Personal computing discussed
Moderators: renee, Starfalcon
Crayon Shin Chan wrote:just from a 700MHz overclock?
Crayon Shin Chan wrote:Actually I think it's quite conservative. Most people get around 3.8-4.0GHz., and then they have to raise the voltage a bit.
Yeats wrote:I'm guessing the reason for LLC is to ease the burden on the VRMs during heavy overclocking, without having to burden the user with the granularity of setting voltage levels for each CPU power state.
just brew it! wrote:It sounds like LLC is a kludge to avoid having to implement a feedback mechanism (from the power pins at the CPU socket) to control the VCore regulator on the motherboard. IOW they're guesstimating how much the voltage will droop due to electrical resistance of the power plane and CPU socket, and boosting the output by a corresponding amount. They're trying to fix something in the BIOS firmware which really ought to be handled by a physical change to the design of the PCB and VRMs...
just brew it! wrote:Yeats wrote:I'm guessing the reason for LLC is to ease the burden on the VRMs during heavy overclocking, without having to burden the user with the granularity of setting voltage levels for each CPU power state.
It isn't going to "ease the burden" on the VRMs. If anything it will increase it, since they're being asked to pump out more power than they would without LLC.
DPete27 wrote:just brew it! wrote:It sounds like LLC is a kludge to avoid having to implement a feedback mechanism (from the power pins at the CPU socket) to control the VCore regulator on the motherboard. IOW they're guesstimating how much the voltage will droop due to electrical resistance of the power plane and CPU socket, and boosting the output by a corresponding amount. They're trying to fix something in the BIOS firmware which really ought to be handled by a physical change to the design of the PCB and VRMs...
Yeah, and isn't "digital" VRM supposed to deliver smoother power delivery anyway? IMO that should almost negate the need for LLC altogether. Sounds like ASUS (and probably others) are using LLC nowadays for things it wasn't originally designed for.
just brew it! wrote:voltage will droop due to electrical resistance of the power plane and CPU socket
fff888 wrote:Plenty of PhD's have had gainful employment for decades.So much money has been invested into such research, does anybody know any positive outcome?
JustAnEngineer wrote:fff888 wrote:Plenty of PhD's have had gainful employment for decades.So much money has been invested into such research, does anybody know any positive outcome?
Captain Ned wrote:JustAnEngineer wrote:fff888 wrote:Plenty of PhD's have had gainful employment for decades.So much money has been invested into such research, does anybody know any positive outcome?
What's the price of LH2 these days?
Crayon Shin Chan wrote:I figured it out! I had left CPU load line calibration on "auto", and thus when it was under load the mainboard (M5A99X EVO) automatically cranked up the VCore to around 1.5V. That was what had caused the incredible temperature jump! Now that I've switched it to "regular", which means no load line calibration, the voltage stays at stock.
fff888 wrote:just brew it! wrote:voltage will droop due to electrical resistance of the power plane and CPU socket
It would be a big step for the computer industry to finally learn how to use superconductivity for the purpose of preventing any and all unwanted voltage drops in CPU sockets. So much money has been invested into such research, does anybody know any positive outcome?
just brew it! wrote:It sounds like LLC is a kludge to avoid having to implement a feedback mechanism (from the power pins at the CPU socket) to control the VCore regulator on the motherboard. IOW they're guesstimating how much the voltage will droop due to electrical resistance of the power plane and CPU socket, and boosting the output by a corresponding amount. They're trying to fix something in the BIOS firmware which really ought to be handled by a physical change to the design of the PCB and VRMs...
Re LLC overcompensating... it probably isn't, or at least isn't overcompensating as much as you think. Unless the sensor you're getting that readout from is on the CPU it will be measuring the boosted voltage, which will be lower by the time it goes through the resistance of the power plane and the CPU socket contacts.
When you're dealing with low voltages and currents approaching 100 amps, resistance of the power plane and the socket becomes very significant!