Okay, as far as I can tell, the 147.3 Watts shown in Core Temp looks to be an anomaly in which the mobo can't figure out how to read the CPU correctly. Correct me if I'm wrong but I figured that if the TDP went from 130 Watts to 147.3 Watts, it was consuming more power.
In fact, my UPS says the exact opposite. looked at the display on my UPS (showing Kw output) under two different settings shown below.
Lol, we are talking about very small differences in the system power draw. The minimal change you see could be due to a change in voltage (assuming you have vdroop on). Or it could be due to the small increase in ram speed because of the higher base clock.
Oh, I know it's a minimal amount. I was merely worried that the 920 has a TDP of 130 Watts and with Turbo Mode enabled it jumped to 147.3. I just wanted to make sure I wasn't losing efficiency because I plan on running this machine for rendering for hours to days at a time. Any bit of efficiency loss in my own home is understandably a concern of mine.
I was just happy to see that I can achieve the same OC, without changing voltage, using less overall power draw - insignificant as it may be.
I repeated the OC tests/settings. They were consistent every time with power draw.
Oh, and vdroop is disabled so that wouldn't be the cause. I'm sure it had something to do with the lower BCLK for RAM and Mobo. Yes?
Vdroop will drop the voltage depending on the load. So i was thinking there might have been a higher load on the cpu when you read it once than when you read it with the different settings. And thus the power draw was higher the second time.
I assume you are using a program? A much more accurate way would be to use a kill-a-watt reader with the system under load and not under load etc. I have tested it this way and have had a lower wattage draw with speedstep on
Alright bro. Thanks for all the responses. I appreciate the info.
Hey, can you add your specs on my other thread about posting 920 OC BIOS settings? Nobody's responded and I think it could be helpful. You wrote a great 920 OC guide and I figured if everyone posted their stable OC's all in one thread, it could help the cause as well.
Whoa! 4.75Ghz? How long can you run Prime before it errors/reboots? Do you have a D0? I'll check out the guide. Hey, one last question. From what you've seen, what's the average/typical voltages (just vcore and QPI) needed for a D0 to hit 4Ghz? And is that with or without Speedstep?
Haha, yes i have a d0. I never ran prime because my temps were to high. That was on air dude!
Off hand i have seen anywhere from 1.28-1.34 needed to hit 4 ghz most of them fall between 1.29-1.32v vcore. Vtt and qpi vary greatly. Some take no adjustmants some tak up to 1.45v. My system is without speed step. Most people take off speed step to make the sytem less stable.
Oh okay. That makes me feel better. Those voltages seem a bit more realistic on average. I read somewhere the average 4Ghz voltage was between 1.2 and 1.25v for a D0. I thought that can't be for a true 24-hr prime stable machine.
Thanks for all the great info and congrats on the OC on air!