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post #21 of 55 (permalink) Old 07-21-2020, 08:56 PM
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Quote: Originally Posted by BroadPwns View Post
Eh, no. Don't. VRM on that board is utter trash that can throttle with... stock 9600k.
I could see a 9900k pushing things too far, but it seems to do ok with an 8700k here: https://www.anandtech.com/show/12963...board-review/8

All core turbo on the 8400 looks to be 3.7Ghz, so it seems like dropping in an i5-9600k and overclocking to around 5ghz would be a worthwhile upgrade for the cost. A used i7 8700k might be worth it too if you can find one that is reasonably priced.
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post #22 of 55 (permalink) Old 07-21-2020, 11:18 PM
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I wouldn't bother with an i5-9600K. You're only gaining some clock speed at that point. If you aren't adding cores and/or threads, it's not worth it.

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post #23 of 55 (permalink) Old 07-22-2020, 01:20 AM
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Quote: Originally Posted by blu3dragon View Post
I could see a 9900k pushing things too far, but it seems to do ok with an 8700k here: https://www.anandtech.com/show/12963...board-review/8

All core turbo on the 8400 looks to be 3.7Ghz, so it seems like dropping in an i5-9600k and overclocking to around 5ghz would be a worthwhile upgrade for the cost. A used i7 8700k might be worth it too if you can find one that is reasonably priced.
There is just one, tiny issue - they don't monitor VRM temps.

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post #24 of 55 (permalink) Old 07-22-2020, 09:45 AM
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Der8auer tested the MSI Z370-A Pro along with budget Z370 boards from ASRock, Asus, and Gigabyte. In his tests, the MSI board was capable of running 5.1 GHz with the i7-8700K without additional VRM cooling. He measured the VRM temperature at 101° C. That's acceptable, though not ideal. Some airflow over the VRM heatsinks would help out quite a bit. I would not bother trying an i9-9900K because the power draw is considerably higher.

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post #25 of 55 (permalink) Old 07-22-2020, 05:43 PM
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Quote: Originally Posted by chessmyantidrug View Post
I wouldn't bother with an i5-9600K. You're only gaining some clock speed at that point. If you aren't adding cores and/or threads, it's not worth it.
My thinking with the 9600k is that for around $200-250 you end up with a 3.7-> 5G all core clock speed improment. That's around 35% which will benefit anything that is cpu limited and not just the apps/games that can use more cores... The i5 is 6 cores 6 threads. Right now it seems like there is not really any gain in games past 6 cores, 12 threads. So, there is some value in going for an i7 8700k, but even that is already at the point of diminishing returns. Yes, this will likely change in the future, but then those newer games are also going to be more GPU limited at 1440p.

Maybe a 10600k + $200 z490 board, and then op sells the original cpu + mobo to recoup some of that cost.

Or then a 10700k +z490 for a more future proof option that would also perform really well out of the box without overclocking.
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post #26 of 55 (permalink) Old 07-22-2020, 05:44 PM
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Quote: Originally Posted by chessmyantidrug View Post
Der8auer tested the MSI Z370-A Pro along with budget Z370 boards from ASRock, Asus, and Gigabyte. In his tests, the MSI board was capable of running 5.1 GHz with the i7-8700K without additional VRM cooling. He measured the VRM temperature at 101° C. That's acceptable, though not ideal. Some airflow over the VRM heatsinks would help out quite a bit. I would not bother trying an i9-9900K because the power draw is considerably higher.
Good data, thanks
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post #27 of 55 (permalink) Old 07-23-2020, 12:03 AM
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Quote: Originally Posted by blu3dragon View Post
My thinking with the 9600k is that for around $200-250 you end up with a 3.7-> 5G all core clock speed improment. That's around 35% which will benefit anything that is cpu limited and not just the apps/games that can use more cores... The i5 is 6 cores 6 threads. Right now it seems like there is not really any gain in games past 6 cores, 12 threads. So, there is some value in going for an i7 8700k, but even that is already at the point of diminishing returns. Yes, this will likely change in the future, but then those newer games are also going to be more GPU limited at 1440p.

Maybe a 10600k + $200 z490 board, and then op sells the original cpu + mobo to recoup some of that cost.

