HARDWARE FIT CHECK • Qwen 2.5 Coder 7B Instruct + 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)7.11 GB / 48 GB VRAM

Can I Run Qwen 2.5 Coder 7B Instruct on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)?

Full VRAM footprint analysis, tokens/sec generation benchmark, and copy-paste Ollama & vLLM runtime commands for running Qwen 2.5 Coder 7B Instruct (7.6B) on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM) (48 GB).

✓ FITS IN VRAM7.11 GB (15%)~213 t/s

Target Hardware & Model

interactive
GPU Topology / Quantity2x Dual-GPU Rig (48GB Pool)
Pre-configured 2x GPU tensor-parallel topology (48GB total VRAM, 1648 GB/s aggregate bandwidth)
High-efficiency code assistant fitting 8GB–16GB consumer GPUs and developer laptops
Qwen 2.5 Coder 7B Instruct on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)

✓ Fits Comfortably in VRAM

✓ FITS IN VRAM
Required VRAM
7.11 GB
15% of hardware capacity (48 GB)
Est. Decode Speed
~213 tok/s
Dense model @ 1648 GB/s
Available Headroom
+40.89 GB
Safe for OS display & full context
Memory Allocation & Headroom
7.11 GB allocated of 48 GB capacity
15% utilized
Weights: 4.56 GB
KV: (32K): 0.94 GB
Overhead: 1.61 GB
Free Headroom: +40.89 GB
Architecture & Throughput Transparency: Single-user decode speed (~213 tok/s) is memory-bandwidth bound at batch size = 1 on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM) (1648 GB/s). Prompt prefill / TTFT (~3,089 tok/s) is compute-bound and utilizes GPU Tensor cores. Actual latency varies with FlashAttention-2 and runtime engine (Ollama/vLLM/llama.cpp).

Local Hardware Configurations & Pricing

High-bandwidth VRAM specs and current market prices
Consumer GPU
32 GB VRAM

NVIDIA GeForce RTX 5090 (32GB GDDR7)

Maximum tokens/sec on 27B–35B models & Blackwell FP4 quantization

1792 GB/s575W TDP
Consumer GPU
24 GB VRAM

NVIDIA GeForce RTX 4090 (24GB GDDR6X)

The 24GB CUDA enthusiast standard for 14B–32B Q4_K_M models

1008 GB/s450W TDP
Multi-GPU Rig
48 GB VRAM

2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)

Best price-to-VRAM homelab rig for Llama 3.3 70B Q4_K_M & Qwen 2.5 Coder 32B Q8_0

1648 GB/s700W TDP
Consumer GPU
16 GB VRAM

NVIDIA GeForce RTX 5080 (16GB GDDR7)

Blazing fast 8B–14B coding models with FP4/Q6_K precision

960 GB/s360W TDP

Quantization Precision Matrix

32K ctx • KV: Q8_0
QuantizationWeightsKV CacheTotal VRAMEst. SpeedFit Status
FP1616 bpw15.2 GB0.94 GB18.12 GB (38%)~66 t/sFITS
Q8_08.5 bpw8.06 GB0.94 GB10.73 GB (22%)~123 t/sFITS
Q6_K6.56 bpw6.23 GB0.94 GB8.84 GB (18%)~158 t/sFITS
Q5_K_M5.68 bpw5.4 GB0.94 GB7.98 GB (17%)~181 t/sFITS
Q4_K_M4.8 bpw4.56 GB0.94 GB7.11 GB (15%)~213 t/sFITS
FP44.25 bpw4.03 GB0.94 GB6.56 GB (14%)~240 t/sFITS
IQ3_XS3.3 bpw3.12 GB0.94 GB5.62 GB (12%)~305 t/sFITS
FAQ & Reference

Frequently Asked Questions: Qwen 2.5 Coder 7B Instruct on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)

How much VRAM does Qwen 2.5 Coder 7B Instruct need on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)?

At standard 4-bit quantization (Q4_K_M) with 32K context, Qwen 2.5 Coder 7B Instruct requires 7.11 GB of total VRAM (weights + KV cache + CUDA runtime overhead).

What inference speed will Qwen 2.5 Coder 7B Instruct achieve on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)?

Based on 2x NVIDIA RTX 3090 Dual Rig (48GB Total VRAM)'s 1648 GB/s memory bandwidth, expected decode speed is approximately 213 tokens per second.

Can I expand context beyond 32K tokens?

Each additional 32K tokens of context requires additional KV cache memory. For longer context windows, consider 8-bit or 4-bit KV cache quantization.