HARDWARE FIT CHECK • Google Gemma 4 26B MoE + NVIDIA GeForce RTX 3090 (24GB GDDR6X)20.23 GB / 24 GB VRAM

Can I Run Google Gemma 4 26B MoE on NVIDIA GeForce RTX 3090 (24GB GDDR6X)?

Full VRAM footprint analysis, tokens/sec generation benchmark, and copy-paste Ollama & vLLM runtime commands for running Google Gemma 4 26B MoE (26.4B) on NVIDIA GeForce RTX 3090 (24GB GDDR6X) (24 GB).

✓ FITS IN VRAM20.23 GB (84%)~185 t/s

Target Hardware & Model

interactive
High-speed 4.2B-active MoE assistant for 16GB–24GB consumer GPUs & Apple Silicon
Google Gemma 4 26B MoE on NVIDIA GeForce RTX 3090 (24GB GDDR6X)MoE (4.2B Active / 26.4B Total)

✓ Fits Comfortably in VRAM

✓ FITS IN VRAM
Required VRAM
20.23 GB
84% of hardware capacity (24 GB)
Est. Decode Speed
~185 tok/s
4.2B active params @ 936 GB/s
Available Headroom
+3.77 GB
Safe for OS display & full context
Memory Allocation & Headroom
20.23 GB allocated of 24 GB capacity
84% utilized
Weights: 15.84 GBMoE (4.2B Active)
KV: (32K): 3.09 GB
Overhead: 1.3 GB
Free Headroom: +3.77 GB
Architecture & Throughput Transparency: Single-user decode speed (~185 tok/s) is memory-bandwidth bound at batch size = 1 on NVIDIA GeForce RTX 3090 (24GB GDDR6X) (936 GB/s). Prompt prefill / TTFT (~2,683 tok/s) is compute-bound and utilizes GPU Tensor cores. Actual latency varies with FlashAttention-2 and runtime engine (Ollama/vLLM/llama.cpp).
MoE Memory vs Speed Architecture: While decode throughput scales with the active parameter count (4.2B parameters streamed per token), all 26.4B parameters must be resident in VRAM so the dynamic router can route tokens to any expert layer.

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
24 GB VRAM

NVIDIA GeForce RTX 3090 (24GB GDDR6X)

The #1 budget 24GB card for local LLMs, running 14B–32B models and Q4 70B quantized

936 GB/s350W TDP

Quantization Precision Matrix

32K ctx • KV: Q8_0
QuantizationWeightsKV CacheTotal VRAMEst. SpeedFit Status
FP1616 bpw52.8 GB3.09 GB58.49 GB (244%)0 t/sOOM
Q8_08.5 bpw27.98 GB3.09 GB32.8 GB (137%)0 t/sOOM
Q6_K6.56 bpw21.65 GB3.09 GB26.25 GB (109%)~32 t/sPARTIAL
Q5_K_M5.68 bpw18.74 GB3.09 GB23.24 GB (97%)~162 t/sFITS
Q4_K_M4.8 bpw15.84 GB3.09 GB20.23 GB (84%)~185 t/sFITS
FP44.25 bpw13.99 GB3.09 GB18.32 GB (76%)~203 t/sFITS
IQ3_XS3.3 bpw10.82 GB3.09 GB15.04 GB (63%)~244 t/sFITS
FAQ & Reference

Frequently Asked Questions: Google Gemma 4 26B MoE on NVIDIA GeForce RTX 3090 (24GB GDDR6X)

How much VRAM does Google Gemma 4 26B MoE need on NVIDIA GeForce RTX 3090 (24GB GDDR6X)?

At standard 4-bit quantization (Q4_K_M) with 32K context, Google Gemma 4 26B MoE requires 20.23 GB of total VRAM (weights + KV cache + CUDA runtime overhead).

What inference speed will Google Gemma 4 26B MoE achieve on NVIDIA GeForce RTX 3090 (24GB GDDR6X)?

Based on NVIDIA GeForce RTX 3090 (24GB GDDR6X)'s 936 GB/s memory bandwidth, expected decode speed is approximately 185 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.