is better to rise memory clock speed to 1700 MHz but with loose timings like 7-7-7-20-27 (need to change these Patriots because it actually limits my all OC.

One more thing. Even if in my previous test with Prime95 was not 100% stable (because of this heat probably) do you reckon that actually my system is stable now? Well, it's I can assume that I will never use all 6 cores with 100 % load for 4 h or more (in everyday use? .... nahhh)
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post #9290 of 9641
very good tweaking pendrago!

try to hit atleast 4ghz on all cores.
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