2500k vs 3770k for 7680x1440

[ehpexs]

Ever since the summer I've been trying to prepare my system for a 2560x1440 'eyefinity' (7680x1440) upgrade. Firstly I bought a single 7950 as a stop gap for when I first get the cards. When the next gen Nvidia/AMD cards come out I hope they can run that res on a pair of cards. Next I went for a case/ PSU upgrade. A Fractal Arc Midi meant for water cooling and a Corsair HC 750 for dual GPU upgrades. My latest upgrades have been a EVGA Z77 FTW and 16GB of Samsung 30nm ram. The last thing I look at before I buy 3 Monoprice monitors is the CPU. The biggest problem with my 2500k isn't speed but the lack of PCI 3. From what I've seen in Vega's threads at that sort of resolution it seems PC 3 really does make quite a difference. My question is, do I keep my CPU or do I upgrade to a 3770k?

The benchmark is question is this one from Vega.

 

[Ed1]

Ever since the summer I've been trying to prepare my system for a 2560x1440 'eyefinity' (7680x1440) upgrade. Firstly I bought a single 7950 as a stop gap for when I first get the cards. When the next gen Nvidia/AMD cards come out I hope they can run that res on a pair of cards. Next I went for a case/ PSU upgrade. A Fractal Arc Midi meant for water cooling and a Corsair HC 750 for dual GPU upgrades. My latest upgrades have been a EVGA Z77 FTW and 16GB of Samsung 30nm ram. The last thing I look at before I buy 3 Monoprice monitors is the CPU. The biggest problem with my 2500k isn't speed but the lack of PCI 3. From what I've seen in Vega's threads at that sort of resolution it seems PC 3 really does make quite a difference. My question is, do I keep my CPU or do I upgrade to a 3770k?

The benchmark is question is this one from Vega.

those big gains are because of 4x SLI config , two card SLI I doubt would see much improvement (maybe 10% ,my guess) . if it is just primary games I don't think it be big increase going from 2500k to 3770 , though you due gain HT and small bump in mhz (200mhz+) at stock speeds .

Do you plain or are running OC'ed ?

I would say your cpu now is more than enough to handle any vid driver overhead and most important parts would be your pic of vid cards in your setup .

 

[TakeNoPrisoners]

I wouldn't worry about it with only two GPUs. There just isn't nearly as much bandwidth required in two GPU SLI compared to four.

 

[FalseChristian]

With the power of today's GPUs PCIe 2.0x16 is just fine. Having more than 2 GPUs in SLI is a waste of money considering most games are console ports. Even with Crysis and my 'old' GTX 460 1GBs I don't need SLI on to play it efficiently.

 

[ehpexs]

those big gains are because of 4x SLI config , two card SLI I doubt would see much improvement (maybe 10% ,my guess) . if it is just primary games I don't think it be big increase going from 2500k to 3770 , though you due gain HT and small bump in mhz (200mhz+) at stock speeds .

Do you plain or are running OC'ed ?

I would say your cpu now is more than enough to handle any vid driver overhead and most important parts would be your pic of vid cards in your setup .

I should clarify my system right now is a 4.7 GHz 2500k @ 1.3 volts running on a Noctua NH-H14, a oced 7950, a P8P67, 16GB of 1.65 volt 1333 ram, a 160GB intel SSD and a 2TB scratch drive. I'm more doing this because I got a deal on a case, psu, mobo ($120 EVGA Z77 FTW) and ram. So my buddy wants to buy this rig off me.