Question 1

How much VRAM does Phi-3-medium-4k-instruct need?

Accepted Answer

Phi-3-medium-4k-instruct (14B) requires approximately 31.203563690185547 GB of VRAM at full precision (FP16), 15.6 GB at 8-bit quantization (Q8), and 7.8 GB at 4-bit quantization (Q4). The actual VRAM usage may be slightly higher due to KV cache and runtime overhead.

Question 2

What GPUs can run Phi-3-medium-4k-instruct?

Accepted Answer

We have 10 compatible GPUs indexed for Phi-3-medium-4k-instruct, including RTX 5090, A40, L40S, L40, A100 80GB PCIe and 5 more. Compatibility is determined by whether the GPU's VRAM can fit the model's memory footprint, potentially using quantization to reduce memory usage.

Question 3

What is the cheapest GPU to run Phi-3-medium-4k-instruct?

Accepted Answer

The cheapest GPU to run Phi-3-medium-4k-instruct in the cloud is the RTX 5090 at $0.44/hr. Other affordable options include A40 ($0.44/hr) and L40S ($0.86/hr). Prices reflect the lowest on-demand rate across cloud providers.

Question 4

Can Phi-3-medium-4k-instruct run on consumer hardware?

Accepted Answer

Yes, Phi-3-medium-4k-instruct can run on consumer GPUs like the RTX 5090 (32 GB VRAM) at full precision (FP16).

Question 5

What quantization options are available for Phi-3-medium-4k-instruct?

Accepted Answer

Phi-3-medium-4k-instruct supports the following quantization levels: FP16 (full precision): ~31.203563690185547 GB, Q8 (8-bit): ~15.6 GB, Q6 (6-bit): ~11.7 GB, Q4 (4-bit): ~7.8 GB. Lower quantization reduces VRAM usage at the cost of some quality loss. Q8 offers a good balance between quality and memory savings, while Q4 provides maximum compression.

GPU	VRAM	Best Quant	From	Rent
RTX 5090	32 GB	Q8	$0.44/hr	Rent
A40	48 GB	FP16	$0.44/hr	Rent
L40S	48 GB	FP16	$0.86/hr	Rent
L40	48 GB	FP16	$0.99/hr	Rent
A100 80GB PCIe	80 GB	FP16	$1.39/hr	Rent
A100 80GB	80 GB	FP16	$1.39/hr	Rent
A100 40GB	40 GB	FP16	$1.61/hr
MI300X	192 GB	FP16	$1.99/hr	Rent
GH200	96 GB	FP16	$2.29/hr
H100 MEGA	80 GB	FP16	$2.39/hr	Rent

Phi-3-medium-4k-instruct

VRAM Requirements

Compatible GPUs

Phi-3-medium-4k-instruct FAQ

VRAM requirements for Phi-3-medium-4k-instruct at different quantization levels
Quantization	VRAM Required
FP16	31.2 GB
Q8	15.6 GB
Q6	11.7 GB
Q4	7.8 GB