1 hour ago, omarsmak30 said:

Thank you for the detailed explanation, I was always with intel and their way of overclocking, I was very confused at first how does the undervolting with AMD works, but taking a step back, actually makes sense.

Now so far, I am running with -30 PBO offset and I think you are right, my cinebench results got a boost with the offset but MSFS, I can't really tell apart from my temperatures now look a bit cooled down in the avg of ~60-65 in contrast to before which was a bit hotter. But again, reading in reddit, looks like even 95c all day, is expected if you want to :D. 

Switching from Intel to AMD and seeing the incredible results in MSFS, Intel gotta push themselves hard to compete 😄

-30 seems great and good enough if you're stable. You could push it further but serious instability seems to really kick in at around this point. A good thing to do is to keep an eye on the Event Logs > Windows Logs > System for any WHEA-logger errors as these always indicate CPU instability.

The same logic of undervolting can also be applied to your GPU. At stock settings Nvidia GPU's apply massive voltages to ensure that the GPU is always 100% stable. This gives far higher voltages and temperatures than is necessary. At these higher voltages the GPU will eventually hit a power limit where the GPU is limited by the power coming from the PSU. At stock settings you actually lose potential performance because the GPU can't remain at its clock speed because it needs to constantly reduce voltage to account for it hitting this power limit.

Undervolting the GPU can really help performance although it does take quite a lot of testing. There is a sweetspot where you can even achieve a greatly increased overclocked GPU boost speed at a lower voltage providing stability is maintained. You'd be surprised how far away the stock settings are from this spot! This is worth a look if you have time and interest as many people will be running their GPU at higher temperatures and voltages for no reason.

Edited January 15, 20242 yr by G MIDY

14 minutes ago, BelgianTiger_2 said:

I'm planning the same upgrade actually with the same motherboard as well :). Was great reading this actually.
If i may ask,what did you chose as cooling? Air-cooled or AIO?Been reading a couple of threads and one suggest picking an AIO while the other mentions air-cooling is sufficient for this CPU.

I didn't buy new AIO, I am using NZXT X72 AIO from my intel build, just bought AM5 brackets. Been 4 years and I am happy with it :). 

I think is up to what you prefer, I personally don't like the air-cooled due to their massive size and now most AIOs are actually affordable. 

26 minutes ago, BelgianTiger_2 said:

I'm planning the same upgrade actually with the same motherboard as well :). Was great reading this actually.
If i may ask,what did you chose as cooling? Air-cooled or AIO?Been reading a couple of threads and one suggest picking an AIO while the other mentions air-cooling is sufficient for this CPU.

I don't think AMD 7800X3D need as extreme cooling as Intel's latest CPU's, I have a Noctua D-15 and it keeps the temp between 60-65 C in MSFS for me.

You can certainly use a good air cooler with this CPU.  I'm only using my water cooler because I had it already from my efforts to deal with the heat my old i9 10900k put off when overclocked.  Otherwise I would have just used air and kept it simple.

10 hours ago, mikeymike said:

Enjoy mate !!

I went from a 9900k to a 7950x3d

and wow 🤩 huge difference

6000mhz ram also with a 3080ti 

waiting till the 4090 drops a little and I’ll get one with an oled monitor 4k

 

mike

Mike any issues w/ 7950x3d I see some stuff about needing to tune for each app.  That can't be, or can it?  Some articles said better to go 7800x3D.  I'm planning a new build, or going to buy  preassembled for the first time since 1992 when I bought my first PC from a local builder.  

I wonder how important 24Gb of VRAM is.   Right now my 12Gb on fairly rare occasion gets too close to full so have to wonder if 16Gb isn't enough.  I'm using 3440x1440 display.

3 hours ago, omarsmak30 said:

Now so far, I am running with -30 PBO offset and I think you are right, my cinebench results got a boost with the offset but MSFS, I can't really tell apart from my temperatures now look a bit cooled down in the avg of ~60-65 in contrast to before which was a bit hotter. But again, reading in reddit, looks like even 95c all day, is expected if you want to :D. 

