3-year warranty
Parts and labour covered for three years, with free return shipping on approved claims. Extend to 4 or 5 years above.
Pictured: display build
1 / 8Prism Colossus Black
Intel Ultra 7 270K Plus | RTX 5090 32GB
$8,737.00
Was $9,716.00
Save $979.00
- 3-year warranty
- Lifetime support
- Free shipping & Transit cover
Dispatches 5-8 Business Days
Make it a set
Black Friday bundle
MSI PRO MP251 24.5" 144Hz Monitor + GAMDIAS HERMES E6 Elite Keyboard & Mouse Bundle- MSI PRO MP251 E14L 24.5" FHD 144Hz IPS monitor
- GAMDIAS HERMES E6 Elite full-size hot-swap mechanical keyboard and mouse combo
$105.00 Save $13.00
10% off
Keyboard
NuPhy Node75 High-Profile Wireless Mechanical Keyboard75% wireless, NuPhy Max switches
$98.004 keyboards to choose from
10% off
Mouse
Keychron G4 8K Wireless Gaming MouseLightweight wireless, PixArt 3950, 8,000 Hz
$91.004 mice to choose from
10% off
Bundle
Gamdias HERMES E6 Elite 2-in-1 Mechanical Keyboard and Mouse ComboKeyboard, mouse, headset, headset stand and mousepad
$35.00Description
The Prism Colossus Black puts an RTX 5090 in our Prism on Intel. It pairs the Palit GeForce RTX 5090 GameRock 32GB with an Intel Core Ultra 7 270K Plus on a Gigabyte B860M EAGLE WIFI6 motherboard, with 32GB of DDR5, a 1TB Gen4 NVMe SSD and a 1000W 80+ Gold power supply, in the Radium S342 Black case. Built for 4K gaming at high settings.
The photos show the Prism Titan Black build, which has a liquid cooler and 9 fans. The Colossus ships with the Radium Air Black cooler, 6 ARGB fans and the Palit RTX 5090 listed in the specs.
Specifications
| Case | Radium S342 BlackYour choice |
|---|---|
| Motherboard | Gigabyte B860M EAGLE WIFI6Your choice |
| CPU | Intel Ultra 7 270K PlusYour choice |
| RAM | 32GB (2x16) DDR5 6000mhzYour choice |
| Graphics Card | RTX 5090 32GBYour choice |
| Cooler | Radium Air BlackYour choice |
| Storage | 1TB NVMe Gen4 M.2Your choice |
| Fans | 6x ARGB PRISM 120mmYour choice |
| Power Supply | 1000W FSP | 80+ GoldYour choice |
| Operating System | Windows 11 ProYour choice |
| Connectivity | Wi-Fi & BluetoothYour choice |
| Warranty | 3 YearsYour choice |
Dimensions
365 mm H × 285 mm W × 420 mm D. Case: Radium S342 Black.
Delivery & returns
- Standard Shipping (Free): 1–7 business days
- Express Shipping ($65): 1–4 business days
Systems are built and tested to order. Most ship within 1–10 days, but during busy periods this can extend to 2–3 weeks.
We fully cover any damage in transit, including replacements and return shipping if needed.
Returns: 30-day return policy (change of mind); products must be in original, re-sellable condition. Email info@radiumpcs.com.au for approval first.
Warranty
- 3-Year hardware warranty from purchase
- Covers all hardware defects and failures (excludes accidental damage)
- Lifetime support – no labor charges during warranty
- Free return shipping for approved claims
Longer cover (4 or 5 years) is an option above.
Reviews
Specifications
Updates with the upgrades you choose above.
| Case | Radium S342 BlackYour choice |
|---|---|
| Motherboard | Gigabyte B860M EAGLE WIFI6Your choice |
| CPU | Intel Ultra 7 270K PlusYour choice |
| RAM | 32GB (2x16) DDR5 6000mhzYour choice |
| Graphics Card | RTX 5090 32GBYour choice |
| Cooler | Radium Air BlackYour choice |
| Storage | 1TB NVMe Gen4 M.2Your choice |
| Fans | 6x ARGB PRISM 120mmYour choice |
| Power Supply | 1000W FSP | 80+ GoldYour choice |
| Operating System | Windows 11 ProYour choice |
| Connectivity | Wi-Fi & BluetoothYour choice |
| Warranty | 3 YearsYour choice |
Case dimensions
- Height
- 365 mm
- Width
- 285 mm
- Depth
- 420 mm
Radium S342 Black. Photos on this page show a display build; your PC ships with the parts in the table.
Frame rates
Performance tier4K Ready
Battlefield 6
155FPS
Fortnite
150FPS
Marvel Rivals
225FPS
Counter-Strike 2
415FPS
Results based on High settings. Performance may vary depending on game version, map, or resolution.
Theme packs
In the Radium pack10 pieces
- 88 Ra fan badge ×2
- Radium/PCs banner ×1
- Ra fan hub cap ×2
- Cooler nameplate ×1
- GPU charm ×1
- Element tile ×2
- Top fan ring ×1
In the Halloween pack9 pieces
- Spider-web fan insert ×2
- Bat fan grill ×1
- Pumpkin & ghost bunting ×1
- Corner web ×1
- Graveyard shroud strip ×1
- Haunted branch & bats ×1
- Jack-o'-lantern charm ×1
- Skull pile ×1
Make it yours
3D-printed in-house and pre-fitted to your PC.
Fits standard 120mm fans/radiators (uses existing screws).
Custom designs: Email sales@radiumpcs.com.au.
Shown on a display PC. Pieces are fitted to suit your case.
Halloween theme pack. Numbers match the list.
Prism Colossus BlackIntel Ultra 7 270K Plus | RTX 5090 32GB
Melbourne, since 2019 · 7000+ customers
Backed for three years. Covered all the way to you.
Shipping damage? Covered
Every order is covered in transit. If anything arrives damaged, we replace it and pay the return shipping.
Built and tested in Melbourne
One technician builds your PC, then our testing crew stress-tests it before it’s approved to ship.
Lifetime support
Real technicians on 1300 935 884, Monday to Friday, 9:30 am to 5:30 pm. No labour charges during warranty.
Reviews
Prism Colossus Black FAQs
Still unsure? Call 1300 935 884 (Mon–Fri, 9:30 am to 5:30 pm) or email sales@radiumpcs.com.au.
Do I have to install anything?
Only your games! Your gaming PC will arrive with windows installed and activated, drivers downloaded and everything you need to get started.
Can I upgrade it later?
Yes – you can upgrade RAM, storage, or GPU down the line. Just make sure any upgrades are done by Radium PCs tech to keep your warranty.
Does it include Wi-Fi and Bluetooth?
Yes – both are built-in, so you’re good to go wirelessly out of the box.
What’s the warranty?
3 years parts and labor. We also include lifetime tech support. Accidental damage and third-party mods aren't covered.
Can I change parts before buying?
Yep – just contact us for a custom quote or tweak. Email: sales@radiumpcs.com.au or call 1300 935 884.
Do you ship overseas?
Currently we ship Australia wide (Free!) and to the United States of America
How long will it take to get my order?
Delivery times depend on your location and begin once your order has shipped. Domestic orders usually arrive within 5-7 business days after dispatch, while international deliveries take 7-16 days. Full tracking and delivery details will be provided in your confirmation email.