Help with bottlenecking

[BadDragonREP]

Wasn't sure what to tag this but if someone who can add tags could do that it'd be super helpful...

Anyway, my question is this; will a Xeon E5520 bottleneck a GTX 1080. Not an overclocked CPU and no overclock on the GPU.

The system would have 16gb of ram, and a decent size and speed SSD for boot and some games.

I'm going this route as I already have an E5520 powered computer and am hoping that with a power supply upgrade it would handle the 1080 just fine.

Let's assume that it will bottleneck it some, so I throw in a Xeon E5645, will that bottleneck it?

The computer will be used mainly as a VR setup, with of course some other gaming thrown in as well, and likely running a simple 1080p screen.

Any help would be appreciated, even something as simple as "yes it will bottleneck just get xxxx."

[Majestic]

If for VR, probably yes. A 2.26ghz Nehalem is not going to be sufficient for consistent 90fps. Even the G4560 will smoke it.

[BadDragonREP]

Keep in mind the E5520 is 4 cores and 8 threads, and the E5645 is 6 cores and 12 threads. I know it's old, but it was so cheap I'm just hoping it's good enough.

[Majestic]

8 minutes ago, BadDragonREP said:

Keep in mind the E5520 is 4 cores and 8 threads, and the E5645 is 6 cores and 12 threads. I know it's old, but it was so cheap I'm just hoping it's good enough.

Yes, but IPC is much more important still. And current CPU's, which have higher clockspeeds aswell as IPC, will be about a factor 3x better in this regard.

It's just not feasible. The money will be wasted. 

 

Also, Watch Dogs 2 and Crysis 3 are the only games that marginally scale past 6 threads. You have no luck getting any benefit of HT on that E5645. So it would still end up being something similar to a FX-6100 in practice. The CPU's, if you can get it to run a bit faster (overclock), would still be 'ok' to do some casual games on. But it's not suited for hitting a consistent 90 fps.

 

Minimum for VR is a 4570 I believe. And that is not a guarantee for rock solid VR experiences.

[BadDragonREP]

Dang, alright thanks man.

 

I was reading your gpu with different cpu comparison thread thing, I always like seeing more proof that everyone telling me their 970 was better than my r9 390 were wrong, even if it doesn't matter at all anymore.

 

...now If I could just figure out how to close this thread...

[Bananasplit_00]

there will be quite the bottleneck unless you can get those past 4GHz, if you get them up to about  that it should be "OK", it will bottleneck but it will still probably get you the 90fps. keep in mind that you will have to push a baseclock of almost 200 to get that to work if the multiplier is locked(im 99% sure it is) which might cause other instabileties