Thermal max for the 7800X3d is 89C at which point it starts throttling.  I'm wondering how they think they're getting 95C?   They might be using a non-3D cpu (they have a higher max)?

39 minutes ago, Noel said:

Mike any issues w/ 7950x3d I see some stuff about needing to tune for each app.  That can't be, or can it?  Some articles said better to go 7800x3D.  I'm planning a new build, or going to buy  preassembled for the first time since 1992 when I bought my first PC from a local builder.  

I wonder how important 24Gb of VRAM is.   Right now my 12Gb on fairly rare occasion gets too close to full so have to wonder if 16Gb isn't enough.  I'm using 3440x1440 display.

I am not Mike, but have a 7950x3d. No issues at all, and as a benefit you can use the non 3d cores for the apps running in the background.

I manage to get at Asobo's Miama Airport runway 27 to be cpu limited at 107/108 fps on Ultra ( put renderscale at 70 and voila you are cpu limited). This in the Fenix, no traffic at 12 noon. Even the Fenix background apps I put on the non 3d cores. Using the IGPU for the Fenix displays.

Don't compare temperatures from X3D processors to any other processors, it's not apples to apples. The 3D cache lies above the actual CPU dies, thus creating a 'blanket' of sorts that makes it harder to dissipate heat directly. So you'll see higher and faster spikes even though it's a much lower TDP chip.

The chip is MEANT to run at high temperatures and if you do the PBO undervolt, it'll still run high but boost longer.

Edited January 15, 20242 yr by Sethos

2 hours ago, Noel said:

Mike any issues w/ 7950x3d I see some stuff about needing to tune for each app.  That can't be, or can it?  Some articles said better to go 7800x3D.  I'm planning a new build, or going to buy  preassembled for the first time since 1992 when I bought my first PC from a local builder.  

 

I was in a similar situation, saw tons of videos about this and reddit and the general agreement is that 7800x3D outperforms 7950x3d for some reason. But honestly for me the motivation the 7800x3D was a deal when I snatched it 😅. But with confidence, I don't think you'd regret if you go with either 7800x3D or 7950x3d, especially I see you are using the same i9-9900 as mine, you'd be shocked when you fly with MSFS after the upgrade lol (the hype around 7xxxX3D is real :D). 

59 minutes ago, omarsmak30 said:

I was in a similar situation, saw tons of videos about this and reddit and the general agreement is that 7800x3D outperforms 7950x3d for some reason.

From what I gathered the 7800X3D slightly outperforms the 7950X3D in "normal" games, but the 7950X3D has an edge over the 7800X3D in MSFS-specific tests I've seen, likely due to the larger L3 cache.

This is really crazy! Testing my PBO offset -30, sitting at FlyTampa KLAS with Fenix, ultra settings and FSLTL (moderate settings), getting around 45-50 fps, CPU temperature very low 55 to 60. Now the GPU what is holding the CPU back when the VRAM starts to filled up. Very amazing CPU indeed!! 

Do you think upgrading from a AMD Ryzen 7 3800X 8-Core Processor  3.89 GHz would make a huge difference

64 GB ram

4070ti card

Asus X370-A Motherboard

Ron

 

5 hours ago, Ron Lefebvre said:

Do you think upgrading from a AMD Ryzen 7 3800X 8-Core Processor  3.89 GHz would make a huge difference

Yes, absolutely. Your CPU is even slower than his 9900K.

Also, 64 GB of RAM are useless for gaming and often prevent you from meeting the XMP/EXPO limits.

6 hours ago, MrFuzzy said:

Yes, absolutely. Your CPU is even slower than his 9900K.

Also, 64 GB of RAM are useless for gaming and often prevent you from meeting the XMP/EXPO limits.

Do you guys think the Asus X370-A Motherboard is good enough or will even work

I cant afford to change both.

Ron

1 minute ago, Ron Lefebvre said:

Do you guys think the Asus X370-A Motherboard is good enough or will even work

I cant afford to change both.

Ron

For the 7800X3D, you will need an X6 series motherboard.