Tech and Talk > Gaming > PC gaming Tech > Very Specific Math-Based PCIe 3.0 Question

Very Specific Math-Based PCIe 3.0 Question

In other words, if the given increase (3.0 over 2.0) is 8.23% at 1920x1080, but is 50.01% at 5760x1080, how much will it be at 2560x1440?

Stupid math problems.
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Chris, very quick comparison just in my head shows something in line of 15-20%

Is that linear or logarithmic?

linear, based on average of 45-60 good playable FPS, those numbers won't matter all that much, I mean 45 or 48 FPS, does it matter?

26% is ideal scenario. Are you looking into getting a new mobo or GPU? Honestly think either way isnt worth your cash.

I'm upgrading my PC this year. Trying to decide between an LGA 1155/1150 build (PCIe 3.0 x8/x8) or an LGA 2011 build (PCIe 3.0 x16/x16), and adding a second 7970.

26% is a fairly sizeable upgrade. I think I'll go with LGA 2011. The i7-3820 is $230 from Microcenter, which is exactly the same price of an i7-3770K, and only $40 more than an i5-3570K.

I know the motherboard will be more expensive, but I think whatever I pay extra is worth the performance gain.
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Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.

is your 7970 underperforming now on the 27" you have?

Yes. I get 30-45 FPS average, sometimes dipping under 30 FPS. Keep in mind I tend to play the latest games (Crysis 2, Skyrim w/mods, The Witcher 2, etc.).

1440p is a bitch, even if it is beautiful. If I had to do it again, I'd get a 24" 1080p monitor, working up to three of them. I don't see the added strain on the GPU as worth the extra pixels at 1440p.

There is the chance my i7-920 is starting to be the bottleneck, so I'll probably upgrade the CPU/mobo and see where I stand before buying a second 7970.
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Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.

Really, interesting. Quick summary of 1440p. I see what you are doing now. Then yes, I will agree with 2011, and most importantly: adding second GPU, that will / should move you into 60-70 FPS territory.
But I would add second 7970 to existing setup and see what happens, I think you will see something close to what you will see with 2011.

Yeah, that's why I caveated my question the way I did, because if not, I'd get some uninformed self-considered "enthusiast" say "durr get a 3770K it's all the CPU you need" (it has already happened on Reddit).

Thanks for the confirmation of what I was thinking, I believe I'll pick up an i7-3820 and an LGA 2011 mobo.

I've never really looked at the x79 mobos, always assumed I'd go the mainstream route with my next build.

Does anyone have any favorites?
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Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.

reply to Krisnatharok
Hmm I have been thinking about getting a new GPU and 1440p monitor this year, but if this type of performance scaling is common in games then it seems I'l be limited by the pcie 2.0 in my lga 1156 system even if the CPU holds up.

At that point I might as well sell my whole system (i7 860, 8gb, 6970) and build from scratch when Haswell and the next-gen GPUs are out. That or hold on to the whole thing until next year...pretty sick of my ancient 24" cheap TN panel though.

Go for a quality 24" or 27" 1080p monitor, and work your way up to three of them. 1080p is much kinder on a GPU than 1440p (which has almost twice as many pixels).
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Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.

reply to Krisnatharok
Linear approximation looks OK. My guess would be that the real curve is sub-linear, as in it ramps up faster as it becomes more of a bottleneck. That makes 26% a worst case IMO it's probably not quite that bad.

reply to Krisnatharok
Well i don't see how working up to 3 1080p (i prefer 1920x1200 but close enough) is any easier on the GPU than the 1440p? Also there's really no in-between steps to work through, 2 monitors for gaming doesn't really work you'd pretty much just jump from 1 to 3 at some point.

Not a fan of multi-monitor for gaming anyways, I would just want the most i can get from a single monitor. How much time do people really spend looking at the side monitors in those triple setups?

It's not, was just saying that I'd rather go full blown 3x 1080p than be stuck at a single 1440p. If you don't plan on upgrading monitors again, a single 1440p does fine, but do realize it has twice the pixels of a 1080p monitor and plan your GPU solution accordingly.
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Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.

The other day I was at Fry’s reading webpages on 1440p. Realizing that my eyes aren’t getting any better (and this is with regular reading glasses I am using on my 24”) I saw that I will struggle with text if I get the 27”. Also now I see that gaming will require an upgrade. I am still running 5870 and it still keeps up with 1920X1200 24” I have. However, I think I would enjoy new 1080p 27”, and this is what I have decided to look up in the future, not sure if I need/want 3D, there is still much room to research before I purchase, they are relatively inexpensive. Thanks for the feedback Chris.

That sucks man, what company made your 680?