Computer Upgrade King
Mantis V2 - RTX 5070, AMD Ryzen 7 8700F Processor, 32GB DDR5 RAM, 1TB NVMe Gen4 SSD, Gaming Desktop PC, WiFi 6E + BT, RGB Keyboard+Mouse, HDMI + DP, Windows 11 Pro - Best Prebuilt Gamer Computer
Bottom line: The Ryzen 7 8700F / RTX 5070 prebuilt ($2,349.99 on Amazon as of 2026-10-21 16:18 UTC) has GeForce RTX 5070 graphics, 32GB of DDR5 RAM and a 1TB NVMe SSD.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Pairs a Ryzen 7 8700F processor with GeForce RTX 5070 graphics
- ✓ 1TB NVMe SSD for the OS and game library
- ✓ 32GB of DDR5 RAM leaves headroom for gaming alongside streaming or creative apps
Cons
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
SpecPicks Verdict
SpecPicks scored Mantis V2 - RTX 5070, AMD Ryzen 7 8700F Processor, 32GB DDR5 RAM… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the prebuilt gaming pcs category. Computer Upgrade King's prebuilt gaming pcs lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for prebuilt gaming pcs of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- [CPU] AMD Ryzen 7 8700F Processor (8 Cores, 16 Threads, 4.1 GHz Base Clock Speed up to 5.0 GHz Max Boost Clock Speed) for Elite Gaming and Content Creation with 4nm Leading Edge Technology | [STORAGE] 1TB PCIe Gen4 NVMe M.2 SSD - Experience Hyper-Fast Bootup and Data Transfer thats up to 30x Faster Performance than a Traditional Hard Drive.
- [GPU] NVD Geforce RTX 5070 (12GB GDDR7 dedicated memory) Get All the Power You Need for Fast, Smooth, Power-Efficient Performance | [RAM] 32GB DDR5 RAM Gaming Memory for Seamless Multitasking from Multiple Web Pages to Playing Games Online Simultaneously | [OS] Windows 11 Pro 64-bit
- [FANS] 6 ARGB PWM Fans for Powerful Air Flow and Dynamic Speed Control | [PC CASE] Mantis V2 with Front Panel LEDs, Brushed Aluminum Front Panel Wings, and Tempered Glass Side Panel | No Bloatware | Graphic output options include 1x HDMI and 1x DisplayPort Guaranteed, additional ports may vary | Free Rainbow Backlit USB Keyboard and LED USB mouse
- [BUY WITH CONFIDENCE] Empowered PCs are Assembled in the USA, Rigorously Stress-Tested Before Shipping, and Supported with Lifetime Technical and Diagnostic Support and 3-Year Limited Hardware Warranty.
- The Mantis V2 is the best prebuilt gaming PC ready to run your favorite games at Ultra settings, detailed 1080p Full HD resolution, and smooth 100+ FPS gameplay. Ideal for Content Creators, Streamers, and VR Ready PC.
Full Specifications
| Brand | Computer Upgrade King |
|---|---|
| Color | Black |
| RAM Type | DDR5 RAM |
| CPU Model | AMD R Series |
| CPU Speed | 4.1 GHz |
| Cache Size | 36 MB |
| Model Name | Mantis V2 |
| Model Year | 2021 |
| Resolution | 1920 x 1080 |
| Style Name | Minimalist |
| Unit Count | 1 Count |
| Aspect Ratio | 16:9 |
| Connectivity | USB, WiFi |
| Display Type | LED |
| Memory Speed | 4800 MHz |
| Model Number | Mantis V2 |
| Video Output | HDMI, DisplayPort |
| Compatibility | PC |
| Built-In Media | Keyboard, Mouse, RGB Lighting |
| Cooling Method | liquid cooled |
Performance Data
View gaming FPS, AI inference throughput, and synthetic scores for the NVIDIA GeForce RTX 5070 — the core hardware component in this product. Benchmarks sourced from TechPowerUp, PassMark, and the r/LocalLLaMA community.
Which local LLMs fit in 12 GB?
12 GB holds models up to about 14B at Q4 with a usable context window; above that band the weights spill to system RAM and system-RAM bandwidth sets the speed, not the GPU.
- ✅ 7–9B models (Llama 3.1 8B, Qwen 3 8B) — fits at Q4
- ✅ 12–14B models (Qwen 3 14B, Phi-4) — fits at Q4
- ❌ 20–27B models (Gemma 3 27B, Mistral Small) — needs 20 GB+
- ❌ 30–35B models (Qwen 3 32B, QwQ 32B) — needs 24 GB+
- ❌ 70B models (Llama 3.3 70B, Qwen 2.5 72B) — needs 48 GB+
Across 7 community runs from 6 sources, the NVIDIA GeForce RTX 5070 generates a median 59.1 tok/s on 7–9B models at Q4 (per LocalScore).
Ready to buy?
Mantis V2 - RTX 5070, AMD Ryzen 7 8700F Processor, 32GB DDR5 RAM, 1TB NVMe Gen4 SSD, Gaming Desktop PC, WiFi 6E + BT, RGB Keyboard+Mouse, HDMI + DP, Windows 11 Pro - Best Prebuilt Gamer Computer is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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