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FRONTPAGE AMD Ryzen 9 7900X and 7700X Review: The Dawn of ZEN 4

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Johan45

Benching Team Leader Super Moderator
Joined
Dec 19, 2012
All of the Gen 5 links come from the CPU, 16 for graphics and 8 for storage regardless of the chipset. It'll be up to the vendor how it's laid out
 
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SF101

The Printer Guru
Joined
Feb 9, 2002
Which would not really bode well for next 3-4 years from now GPU's they will likely be pcie 5.0 - also my nvme pcie-4.0 drives are great but I wouldn't mind tossing a 5.0 in when they come out.
I had this same issue with my X299 (PCIE-3.0) it just feels bad esp when were talking 250+$ Mobo's with a PCIE-4.0 slot.
Am I the only one that's starting to feel things have got a bit out of control.

I can understand on the Sub $100 or so business boards but anything else?
 
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EarthDog

Gulper Nozzle Co-Owner
Joined
Dec 15, 2008
Location
Buckeyes!
Yes. Not all of the 1st PCIE slots will be Gen5 though. Costs savings by staying Gen4 spec.
IIRC, all X670 boards will be PCIe 5.0. B650E/B650, particularly the low end, is where you'll start to see a mix.

Which would not really bode well for next 3-4 years from now GPU's they will likely be pcie 5.0
PCIe 3.0 x16 only limits high-end 3000 series by like a couple of percent (at most, depends on res, etc). I'm imagining the same thing again in 3-4 years with PCIe 4.0 for the GPU.

Am I the only one that's starting to feel things have got a bit out of control.
Nope.
 

SF101

The Printer Guru
Joined
Feb 9, 2002
IIRC, all X670 boards will be PCIe 5.0. B650E/B650, particularly the low end, is where you'll start to see a mix.


PCIe 3.0 x16 only limits high-end 3000 series by like a couple of percent (at most, depends on res, etc). I'm imagining the same thing again in 3-4 years with PCIe 4.0 for the GPU.


Nope.
I know man I know its like.. Pcie 3.0 is ok and 4.0 is now everywhere but it still feels odd when we are doing 4.0-5.0 and we are still friggin around with 3.0 and 4.0 on the main pcie.
I bought my x299 platform used so I got a great deal and I didn't complain my 7900x oc'ed ok but not great and it was in my opinion a hot running setup with less performance to its rivals.
4 channel ddr4 didn't live up to its hype either if it did then it would still be a strong platform.

But this is new Stuff.. And we all have seen why adding next tech is good especially considering now the 5800x 3DCahe, CPU that's sold out... because that platform in the 4.0 pcie gen is not lacking for anything atm its a example of future proofing that we haven't seen before.

4.0 PCIE isn't horrible by any means but it should be on budget units only.
 

Woomack

Benching Team Leader
Joined
Jan 2, 2005
Any word on when they're dropping a 7xxxG CPU? My one main gripe with my HTPC right now is fan noise, so anything I can do to drop that is a plus.

Since 7000 series have integrated graphics then I'm not sure if they release G/APU as a separate product. You can always wait a bit and get Ryzen 3 with graphics that will be probably 60W TDP.
 

Woomack

Benching Team Leader
Joined
Jan 2, 2005
Somehow, the same story is for 2 gens for AMD, and Intel ;) Undervolted are boosting higher. I guess they can't set lower voltages at default because of the range of chip quality. I mean, some may like lower voltages, some not much, or will be at the edge of stability. Most will probably still run fine at much lower voltages.
 

Voodoo Rufus

Powder Junkie Moderator
Joined
Sep 20, 2001
Location
Bakersfield, CA
I saw and liked that video. Overclocking is definitely taking a different route with modern GPUs and now CPUs. Undervolting to get more clocks out by reigning in temps instead of throwing voltage at stuff until it breaks.

And yes, there are X670 and X670E versions. You can find less expensive boards with PCIE4.0 GPU slots on the X670 side. Why you would do this if upgrading a whole platform I have no idea. Considering one needs new ram to go with the CPU and motherboard anyway, I'd rather pay up for Gen5 future proofing.
 
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SF101

The Printer Guru
Joined
Feb 9, 2002
7600X -PBO on I ran CPUZ stress test for 10 min - 76*C 5.45 (ish Ghz all cores ).
Seems like at this point if I want more ill have to play.
That's still pretty stupid performance out of box with basically no effort.
 

