tps3443

Well I’m only running DDR5 6000c26 daily, so I don’t have to push high VDD’s like that. But yeah 7600c38 32k trefi needed like 1.700v when I was messing with it yesterday. 1.650 doesn’t work. This gave me the feeling that IMC is weak.

Seeing how well ram tuning posting and stability responds to adding memory voltage, I am definitely pointing to a weak IMC. It’s like 6000c26 boots fine with auto 11K tREFI with 1.435v VDD. EASY EASY. 32K tREFI? It won’t attempt to post, adding 32k tREFI puts a much heavier load on IMC, but adding voltage to VDD. Quick and easy bump up to 1.450v VDD gets it done! 65k tREFI fully tuned timings? Similar situation. I need 1.480v VDD. Probably can get away with 1.460vdd. But it’s all too familiar! And it put me right back in the seat of tuning on Intel with DDR5. Weak IMC’s loves high or too much VDD/ VDDQ. And that’s my system to a T lol. 😂 @Mr. Fox I’m going to swap it out for another. I’d like 2,200FCLK AS WELL. I’ll see how the next one runs. It’s a BEAST in games doing one thing at a time producing a high FPS though. That’s its main benefit. It’s not as fast as my Xeon doing brute work handling multiple things at a time. Like leaving a game minimized and doing other things simultaneously etc. it’s just not as fluid as my 28/56 Xeon 3175x is. That could be partly due to lower bandwidth, maybe higher latency, or merely due to being two CCD’s? Either way. Gaming performance is great! And that’s what I wanted to see.

I think my 9950X3D2 has a weak IMC. Different bios doesn’t help. Max 1:2 speed I can boot is DDR5 7600. Either weak IMC, or my 6000c30 A-die kit is just at the limits? I’ve tried like 1.5v VDDIO LOL 😂 1.300v VSOC UP to 1.650v VDD/VDDQ. Nothing helps. 7600 max, and that’s hit or miss, 7400 posting works every time. I tried to use some preset timings. And that did not help either. Is it possible to have a crazy weak IMC on my 9950X3D2?

Yeah this thing is funny, it likes those higher 1:1 speeds better than higher 1:2 speeds. Based on what I am reading, I am seeing that some of these IMC’s may like faster 1:1 speeds, while simultaneously NOT liking faster 1:2 speeds. 6600@1:1 is not actually stable. But I can try and see if I can get it stable, probably can’t. But maybe with voltage tuning, tuning timings etc. I was really pushing the FCLK, and I hear that also impacts your 1:1 max edge speeds stability as well. But I have been just gaming with running regular speeds. As far as easy stability goes like set and forget. 2167 fclk and 6000c26 @1.450v VDD, or 1.400 VDD with 32k tREFI works, with a 65,535 tREFI. This setup runs very easy without tuning voltages or anything. I may swap the CPU for another. But being honest. I don’t mind too much. I’m pretty much okay with how it performs even stock. If I return anything, I may try a 270K Plus as well! 😄

I almost bought that Vcolor kit! I thought it was suspiciously priced low. I suppose that’s why? Because it’s dual rank 16gigs? Have not tried the bios yet. But, I will soon. Being lazy. I am testing a 6600c28 though!

What about the faster 1:1 speeds? Im testing 6600c28 right now. How would those compare VS. like DDR5 8000+ in 1:2 speeds?

So I’m pushing 1:1 speeds to check IMC limit and fabric limits. I can run 2,167 fclk which seems to work well, and DDR5 6600c32 1:1. Right now I’m trying to dial down to C26 or maybe c28. The lil ram fan helps too lol!

Looks like fun to me! I almost went with one of these. Multithreaded performance is really good on these.

I’m shocked they started doing dual rank 16GB DDR5 sticks lol. That’s so cheap of them! Lol. 😂 So these sticks should be good for 8000 at least is what I was thinking, I’m going to try a different bios. If that does not help me, then I may exchange the motherboard and CPU at the same time, the 9950X3D2 has pretty high SP’s on both CCD’s. Whatever I get after that, I’m just going to roll with it. 😎

These are single rank sticks. I specifically bought these because they were Hynix A die 5.43.01. Hopefully they are alright OC wise.

Okay, I’m going to try that bios! And @electrosoft I may try another 9950X3D2. If I’m feeling up to it. Memory tuning is very fun. But I learned that it does not help much in real world gaming performance, I suppose IPC is the real king for high fps and pushing fast GPU’s. My Xeon w3175x is a memory performing beast. When I would run only 6x16GB (96GB total) I can do 1T stable, and this does like 172GB bandwidth and 45ns-46ns latency. And it just cannot hold up to anything modern with the words X3D even with a single stick of DDR5 4800 lol. It’s a powerful rig, and still did well in many titles especially those more uncommon “Well Optimized titles”. 😂😂😂 These X3D chips are ridiculous in gaming. I did not realize how many CPU limited games I do play. Almost everything is CPU limited with a 5090 Astral, even with 4K. Rust, Oblivion, Ark, blasting some crazy frame rates with 9950X3D2. @Mr. Fox Are you thinking my Dark Hero should also run 8000c34 just like your Apex can?

Okay! I will try that. Let me check the memory as well.

I don’t think 2200fclk works. But I haven’t tried really messing with it much either. I do see 2,167 fclk works at least. I feel like I really suck at messing with this thing lol. I saw DDR5 7600c34 posted up and works. But couldn’t get anymore. Need to loosen timing or add more VDD/VDDQ.

I cannot get any Gear 2 memory speeds beyond 6000 to run at all, just fails to post. What am I doing wrong? I have set these settings: Asynchronous mode fclk 2000 DDR5 6200/6400/6600/6800/7200/8000 etc. (I tried all these speeds slowly working down) bclk 1: 100.00Mhz bclk 2: Auto uclk Div1 mode=MEMCLK/2 loosest timings imaginable. I cannot get a post. CPU SOC Voltage: 1.200-1.260v tried these ranges. CPU VDDIO/IMC voltage 1.300-1.400v tried these ranges. @Mr. Fox EDIT: I got it!!! I just posted DDR5 7,000. Will slowly work up with some loose timings, then try to tighten. 2nd EDIT: I am having a hard time posting past 7,000 3rd EDIT: I GOT 7400c34 To post and train. 4th EDIT: I got 7600 posted. Still slowly working up in frequency.

I’ll mess with it some more. When I enabled high priority it does hit 46K at least. Not sure if that helps, as I’m just using a stock retail Win11 OS. Anyways, I’m messing with ram tuning right now. I just let the chip run stock for the most part trying to memorize and learn AMD things. Good news is my ram booted right up at 6000 CL26-36-36-36-96@1.435V. My motherboard seems to be responding a little bit better as time has gone on. It might be okay after all. I see training and posting with high tREFI is much easier with more VDD/VDDQ voltage. So, like 6000c30 with 65K tREFI won’t post with 1.400v VDD/VDDQ. But it will post with 1.435v VDD/VDDQ. I know how DDR5 was with Intel, and it was heavily dependent on your IMC quality. Like one CPU may do 6000c30@1.35v and another CPU wants 6000c30@1.400v. That’s what I learned with Intel anyways, the CPU IMC quality determines how much voltage your DDR5 rams would need. This made it incredibly difficult to bin ram sticks in my opinion. Because an amazing IMC would make average DDR5 look like super sticks or something.