[SOLVED] Upgrade rx 580 to vega 64 on i7 3770 or nah

[Shodoman]

CPU: i7 3770 @4.3
Motherboard: z77 extreme 4
Ram: 4x4GB Kingston something blue @1600 with improved timings
SSD/HDD: 2 x Samsung Evo SSD; 2 x WD 7200rpm HDD
GPU: RX 580 want to upgrade to Vega 64
PSU: Super Flower SF-550P14XE
Chassis: just bought a CM Mastercase H500
OS: Windows & Linux
Recently been playing WoW Classic and Warframe but want to get into some Assasins's Creed, Witcher 3, recent FarCry's.

Got an offer from a friend to buy his Vega 64 for 210 Euro. Got really excited only to figure out that it was too large for my case. Bought a CM H500 and then found out this card draws 290 W of power .

At this point I've overstretched my budged once by buying the case. What should i do next?

a) forget about upgrading - the CPU and GPU match pretty well so raise some money for an entire new build in 1-2 years.
b) wait for Black Friday, maybe 5700XT prices come down enough (~480 Euro at the moment.)
c) stretch budget again - buy a 750 W PSU (is this enough?) and then buy the Vega card
d) other (please advise)

 

[Aeacus]

Short answer: Option A.

Long answer:
Option A will give you the most performance for your money. And since you're running old system, new PC is inevitable.

Option B does give better performance over Vega 64,
comparison: https://gpu.userbenchmark.com/Compare/AMD-RX-Vega-64-vs-AMD-RX-5700-XT/3933vs4045
But since RX 5700XT is 225W GPU, you'd also look towards new PSU. Minimum 650W unit (Seasonic or Super Flower Leadex), while 750W unit gives more headroom.

Option C is same as option B but with on average 23% less performance, while PSU upgrade is still needed.

Option D would be going with GTX 1070 Ti, which is same performance as Vega 64,
comparison: https://gpu.userbenchmark.com/Compare/AMD-RX-Vega-64-vs-Nvidia-GTX-1070-Ti/3933vs3943
But since GTX 1070 Ti is 180W GPU, you can use it with your 550W PSU. Downside of option D is high price of GTX 1070 Ti at the market,
pcpp (cheapest GPUs on each series): https://de.pcpartpicker.com/products/compare/Z6BTwP,h766Mp,VwPgXL/

 

[Shodoman]

@Aeacus Thank you for your answer.

As an update:

• bought a power measuring outlet and put my system to the test
• total power draw was 330 W peak with the RX 580 - that leaves me with 200 W headroom, 150 W if i want to peak at 89 % of the rated 12 v rail capacity
• i went and got the Vega 64 Strix - the price to performance unbeatable for an upgrade, at this point
• playing games have peaked at 420 W system power draw

It is possible that because the CPU is bottlenecking the card in some games this will help total system power to stay well under rate 540W of the PSU.

I consider this to be the best answer for my need as it gives me: - improved performance today; - step by step upgrade path (opposed to all at once); - best price to performance;