SF101

The Printer Guru
Joined
Feb 9, 2002
After fresh reinstall this morning..
She didn't quite seem right after migrating os from the x299 setup
Ill play more tonight .. time for work
 

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SF101

The Printer Guru
Joined
Feb 9, 2002
Johan your oc you just disabled pbo and manual clocked it ?
With PBO mine is capping at 5.5ghz after touching the bclk 2 (1 in asrock case) or 5.490 if i dont touch bclk 2 both seem to hit a cap either way.

So far im not finding any gains with negative cpu boost override offset like some see only losses especially on the minimum boost rates .. but then again temps are all under 80 usually 75ish *C.

I got lost on the curve optimization a little i didnt see the changes expected on that either. (I have a feeling this is one of my main problems). This and finding the correct cpu offset mode in asrocks bios.



NGL Ocing on this sofar has been a bit confusing lol coming from intel and the termology on asrock isnt exactly the same as asus - gb-msi which most of the bits and peices of guides are done on. I have a feeling total core count maters for setting curves also but still looking into that.
 

Janus67

Benching Team Leader
Joined
May 29, 2005
I thought it could be interesting as it's quite a unique product:

I had wondered how long it would take for a product like that to come out, obviously, not long. It worried me seeing the open-ness of the IHS from the first screenshots of the CPU.
 

SF101

The Printer Guru
Joined
Feb 9, 2002
While putting the Thermaltake version of liquid metal on I was extra careful lol.
I can see how that would be useful.
 
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Johan45

Benching Team Leader Super Moderator
Joined
Dec 19, 2012
Johan your oc you just disabled pbo and manual clocked it ?
With PBO mine is capping at 5.5ghz after touching the bclk 2 (1 in asrock case) or 5.490 if i dont touch bclk 2 both seem to hit a cap either way.

So far im not finding any gains with negative cpu boost override offset like some see only losses especially on the minimum boost rates .. but then again temps are all under 80 usually 75ish *C.

I got lost on the curve optimization a little i didnt see the changes expected on that either. (I have a feeling this is one of my main problems). This and finding the correct cpu offset mode in asrocks bios.
I just manually set all-core to 56 and set the voltage to 1.3, probably could use a tad more.
Typically the curve settings in BIOS allow an offset for voltage, personally, I don't find many of the AMD gimmicks work overly well like the boost override and scalar settings. Maybe it was just my board/BIOS but it made no difference in benchmarks. Running the per-core optimizer from Ryzen Master did make a decent difference in performance on the 7900X (5.2 all-core moved to 5.4 ish) never tried any others.
When doing these reviews time is always short so there isn't a lot of time for experimentation. I have the 7950X and 7600X here now but Raptor lake samples will be shipping very very soon so not sure I can get an article out before I need to test those for the deadline of Oct 20.
One thing I have noticed is all of the CPUs seem to tap out around 5.5 GHz aside from the 7600 which managed another 100 MHz, the 7950X ended at the same speed during my testing. The multi-core performance is outstanding.

5.5 oc.jpg
 

SF101

The Printer Guru
Joined
Feb 9, 2002
Not bad I guess .. I can daily this actually .. gonna game on it a bit.
 

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Woomack

Benching Team Leader
Joined
Jan 2, 2005
I finally got a motherboard as the CPU was here since day 1 - Crosshair X670E Gene, and the older test OS even started without any issues.
I barely had any time to run tests. During Cine R23 at auto setting, the display on the AIO was showing up to ~78°C during single benchmark passes (ASUS 360 AIO cooler). Somehow ASUS enhanced mode and performance options didn't change anything. The CPU boosts up to 5.79GHz on single cores (7950X). A quick test at -30mV showed no difference in Cine R23 scores.
It looks like we are back to fclk, IMC, RAM, and other magical ratios. RAM won't really run past 6400, or I get a 00 error and have to reset CMOS. It also didn't want to run at CL30, and XMP 6600 settings at 6400 give somehow low RAM bandwidth and higher than expected latency.
I'm curious how it will act at non-synchronous ratios and a much higher RAM clock.

A quick conclusion after ~2h of OS/software updating and some tests. Everything so far works much better than it was after Intel 12 gen/Z690 premiere. RAM performance is surprisingly low, but it may improve with the new BIOS/AGESA. I mean 20GB/s bandwidth difference between Intel and AMD at about the same RAM settings is a bit too much.
I haven't noticed any stability issues or other unexpected behavior. At least I don't feel like a beta tester again.