Or then a 10700k +z490 for a more future proof option that would also perform really well out of the box without overclocking.
I'm having a hard time following your logic. The i5-9600K can achieve higher clocks, but gaming at 1440p isn't as impacted by the CPU. If I'm upgrading the CPU, I'm adding cores and/or threads. I wouldn't consider the i5-9600K enough of an upgrade because you're only gaining clock speed, which already isn't a problem. The most logical upgrade would be an i7-8700K. There's not just some value, there's all the value. Upgrading to an i5-10600K requires a new motherboard, which I guess selling the i5-8400 and MSI Z390-A Pro would help offset, but neither of those is worth a whole hell of a lot. It doesn't make sense to swap motherboards to achieve performance you can get without swapping the motherboard. The i5-10600K is basically an i7-8700K on a different socket. Why change sockets instead of just getting an i7-8700K?

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post #28 of 55 (permalink) Old 07-23-2020, 09:35 AM
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Quote: Originally Posted by chessmyantidrug View Post
I'm having a hard time following your logic. The i5-9600K can achieve higher clocks, but gaming at 1440p isn't as impacted by the CPU. If I'm upgrading the CPU, I'm adding cores and/or threads. I wouldn't consider the i5-9600K enough of an upgrade because you're only gaining clock speed, which already isn't a problem. The most logical upgrade would be an i7-8700K. There's not just some value, there's all the value. Upgrading to an i5-10600K requires a new motherboard, which I guess selling the i5-8400 and MSI Z390-A Pro would help offset, but neither of those is worth a whole hell of a lot. It doesn't make sense to swap motherboards to achieve performance you can get without swapping the motherboard. The i5-10600K is basically an i7-8700K on a different socket. Why change sockets instead of just getting an i7-8700K?
OK, there are many ways to slice this... I agree that more cores are better, but my point is that they are not used completely by everything, and games are one of those cases where the scaling is not linear (i.e. double the cores is not going to double the frame rate).

When I did a quick search, an i5-9600k showed up for $200 where I am. That's a 37% cpu performance boost if you assume it will overclock to 5GHz, and that performance upgrade does not depend on the application being able to scale to more threads.

I think 6 cores at 5Gz at 1440p will be almost completely gpu limited with a 2070 super. Or at least close enough to not matter (maybe 6 cores at 3.7GHz already is, but I was assuming not). So, for games today, this seems like the best value option. Most of the performance of any available cpu, with relatively low cost. The only downside is that it won't scale as well for future games with a possible future gpu upgrade.

6 cores, 12 threads (aka i7-8700k) is going to be a little faster in games that can take advantage of more threads in non-gpu limited cases. And more future proof. BUT, that cpu seems to be going for $300-400 on the used market right now. I completely agree an 8700k would be better if the price is right, but at current used prices I started to think about upgrading the motherboard (and selling the old one to recoup some cost). Note: I didn't do much research on prices, and so with a little patience this could well be the way to go.

So yeah, lots of options. If the OP is willing to OC, and can find a 9600k for a good price, then that will likely give 90-95% of the performance of any cpu in games at 1440p today.

Not willing to OC, then something else might be better.

Or, wait until later this year, when next gen cpus are announced. Actually this is probably the best option unless there are some specific cases today where the OP is running into cpu limits :-)
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post #29 of 55 (permalink) Old 07-23-2020, 09:59 AM
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Quote: Originally Posted by iARDAs View Post
Hey guys. I have a 3 years old 8400 CPU. I was wondering if I should upgrade to 9900k? And would the upgrade be worth it in games etc?...

I have a 144hz 1440p monitor with a RTX2070 super.

The reason I wanted to go for 9900k instead of 10900k is that I can still use my current mobo with the 9900k if I am not mistaken. Since they are both the same motherboard family.
Don't make the same mistake. Get the 8700K. Forget the 6 core without Hypethreading. Unless you do not plan on playing multi-threaded games.

By Built-in Benchmark Queen:
My 2.5 years old delidded 7980xe @ 4600mhz all core with 49ns memorylatency (4000c16 twekaed) is faster than 3950x max overclocked on water in every scenario. Pretty good for a ancient cpu
In gaming it has no chance vs my new 10900k @ 5400mhz and 4600c16 tweaked memory. ~35ns memorylatency.
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post #30 of 55 (permalink) Old 07-23-2020, 10:15 AM
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Quote: Originally Posted by rdr09 View Post
Don't make the same mistake. Get the 8700K. Forget the 6 core without Hypethreading. Unless you do not plan on playing multi-threaded games.
Good luck, unless you're stuck on 6 y.o. games lol.

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