If you can get a Z590, might as well. Your right that it probably will have more features for Rocket Lake.

I’m in this boat too but a far a feeling it won’t be cost effective meaning paying 20% or more for 5% performance. I’m hoping that’s not the case but if it is I’ll just be buying a rebate z490 board and 10900k on rebate too. 

Bottom line, Z590 will give no benefit over Z490 for 10th gen CPU.
If you can get a Z590 that you want at the same price point as Z490, go for it.
If not, save a couple of bucks and get a Z490 board.

When they had sales on 10900k processors I couldn't find a Z490 Dark board for less then $500... do you guys know another spot?

RBAR support might be slightly better on Z590 though, most of the Z590 full features are available just paired with a Rocket Lake

11900K won't be day & night in games over 10900K, as a matter of fact, right now it's just below... :))
the new microcode will bump 11900K to 5.1GHz to be more or less on the same level as the 10900K, but the heat cost would require a beefy cooling, expect 1.35V to be a "good" voltage from now on, so 1.4+V will be something common I think
 
on the other hand, I experienced during time that initial batches are a bit worse in the first months, stuff bought after 4-5 months needed at least 0.05V less for the same frequency, so I'm not rushing anymore this time acquiring a new processor
for instance I bought last August a 10900K which barely did 5.0GHz on 1.35V, hot as frak, in October a bought another one which easily passes prime95 and so on just 1.25V
 
I'll probably switch my Z490 over Z590 (as mobos like Apex are not to be found after some time everywhere) and then wait for a while if 11900K will worth the swap as well
 

Man I need a Z590 Dark in my life so bad. I mean, this X299 Dark is forever my bae but I can't freaking wait for this badboy to pair with my 3090 K|NGP|N :)

wmmills

213NSX
Man I need a Z590 Dark in my life so bad. I mean, this X299 Dark is forever my bae but I can't freaking wait for this badboy to pair with my 3090 K|NGP|N :)

WOW, sounds like we have another hardware addict on our hands. We caught another one boys. Welcome to the basement of hell, where tech support lives and the hardware addicts that run it get all the wares they want and never WANT to leave! Muhahahahahahah

Ya man I need it so bad I just got a text from my brother who is at Ronler Acres right now :) You don't know how bad I need this lol.

If I'm not mistaken, one of the big upgrades is PCIe 4.0 support in the z590.

curious if the ram speeds work at full with 10th gen cpu's.

I still can’t wrap my head around the new 11900k actually being worse than the 10900k. I got a 11900k preorder too and may not even fulfill it. 

odd you tell me to chill on the rhetoric then say that you “know for a fact” it will be better. I‘m basing my comments on posted comparisons and tech industry opinions. Which I’ll reiterate I can’t understand how it wouldn’t be better, which is why I have one tentatively preordered. What articles have you seen it performing better? I understand the IPC uplift argument but I’ve only seen things like Adobe caring. I personally care about gaming performance. 
 

213NSX

Daviddswenson
I still can’t wrap my head around the new 11900k actually being worse than the 10900k. I got a 11900k preorder too and may not even fulfill it. 

Dude what are you talking about. Its not "worse" than a 10900K SMH. Maybe chill out with the unsubstantiated rhetoric tho? Get one yourself and bench it, play in games with it, do some daily driving with it, and then if you still want to you can come on here and start saying stuff like this if. Then, we can use stats and specifics and science instead of just fake news. I know for a fact that for the vast majority of users out there the 11900K will be "better" than a 10900K.

Saltgrass
I just tested (benchmarked with Time Spy) a Z490 board (not EVGA) with the 11th Gen processor and the RTX 3090.  I expected a performance boost from the PCIe 4, which was showing in the Nvidia panel, but it actually decreased.
 
I currently have a thread in the Graphics section to see if anyone knows why.   Is there actually some physical or electrical difference in the PCIe configuration between the Z490  and Z 590 boards that would make some difference?  
 
Beyond that, I am still wondering why there are no Z590 boards for sale.

I am running an 11700K on my Gigabyte Z490 and my PCIe bandwidth increased almost exactly by double confirming I am now running at PCIe 4.0 speeds. Are you using 3Dmark's PCIe bandwidth test or another test?