Hello, I've been using tomshardware for a few years to help with research on parts and the time has come that I haven't found an actual thread/question on this specific upgrade. I'm currently running:
CPU: i5 750 @ 2.67GHz (Locked due to board; MSi Indio-7613)
GPU: Radeon HD 5770
PSU: 650w (Can't remember the brand, but it has appropriate 6pin and 4+4pin connectors for PCIe)
RAM: 3x2GB DDR3
I'm going to be purchasing parts for a completely new rig, and one of them is a GTX 780. Since I am going to be purchasing them one at a time, I was thinking of using the GTX 780 in my current rig until I have them all. I mostly use my current PC for ArmA 3 and run at around high detail AAx2 AFx16 at 1440x900 (temporary low res monitor) and it sits around 45-50fps maximum. I want to know if either part, my CPU or GPU, is fine as is and that the other should be upgraded. I've seen several topics on both parts being used together, but not an i5 750 at stock speed.
In short, is the i5 750 or the 5770 more in need of upgrading? I know it's a CPU intensive game, but where do both of these parts stand and will it be a significant increase in performance to use the GTX 780 over my 5770? I know I'll be doing perfectly at 1920x1080 with my new build once it's done, but in the meantime I'd like a good jump in framerate so I don't get too anxious waiting for the other parts arrive.
One point you probably already know: The 5770 HATES AA, I mean really hates it!
Can you give us the specs for the new build and your projected total budget?
I'd go for the GPU upgrade first, then the monitor then the rest.
As an off topic point, check my specs, I've nothing installed that rig can't run at at the very least high settings smoothly, you might want to consider a search for a suitable motherboard and cooler to unlock that i5 and aiming a little lower with the GPU rather than splashing out on a new build.
Yeah my 5770 has had the biggest drops going from no AA to just x2, but still playable. And on this resolution I see almost no difference between x2 and x4 or x8 anyways.
The entire build sits just below $1800, and is set so that I may go with dual-SLI in the future with 780's. The parts are:
-CPU: i7-4770k $310
-MOBO: GIGABYTE GA-Z87X-OC $200 (Any suggestions on a better board considering I would only need the two PCIe x16 slots? I don't mind if only one's in x16 and the other x8)
-GPU: EVGA GTX 780 $500 (May as well get a 780Ti and still be under $2k, but still need to think on it)
-RAM: 2x4GB Corsair Vengeance $87 (Suggestions on RAM would help too. IIRC timing and speed doesn't matter much with gaming, only size)
-Case: NZXT Phantom 410 $100 (I could go with an Antec 300 for around $50, but this case goes more for looks to pair with the MOBO)
-PSU: Corsair TX750M $110 (Should be just enough for SLI, but I'd probably go higher on wattage just in case)
-Boot Drive: Samsung 840 250GB SSD $190 (For OS and games I regularly play)
-HDD: Western Digital 1TB 7200RPM 64MB Cache $60
-OS: Windows 7 Home Premium $85 (I could go with either 7 or 8.1, I'd have to read up more on the performance and support for both)
CPU cooler and Blu-Ray Drive make up another $100, so $1742 right now, not including shipping for all parts. Throw in a decent monitor and it'd only go over $2k if I went with a $780 Ti, which I don't think I'd mind much.
I wish I could get an older P55 motherboard to unlock the CPU, but the PC is used by other family members and once the build I have in mind is complete, I'll be putting the old 5770 back in, since the only games played by the others are on Source engine and the 5770 and locked i5 wouldn't have problems there. I've no problem with the money on this build, and I'm only really getting it so I can have my own PC. I should've added those extra details, but there they are.
No harm in trying to save a few quid but it seems like you have a Plan.
I'd still go with: GPU first, you'll see an improvement-probably a big one at the current res-followed by the monitor (it'll get that 780 starting to earn its keep), then the main build.
My i5 750 handles a r9 270 just fine, However a 780 is much more powerful , But it should be fine, All i5's bottleneck a little, I almost started believing in the myth that I needed to upgrade my i5 750, but it is nonsense, A new ivy or haswell i5 is not going to perform any better in games than the 1st gen lynnfield i5 750 or i5 760, Or the 2nd gen Sandy bridge i5's , It is just a waste of money and a good CPU. I would love to see some current gaming benchmarks of the old i5 750 vs the newer i5 3570K And the Haswell, And I bet money the difference is very small.
Only way to check is to run your own benchmarks using ingame tests- Metro LL, Metro 2033 and TR all have ingame test routines-and then compare your results to those from a review of your card, most sites are using overclocked top of the range hardware so any change is going to be down to the CPU/platform.
And no, I don't have any intention of changing my i5 750 either, too much cash, marginal gain.