Need to buy new MOBO and CPU, can RAM upgrade wait?

Tomas1020 · Oct 22, 2018

Hello,

I have this big upgrade planned. Currently, I have this setup:

Case: Corsair Obsidian 750D
GPU: Gigabyte GTX 1080 Ti
RAM: 2x4 GB, 1600 MHz, DDR3
CPU cooling: Corsair H115i
Seasonic Prime 80+ Gold 750W

Unfortunately, my MOBO (AsRock Z97) died cause of a water damage, so my i7-4790K has no place to sit in (could be dead too as far as I know). Therefore, I figured that it's a good time for a major upgrade.

I want to buy these items:

i7-8700K
MOBO - I have several favourites - Gigabyte Z370 Aorus Gaming 7 (possibly 5) or ASUS ROG MAXIMUS X HERO
2x8 GB, DDR4, 3200 MHz RAM (for overclocking purposes)

My budget allows me to buy only CPU and MOBO at the moment, not the RAM. I know that my current RAM is very weak, so I'd like to ask if it will hold the rig for a few months. Also, will my PSU be sufficient for the rig?

Thanks in advance.

All generic tips on my situation would be appreciated too

captaincharisma · Oct 22, 2018

if your old CPU is a 4790K then it uses DDR3 ram which is not compatible with modern CPU's. you would have no choice then to get DDR4 ram if you want a working system right away

trampus123 · Oct 22, 2018

your ddr3 ram will not work on a z370 mobo it needs ddr4

Tomas1020 · Oct 22, 2018

captaincharisma :

Wait, so if I assemble the i7-8700K, Z370 MOBO and my old DDR3 RAM, the PC wouldn't run at all?

bignastyid · Oct 22, 2018

Your current DDR3 ram will not work in the new system at all(won't even fit the slot). 8th gen cpus like that 8700k can only use DDR4.

As for the PSU it is more than enough.

Tomas1020 · Oct 22, 2018

trampus123 :

Ah... Okay, thanks... That's a bummer :/

captaincharisma · Oct 22, 2018

Tomas1020 :

no, DDR3 doesn't meet the power requirements of the CPU. if you manage to get your DDR3 installed in the Z370 mobo you may risk damaging your CPU

trampus123 · Oct 22, 2018

you may want to look at ryzen 7 2700x and a x470 mobo to same some cash so you can get ddr4 ram.
the ryzen 7 2700x is the same at gaming as the i7 8700k

captaincharisma · Oct 22, 2018

trampus123 :

or save some cash by only going for 8GB of ram now and then later on upgrade to a 16GB kit

trampus123 · Oct 22, 2018

captaincharisma :

that will work as well

Tomas1020 · Oct 22, 2018

trampus123 :

I want to stick to Intel because I mostly do flight simulations and the platform benefits mostly from the single core performance - which Intel units do much better as far as I know

Am I correct?

USAFRet · Oct 22, 2018

Tomas1020 :

The DDR3 won't even physically plug in. The positioning slot is in a different place, for exactly this reason.

captaincharisma · Oct 22, 2018

Tomas1020 :

with 1st gen ryzen that was the case but with ryzen 2 the per core performance is pretty close to intel CPU's now

bmockeg · Oct 22, 2018

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i7-8700K 3.7GHz 6-Core Processor ($379.99 @ Amazon)
Motherboard: ASRock - Z370 Extreme4 ATX LGA1151 Motherboard ($158.98 @ Newegg)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 Memory ($124.99 @ Newegg)
Total: $663.96
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-10-22 19:46 EDT-0400

This Motherboard is more than capable of,overclocking and meeting all your expectations. Those motherboards you mentioned are expensive.

Tomas1020 · Oct 22, 2018

Ok, so I guess that I will have to "go beyond my budget" and buy it all

Thanks everyone for your advice

trampus123 · Oct 22, 2018

captaincharisma :

AMD is back! I have run AMD and intel newest and can not see no dif in gaming all looks the same and feels the same.
now in video and photo edit and render AMD it killing intel

Tomas1020 · Oct 22, 2018

bmockeg :

I'll definitely look into that, thanks! Unfortunately, all parts are more expensive where I live

bmockeg · Oct 22, 2018

Well that motherboard should be around 75-100 cheaper than the ones you mentiined and is a very good board.

Tomas1020 · Oct 23, 2018

bmockeg :

Thanks for the tip. It indeed is cheaper. My question is, what do those expensive ones have that this one doesn't?

bmockeg · Oct 23, 2018

Basically a third m.2, second network card and a couple more USB ports.

bignastyid · Oct 23, 2018

More features and better VRMs are the usual differences between the cheap and more expensive z370 boards.

Need to buy new MOBO and CPU, can RAM upgrade wait?

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