potential bottleneck?

[MadSlob]

i have an old venerable i7 2600k running at stock speeds.I intend next year to buy my first Ryzen cpu based rig but wish to buy the RX5700XT early.Im just wondering how much of a bottleneck the cpu and system in general will be  in terms of lost gpu performance if i was to do this.I don't seem to be able to find much on the net at all..a couple of videos showing an oc i72600k coupled with  amds latest and greatest but no 2600ks running at stock speeds.I dont want to overclock this old cpu. Im more than happy with the temps and dont want to mess with things...cheers

[JoostinOnline]

It depends on the game, resolution, and framerate you plan to run. Generally speaking though there will be a pretty significant bottleneck. Running it at stock speeds is a pretty big waste of potential, especially when Sandy Bridge was such a great overclocker.

[Jakub_NF]

Shouldn't be too bad especially considering that you want to upgrade the cpu as well in the short future. The lower the resolution the bigger the bottleneck will be. 

[GoldenLag]

the  2600k is a suprisingly good CPU to this day. so it shouldnt be be anything to worry about. 

[JoostinOnline]

2 minutes ago, Jakub_NF said:

Shouldn't be too bad especially considering that you want to upgrade the cpu as well in the short future. The lower the resolution the bigger the bottleneck will be. 

Sandy Bridge at only 3.8GHz is going to be a significant bottleneck on a modern game. Of course even a mild overclock would mitigate that.

[MadSlob]

will have to think about the overclock..it aint the same ofc but once overclocked a HD7970 which ran really well(with decent temps) for a few years and then died just like that..I was gutted and it hasnt cemented my confidence in overclocking..of course  i could overclock the i7..I guess i will see if and when i buy this new amd card..I game at 1080p only at present on a factory OC RX580 (4gb). In general it runs fine but at times playing games on the cryengine 5 platform i experience some wild swings in fps. The new system when it comes should smooth all of this out..at some point i will upgrade the monitor also but its a 120mhz monitor and i love the colours produced.its also a great looking stylish monitor (Samsung SA950)

[AbdulRehmaan]

You will surely see some bottleneck at stock speeds with an RX 5700XT and i7-2600k in my opinion but it also depends on the games you play. At stock speed, anything higher than a GTX 1060 will bottleneck your rig. I have an i7-4790 (non-k) with a GTX 1070 and i get plenty of bottleneck in CPU intensive games like Battlefield 5, Farcry 5 and Assassin's Creed etc. 

[JoostinOnline]

1 hour ago, MadSlob said:

at some point i will upgrade the monitor also but its a 120mhz monitor and i love the colours produced

So you obviously mean 120hz, as 120mhz isn't a thing. But regardless, a 2600k at stock speeds isn't going to produce 120fps. If you were doing 60hz then it would be okay, but not at 120hz.

 

As for overclocking, just keep it simple and you'll be safe. Here's a guide for the 2600k: https://www.tomshardware.com/reviews/sandy-bridge-overclocking-efficiency,2850-4.html

 

I'd just suggest you go for a 4.2GHz overclock. That's about a 10% frequency boost and should be attainable as long as you aren't using a crap cooler. Make sure the voltage stays under 1.38V, as that's generally accepted as the start of "unsafe voltage" for Sandy Bridge.

[MadSlob]

cheers for all your replies...my motherboard,an MSI Z68 has an auto OC button on it which overclocks everything to 4.2ghz but the frequency for this "small" overclcok is pretty high...maybe i will give it a go:)

[MadSlob]

Gave it a go stock speed went upto the turbo clock speed of 3.8ghz but no higher than this. voltages were below threshhold stability limits but barely.Performance wise it was perhaps a little better at gaming. Maybe my thinking is upside down..maybe it would be better to invest in the cpu mobo and ram first instead of the graphics card and get top performance out of this factory OC RX580...Your thoughts on gaming performance of the Ryzen 5 3600X....single thread performance (passmark)is 2912 marks as opposed to 1942 marks on my old i72600k. Decent enough or should i hold out for an 8 core cpu?

[MadSlob]

ok now i am confused...the assumption was that my i7 2600k @stock would bottleneck my RX580(4gb) but on testing cpu and gpu useage whilst playing, using msi afterburner, i find that my gpu is running at 100% and my cpu usage doesnt exceed 70%.Surely this cannot be right?...the motherboard supports pci-e gen 3 but because a sandy bridge cpu is installed it defaults to pci e gen 2....I lowered the graphics setting ingame as low as i could at one point and wasnt getting any more fps then if i was playing at 1080p which would indicate cpu bottle neck but thats not what msi afterburner is saying.