What is the stock voltage of the CPU/NB of a 970?

sWedx · Apr 27, 2014

Hello all!
My specs:
AMD FX 6300 @4.4Ghz @1.38v
Gigabyte GA-970A-D3 (rev 3.0) with vrm heatsinks
2x Kingston DDR3 4GB 1333Mhz
PSU OCZ ZT750W
Radeon HD 7950 1100/1450 @1.250v
Everything stable 24/7

I'm trying to overclock my CPU/NB but it does not shows me the stock value. It just let me increase, for exemple "+0.100v".
Actually i'm running it at 2400mhz @+0.100v. I'm just worried about to increase it so much. The temps are fine over all system (CPU, nb chipset, vrm's, etc...). I want to go higher because I intend to do a crossfirex and I read that for a CF and a CPU at this frequency I will need more frequency at CPU/NB for no get an bottleneck on it.

And I read at GSkill forum (i cant find it again) that higher the memory frequency, higher the CPU/NB goes with less voltage. Is that true?

Oh, and i'm aware about the 16x/4x; that i'll need to run the GPUs at stock voltage because of the PSU; and the possible bottleneck of my CPU. For me it's not a problem

i7Baby · Apr 27, 2014

Boost - 4.1 HGz - 1.425V http://www.cpu-world.com/CPUs/Bulldozer/AMD-FX-Series%20FX-6300.html

photonboy · Apr 27, 2014

Higher frequency = lower voltage?

I'm not quite sure what you mean but that doesn't sound quite right. If you mean that you need less voltage for the CPU when you have 2133MHz DDR3 memory than you need for 1600MHz I highly doubt that.

sWedx · Apr 27, 2014

I expressed myself wrong. I wanna mean: with 1333mhz and +0.100v on CPU/NB I can reach 2400 on it. If my RAM was 1600, I was able to hit 2600 with the same voltage. But i just wanna go for 2800 or 3000, and i'm afraid to increase too much my CPU/NB voltage because my MOBO doesnt shows me the stock value. If it was 1.1v, like the 970 are with phenoms, it would be nice and I was able to go like +0.250v. But if it stock are 1.2v, then i'm very close to the safe limit which is something like 1.350v on air.

i7Baby · Apr 27, 2014

OK - you mean North Bridge - ram voltage. 1600 MHz ram won't run at 2600MHz. The voltage for the ram should be 1.5V

sWedx · Apr 27, 2014

i7Baby :

I'm asking the NorthBridge itself. But the CPU NorthBridge, inside the AMDs processors (not sure about intel), not the NorthBridge chipset on the MOBO. It should be 1.5x the RAM frequency. For exemple my RAM at 1333 x 1.5 = 1999,5, so my CPU/NB should be 2000. But if I overclock or add some PCI-E cards, I might need to increase that value. And for that I need increase the voltage, but it have a safe limit, and I have no idea how close it is because my MOBO doesn't shows me de stock value, it just let me increase.

(Maybe a new (better) mobo and 1600 ram sticks solve my problem LOL :lol

i7Baby · Apr 27, 2014

OK these days I'd just let XMP do it's work and set the voltage, timings and frequency. No manual labour involved.

sWedx · Apr 27, 2014

i7Baby :

But XMP is an Intel technology. However, I think that I found it at overclock.net (http://www.overclock.net/t/512755/cpu-nb-voltage#post_6305383)

on AM3 platforms, default values are 1.1v

[OFF]
Well, thanks for the attention, and a new headache begins: Found the problem: MOBO or low frequency sticks. Even at 1.35v it doesn't get stable on 2600mhz. Strange, because I only need 1.2v to reach 2400mhz. So, something are causing this trouble. I think it is the MOBO (only 4+1 Power Design Phase). I'll try some overclocks on RAM and see how it matches.

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What is the stock voltage of the CPU/NB of a 970?

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