GPU USELESS For Lightroom Classic!

Started 3 months ago | Discussions thread
OP Batdude Veteran Member • Posts: 4,946
Re: Never mind

IanYorke wrote:

Simon Garrett wrote:

Batdude wrote:

Batdude wrote:

I feel like something is wrong. Maybe my PC hasn't been set up properly, I don't know what it is but I have that gut feeling that something is not right.

I did a really quick test, and this is something I have done hundreds of times with the i7-6700K I had. After exporting all the 1900 jpeg photos to a folder, there I tried copying and pasting those 1900 photos to a different folder to start separating stuff for my customers, from the same M.2. Folder to folder. I actually just tried both M.2 SSD C: drive and my second M.2 SSD for storage.

Found some interesting stuff and looks like the XMP in the BIOS was disabled and the RAM speed was set to 2100MHZ. Enabled it and the 3600MHZ kicked in. Big difference and now is copying/transferring much faster so that's fantastic.

For some reason it feels like my i7-6700K is faster. I recall that every time I did that with the intel transferring the photos was almost immediate and you wouldn't even see the copy transfer window. With my new Ryzen 3900X system is taking five entire seconds. I feel like something is REALLY wrong here.

The PC shop where I had it built is closed tomorrow so I'll have to wait til Monday to take it back but meanwhile can you think of anything that could be wrong with this? I just cannot believe that this Ryzen CPU is behaving much slower than the i7-6700K. I mean, every single component is much newer at double the speed. Perhaps I'm not having a "lightroom" problem but something else instead???

Any windows/AMD experts out there?

I also went ahead and tried exporting the 1900 images all over and this time it took 11:40 compared to the 15 minutes I was getting before enabling XMP. This is more like it

What motherboard are you using?

I have an Asus (X570-F Gaming), and apart from turning on XMP (called DOCP in Asus boards), I reduced VDDCR by 0.1V.

Googling, I found bloggers saying that, compared to Intel processors, AMD processors tend to throttle back clock speeds more to limit temperatures and powers. Asus (and perhaps other mb makers) set VDDCR rather high by default, which reduces the risk of blue screens, but increases power consumption (and temperature) and thus means that multi-core speed may be reduced as the chip throttles back more. In Asus mbs, the setting for VDDCR allows "Auto", "Manual", or "Offset". If you choose the latter you then choose "+" or "-", and then the offset value (e.g. "-" and 0.1V). It can probably go lower, but I haven't tried. It's completely stable at an offset of -0.1V on mine, and multi-core benchmarks are a few percent higher. Marginal, but why not if it's stable?

You might find other motherboard settings with safe but non-optimal defaults.

Have you tried optimising the 3900x by setting the speeds for the 2 chiplets differently? AMD bin the chiplets so that you get 1 strong chiplets that meets the highest boost speed spec and another chiplet

Thus you can get 1 chiplet running at a higher speed than is possible with an all core clock where the weak chiplet restricts speeds.

Thus you get one 6 core cpu running at 4.35GHz and the other at 4.15GHz at lower voltages and power.

All can be done in Ryzen Master so more convenient than BIOS.


Hello Ian and thank you,

no I haven't. I just got the system and started running stuff that I normally do and that's why I'm seeing that there is (some) speed missing here, coming from an i7-6700K (never over clocked it) and since I'm not a computer expert I'm not familiar with optimizing the 3900X. I did check some basic stuff in windows and found something in youtube that mentioned that XMP setting and it actually worked.  That was kind of like a miracle for me

I did have one question regarding XMP. In the Gigabyte MB BIOS when enabling XMP it automatically selected it's own settings and this is what's there now:

DDR4-3600 18-22-22-42-68-1.35V

I did go to the AMD website and there they provide a specific number for the specific RAM that I have, it is: 3600/17-19-19-39. What do these numbers mean and why is the one in the BIOS different? Do I just ignore that?

Regarding optimizing the 3900X I guess I can call tech support on Monday so that they can help me with that.

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