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Is SVI3 The Best Way To Measure AMD CPU Voltage?

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Gordon had a chance to chat with Aris from @HardwareBusters at Computex 2023 about SVI3 and whether it’s the best way to measure AMD CPU voltage.

Read the SVI3 article:

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32 Comments

  2. Siv system information viewer ,is great app show every sensor on pc , it is been for years why not many knowing about it? very easy to read. the hwinfo is great but difficult to read all this readnings.

  3. Power Connectors make noise? no they don't. those Clips are made to be inexpensive, they don't click.
    maybe lab samples do, but not the stuff People actually use.

  4. Too much talking. I got through about 4 minutes without hearing very much, and for a person who learned how voltage delivery works to do my job and have understood it for 40 years now I got bored. Most everything said is trivial, at least up to the point I stopped watching. Too much about needing a good PSU. Sure, that's true. It has nothing to do with the topic of measuring CPU voltage.

    It doesn't really matter than much where you measure CPU power consumption as long as it's ACTUAL power going to the CPU. It certainly doesn't matter enough to have Youtuber wars over it. Steve at GN does a perfectly fine job measuring at the power rail. The fact is very little power is lost through the regulators or VRMs, unless you have a really bad board with bad components and Steve doesn't use bad boards for a testing platform. His measurements are very close to Techpowerup The issue is being consistent so a comparison can be made.

    A BAD way to measure would be to open up a PSU and measure the inputs to the transformer, which is the step down from one level of AC to lower level of AC which then feeds into a rectifier that does the initial conversion to DC. Once you eliminate the whole PSU from the power consumption values, you're close enough.

    Power consumption is determined by the load, in this case the CPU. A load pulls the amount of power it needs from a source. A source can only deliver what's being pulled unless there's a problem in the circuit, so normal ops of power delivery Yes, having a good PSU matters, but it's not going to affect the readings for power going to a CPU except in a VERY trivial way, because once again it's up to the load, not the source on how much power is being delivered. So wherever this conversation was going I don't care. One set of VRMs will consume a SLIGHTLY different amount of power than another set, which is why testers want to use a quality MB when testing, and most MBs have a good quality set of VRMs. Being ABSOLUTELY PERFECT is just about impossible. Being within a couple or three watts (more when the consumption is higher, much closer to actual when the consumption is small unless once again you have cheap VRMs) is good enough, and including the small level of VRM power consumption is trivial.

  5. I'm not sure have as much trouble with accepting amds voltage measurement when the target voltage is given by amd.

    In a sense what we're concerned with in this situation is a relative voltage measurement not an absolute one.

    At least that's how I understand it, if I'm wrong someone pls correct me. 😊

  7. I wish PC World videos had captions. I'm not a native English speaker so it is sometimes difficult for me to understand what they are saying, either because there is a lot of background noise or because the invited speakers are not native English speakers either and speak with a very thick accent like in this case. I love your content, btw, Gordon!

  10. Not true it is the CONNECTOR If you can plug it out partly which cause it to melt while th lock is still locked that means there is a problem with the lock itself and it doesn't lock the connector at the end only halfway.

  13. I have asked is my 3900xt safe the x570 asus tuff motherboard goes to 1.4+ all the time i have tried to cap it at 1.35 and it wont

  14. Thanks for info guys. Can you please clarify SVI3 is relevant for all Ryzen CPU?
    I have Ryzen R9 5950X + Asus X470 Pro with the latest BIOS update and latest drivers. I use HWiNFO64 v7.46-5110 and there is no SVI3 at all! Only SVI2 TFN.

  15. Your own video on the MSi PSU with the yellow connector showed the issue that just making sure it's connected isn't enough. There's too much play on the connector and it needs to be revised with a better latching mechanism. Seeing this doesn't give me a lot of trust on 12VHPWR especially at the PSU side where it could easily become unseated, even though it's fully latched and burn up on the PSU side. I guess what MSi is doing is great on the GPU side where it's easy to see, but it's just a band aid. This clearly is NOT user error. It's just poorly designed and need a revision with better latching accounting for at least half to two thirds the total length of the connector, or latches on both sides, to prevent the connector from being able to move once it's latched.

    Outside that… great info on the voltage side of things with AM5.

  18. We hope PCWorld viewers now take more caution in simply believing hyperbole channels like Gamernexus. Wait for more information, visit official channels. GN cannot wait, wanted to catch the big news for views, and made a mess out of their Asus AM5 AMD series of videos. It is also pity Steve did not post corrections or even vested Asus booth at Computex to apologise. So much anger and arrogance in Steve Asus videos, where is he now?

  24. Nope. You measure at VDDCR_SOC_SENSE and VSS_SENSE_A, pins M22 and M21 on the AM5 socket, as close to the socket as possible with an oscilloscope limited to 20MHz. These are sense pins that do not carry significant current and can accurately indicate CPU intenal voltages. PC world should stop boosting grifters like this guy and GamersNexus

  25. 9:00 The one big problem with LGA is that after a few years the cost/value of the motherboards far exceeds the cost/value of the CPU.
    ie after 5 years or so the motherboards increase in value while the cpu's decrease in value….LGA makes that a bit worse as people are prone to breaking those sockets.

  28. We need Sacha Baron Cohen at Computex making a documentary of BS marketing on technology…who cares on power supplies? How do they cost more than a cpu or gpu? Is there any actual technology being presented there?

  30. My friend has two monitors for me. He wants to sell both for the same price. The options are:

    Gigabyte M32U

    BenQ MOBIUZ EX3210U

    Which one should I choose?

    I mostly do programming work, typical PC tasks, and approximately 30% gaming. My current rig consists of an RX 6800 XT and a 7800X3D paired with 64GB of RAM.

    I can get them for a really cheap price, so I need to make a quick decision."

  31. In HWInfo64, SVI3 is listed on many different items. There is CPU VDDCR_VDD Voltage (SVI3), CPU VDDCR_SOC Voltage (SVI3), CPU VDD_MISC Voltage (SVI3), CPU Core Current (SVI3), and 8 or so more. So which in HWInfo64 is the one we should be keeping an eye on for this? I don't see just a SVI3 anywhere.

    I boot up HWInfo64 first on my pc. Windows loads, and then I'm opening HWInfo64. It is an amazing tool that all pc users should use IMO to monitor their pc and hardware, but it also has an overwhelming amount of info for the average joe.

    As always, great content and thank you for sharing!