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SimonC

2600K to 4790K or 5820K

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Hello,

 

If I would consider changing my old 2600K to 4790K or 5820K, which one makes more sense for P3Dv2.5?

 

2600K is running at 4.6Ghz (it will do 4.8Ghz unstable, and 4.7Ghz relatively stable).

Custom water-cooling setup.

GPU: GTX980.

 

I'd expect to overclock the 5820K to 4.5Ghz and 4790K to 4.7Ghz.

 

The primary concern is to maximize the CPU-based performance, usually needed with addons like NGX and 777. The GTX980 does the job nicely in all aspects.

 

Also does anybody know what kind of performance-jump I'd expect at the same clock?

 

Thank you.

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I have 4790k @ 4.6 very stable, 1.26V, with Corsair H110, max temp. 65C. 

4790K it's a beast.

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To my opinion; the performance-jumps were moderate but at the end,the optimum configuration would result into maximum gain on FPS and generally performance.

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I have a well configured system, just my CPU is at it's end. The idea is to get as much as possible from the single core. So a single threaded performance is what really counts to get as much FPS as possible. Quad-core as it is now, does the texture loading quite well.

The question is if 5820K has a better single threaded performance than 4790K, them being basically the same CPU, the 5xxx series being a refresh, as I understand it?

 

I don't think the 5820K will go much over 4.5, but if compared 1:1, who would win, and by how much? I tried comparing on the net, but didn't come really far.

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OK, this test speaks for itself, thanks. Though, do consider that the base clock of 5820K is lower than 4790K. That might be the reason for such result.

 

But when comparing 2600K to 4790K, the problem is that you don't know it's clock for clock speed. It says 25% more, which is admirable, but 2600K is 3.4Ghz and 4790K is 4.0Ghz. If both were clocked to 4.5Ghz or 4.0Ghz, how does 4790K pan out?

 

In the end, the question is, if in some situations I have 20fps with the NGX out of an addon airport, can I expect 25fps with the 4790K? Can I expect more? The smoothness of the sim is even now given, that is least of my problems. I simply "see" slower framerate when it starts approaching 20fps. 30fps would be great, but I'm afraid it is not achievable.

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That's really a tough call. My best instincts tell me that it's probably not worth the upgrade. I do know that the 4790K turbo will run to 4.4Ghz on the first core, 4.3Ghz on the second core and 4.2Ghz on the other two cores. I've had mine OC's at 4.7Ghz and honestly can't tell any difference with FSX/P3D vs. just letting it run turbo mode. Could you see 25 fps where you see 20 now? Probably not. And 30 fps is certainly out-of-reach.

 

On the other hand (there is always one of those), there are more than just a few water-cooled 4790K's running at 5.0-5.1Ghz. That might be a whole other story if you could get it that high.

 

My bottom line - given the cost of the motherboard swap, processor, et. al. I'd wait one more generation of CPU.

Doug

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That is also an option, yes. The question is what will really Skylake bring, if it will have higher single core performance. It is understandable that Intel concentrates on other aspects of the CPU, like multi-threading, more cores and other "features", which are not used by FSX/P3D programming.

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I have a 2500k running at 4.4 ghz. Is it work upgrading the cpu and motherboard or am I going to only get marginal improvement?

 

If will wait for next generation if that is the case, or Lockheed marten to improve the legacy FSX code.

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I assembled I7 4790K on Mobo ASUS Z97-P this sunday (total 445€ on amazon).

 

OCed to 4.7GHZ at 1,25V aircooled.. stable!

 

The mobo seems wonderful for its value (less than 100€!)

 

The CPU rocks!!!

 

With the proper tweaks and not bottlenecked by a slow GPU (i use ATI R9 270X with good results, so yours is more than enough) you can get 30FPS with high settings (not maxed of course)  pretty everywhere also in most parts of ORBX sceneries (ex. metropolies where i get 20-25 fps).

 

Si i vote for I7 4790K i think is the top, price wise.

 

EDIT: BUT you have already a decent CPU, looking now at benchmarks... there is a diffence but i don't know if i would spend 500$ for that... Also i don't think anyone is able to get 30FPS stable at busy / payware airports...

 

maybe the best advice is to wait nex gen.but if you have money to spare why not I/ 4790K is great.

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Is the 2011-v3 structure on these newer X99 boards the way of the future?  I'm considering the same thing for this summer, and the cost difference between the older DDR3 and the newer DDR4 memory isn't that much, nor is the price difference between the 5820 and the 4790.  I guess part of my thought is if they move Prepar3d to 64Bit structure sometime this year, which way will be better to move towards?  A newer chipset and a CPU with more cores, or a proven powerhouse on a more mature chipset?

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I have 4790k @ 4.6 very stable, 1.26V, with Corsair H110, max temp. 65C. 

4790K it's a beast.

 

Max. temp 65C with p3d v2.5 is cold...

 

I have 4790k @ 4.4 and when I use p3d v2.5 my core temp reach almost 99C with H100i.

 

when I use X Plane 10 my temp max. is 70C.

 

I think that I will change my water cooler for H100i to H110.

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I have 4790k @ 4.4 and when I use p3d v2.5 my core temp reach almost 99C with H100i.

 

You should be no where near those temps, I'm not hitting that at 4.8.

 

Before you buy a new cooler I would change the thermal paste. just a very small grain of rice vertically will do.

Don't forget to clean both the cpu and cooler first with alcohol.

