Some thoughts:
1. You should certainly consider 2x4GB or 2x8GB at 3000-3200MHz, over 1x8GB @ 2666Mhz.
Ryzen (especially 1st Gen and APUs) benefit heavily from faster memory.
2. a 120GB SSD fills up fast. If at all possible, I'd aim for a minimum of 240-250GB
3. While the 1070 Strix is a great card.... for very similar money, you could have an MSI Duke 10708*TI*.... 1080 performacne for (in this case) 1070 money.
4. The PSU isn't great.
Realistically, if you could push the budget to just north of $1,300 AUD, you could net 16GB of DDR4, along with the other changes I've suggested.
This would be my preference of the bunch. 6c/12t + 16GB & a 1070TI is a pretty great quality system. Alternates are dropping your memory down to 8GB to meet the budget(ish), and is quite the tradeoff IMO.
PCPartPicker part list /
Price breakdown by merchant
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($206.00 @ Amazon Australia)
Motherboard: Asus - PRIME B350M-K Micro ATX AM4 Motherboard ($79.00 @ Umart)
Memory: Patriot - Viper 4 16GB (2 x 8GB) DDR4-3200 Memory ($207.45 @ Amazon Australia)
Storage: Kingston - A400 240GB 2.5" Solid State Drive ($59.00 @ Centre Com)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.50 @ Shopping Express)
Video Card: MSI - GeForce GTX 1070 Ti 8GB DUKE Video Card ($589.00 @ Umart)
Case: Cooler Master - MasterBox Lite 3 (Windowed) MicroATX Mini Tower Case ($48.00 @ Shopping Express)
Power Supply: Corsair - CX (2017) 650W 80+ Bronze Certified ATX Power Supply ($88.00 @ Shopping Express)
Total: $1330.95
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-09-21 01:44 AEST+1000
If you're sticking to nearer $1,200, then 2x4GB works for ~$1,250 while still getting you the 1070TI + other changes.
PCPartPicker part list /
Price breakdown by merchant
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($206.00 @ Amazon Australia)
Motherboard: Asus - PRIME B350M-K Micro ATX AM4 Motherboard ($79.00 @ Umart)
Memory: Team - Vulcan 8GB (2 x 4GB) DDR4-3000 Memory ($133.00 @ Umart)
Storage: Kingston - A400 240GB 2.5" Solid State Drive ($59.00 @ Centre Com)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.50 @ Shopping Express)
Video Card: MSI - GeForce GTX 1070 Ti 8GB DUKE Video Card ($589.00 @ Umart)
Case: Cooler Master - MasterBox Lite 3 (Windowed) MicroATX Mini Tower Case ($48.00 @ Shopping Express)
Power Supply: Corsair - CX (2017) 650W 80+ Bronze Certified ATX Power Supply ($88.00 @ Shopping Express)
Total: $1256.50
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-09-21 01:44 AEST+1000
OR, right at $1,300 you could do a 2nd Gen Ryzen5 with 8GB.
PCPartPicker part list /
Price breakdown by merchant
CPU: AMD - Ryzen 5 2600 3.4GHz 6-Core Processor ($234.00 @ Shopping Express)
Motherboard: MSI - B450M PRO-M2 Micro ATX AM4 Motherboard ($105.00 @ Centre Com)
Memory: Team - Vulcan 8GB (2 x 4GB) DDR4-3000 Memory ($133.00 @ Umart)
Storage: Kingston - A400 240GB 2.5" Solid State Drive ($59.00 @ Centre Com)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.50 @ Shopping Express)
Video Card: MSI - GeForce GTX 1070 Ti 8GB DUKE Video Card ($589.00 @ Umart)
Case: Cooler Master - MasterBox Lite 3 (Windowed) MicroATX Mini Tower Case ($48.00 @ Shopping Express)
Power Supply: Corsair - CX (2017) 650W 80+ Bronze Certified ATX Power Supply ($88.00 @ Shopping Express)
Total: $1310.50
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-09-21 01:45 AEST+1000
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