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I assembled I7 4790K on Mobo ASUS Z97-P this sunday (total 445€ on amazon).

 

OCed to 4.7GHZ at 1,25V aircooled.. stable!

 

The mobo seems wonderful for its value (less than 100€!)

 

The CPU rocks!!!

 

With the proper tweaks and not bottlenecked by a slow GPU (i use ATI R9 270X with good results, so yours is more than enough) you can get 30FPS with high settings (not maxed of course)  pretty everywhere also in most parts of ORBX sceneries (ex. metropolies where i get 20-25 fps).

 

Si i vote for I7 4790K i think is the top, price wise.

 

EDIT: BUT you have already a decent CPU, looking now at benchmarks... there is a diffence but i don't know if i would spend 500$ for that... Also i don't think anyone is able to get 30FPS stable at busy / payware airports...

 

maybe the best advice is to wait nex gen.but if you have money to spare why not I/ 4790K is great.

 

I think I am going to wait. I don't use a virtual cockpit (using an avionics suite), and I am already getting between 20-30 FPS at Orbx airports. 

 

To tell you the truth, I believe our computers are more than efficient for a flight simulator; LM just needs to do some hacking around with that legacy code. 

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I have a 4790k sitting on my desk  :mad: 2 rma's on my MSI mobo both dead on arrival. Decided to go back to goood ole gigabyte, just got to wait it out.

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For me at the price of the 5980 - no brainer I would go for the 4790K and wait for probably two years for newer technology - to invest 1000 dollars just for the cpu not counting all the other hardware you will need to buy - the performance difference doesnt warrant that much investment at this point in time

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My 5820k went to 4.7 with ease. I only changed 2 values in BIOS. I could push it more if I wanted but the frame rates have never left 30 regardless of what I'm running. I use ORBX, REX textures with ASN, NGX and a whole lot more. However I went with the 5820k mainly because I run X-plane as well and DCS so I wanted to find a balance for all my sims.

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I am not convinced that a 4790k CPU (or any other new CPU for that matter) will provide dramatically enhanced performance in FSX/P3D over a 2600K @ 4.5Ghz, considering that you already have a decent GPU. IMO, the last few iterations of CPU have been more akin to "mild evolution", rather than "significant revolution".

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My 5820k went to 4.7 with ease. I only changed 2 values in BIOS. I could push it more if I wanted but the frame rates have never left 30 regardless of what I'm running. I use ORBX, REX textures with ASN, NGX and a whole lot more. However I went with the 5820k mainly because I run X-plane as well and DCS so I wanted to find a balance for all my sims.

 

How is your ground texture loading with your 5820k? Im considering that CPU too..

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How is your ground texture loading with your 5820k? Im considering that CPU too..

 

For the most part, I haven't noticed any texture loading on the fly. There is the odd time when I'm flying around a major addon airport and I can see some textures popping up a bit late. One thing that has improved enormously is when you go from external views back to the VC and you can see VC textures being reloaded. This is almost instant now. I'm not sure if the memory helps this but I also run DDR4 at 2666. That might help since limited memory space is probably the biggest bottleneck for texture loading.

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My 5820k went to 4.7 with ease. I only changed 2 values in BIOS. I could push it more if I wanted but the frame rates have never left 30 regardless of what I'm running. I use ORBX, REX textures with ASN, NGX and a whole lot more. However I went with the 5820k mainly because I run X-plane as well and DCS so I wanted to find a balance for all my sims.

I assume that the two values changed were the multiplier (47) and core voltage? (1.2?)   In the other thread with Rob A.'s new machine, we see that he has changed his BCLK to 125 from 100 and is running his 5860 at 4.5Ghz

 

Thanks

Dave

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My 5820k went to 4.7 with ease. I only changed 2 values in BIOS. I could push it more if I wanted but the frame rates have never left 30 regardless of what I'm running. I use ORBX, REX textures with ASN, NGX and a whole lot more. However I went with the 5820k mainly because I run X-plane as well and DCS so I wanted to find a balance for all my sims.

I assume you're water-cooling? It isn't mentioned in your profile.

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Have a lot of systems Intel and Amd , my sim pc is a 4670k @5.1ghz custom water and 980Strix.

Have tested my Haswell-E CPUs on fsx , custom water @4.9ghz (5820k,5930k and 5960x)

The texture load was faster ( placebo ?) fps not as high as the 4670k.

Run the ram at 3200mhz cl13.

 

The Old SB is not close to the Haswell, had a fast 2700k @5.4ghz that one is not close to the 4670k.

 

Skylake? NDA

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Thank you, westman for those comparisons..I have a stable 2600k @ 4.9 so i definitely needed a purpose for buying the 4670k 

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The idea is to get as much as possible from the single core. So a single threaded performance is what really counts to get as much FPS as possible.The question is if 5820K has a better single threaded performance than 4790K, them being basically the same CPU, the 5xxx series being a refresh, as I understand it?

On that basis I'd stick with your 2600k! At the same clock speed, I don't think a 4790K will be noticeably quicker than the 2600K for a single threaded application. The 2600k can be overclocked higher than later processors because the larger die size dissipates heat more effectively (Sandybridge were 32 nm processors, Ivybridge onwards are 22 nm and have more stuff within the chip too).

 

I wouldn't even consider the 5820K, it's a lot more than the 4790K and you're not likely not notice the difference!

 

Save your money for Skylake or even Icelake.

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