Iris Plus Graphics 645 vs Radeon R9 M365X

G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

Iris Plus Graphics 645 vs Radeon R9 M365X FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with Ryzen 7 9800X3D to isolate GPU performance.

Search any supported game below to compare 1080p FPS for both components.

Iris Plus Graphics 645 vs Radeon R9 M365X: Pros, Cons & Final Verdict

See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.

Iris Plus Graphics 645

2019

Why buy it

✅Draws 15W instead of 75W, a 60W reduction.
✅More future proof: Generation 9.5 (2016−2020) on 14nm with a newer platform for upcoming games.

Trade-offs

❌Less VRAM, with Unknown vs 4 GB for high-resolution textures and newer games.
❌2019 hardware with Unknown of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌Lower G3D Mark per dollar, at 0 vs 5.9 G3D/$ (Unknown MSRP vs $250 MSRP).

Radeon R9 M365X

2015

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 5.9 vs 0 G3D/$ ($250 MSRP vs Unknown MSRP).
✅100+% more VRAM for high-resolution textures and newer games (4 GB vs Unknown).
✅Iris Plus Graphics 645 is already obsolete for modern gaming, so Radeon R9 M365X is the less risky modern option long term.

Trade-offs

❌2015 hardware with 4 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌400% higher power demand at 75W vs 15W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon R9 M365X is the faster gaming card right now based on the synthetic data we have. It leads by 2.2% in PassMark G3D (1,482 vs 1,450), which is the best performance signal available in this matchup.

Which GPU is the safer long-term pick for 2026 and beyond?

Radeon R9 M365X is the safer long-term pick for 2026 and beyond. The case is simple: 4 GB vs Unknown of VRAM and the newer upscaling stack, FSR Upscaling / FSR 4 (2025) instead of no meaningful modern upscaling stack. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

Radeon R9 M365X makes the most sense today based on the pricing and value data we have for this matchup.

Iris Plus Graphics 645 vs Radeon R9 M365X Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Iris Plus Graphics 645

The Iris Plus Graphics 645 is manufactured by Intel. It was released in October 7 2019. It features the Generation 9.5 architecture. The core clock ranges from 300 MHz to 1050 MHz. It has 384 shading units. The thermal design power (TDP) is 15W. Manufactured using 14 nm+++ process technology. G3D Mark benchmark score: 1,450 points.

Radeon R9 M365X

The Radeon R9 M365X is manufactured by AMD. It was released in May 5 2015. It features the GCN 1.0 architecture. The core clock ranges from 900 MHz to 925 MHz. It has 640 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,482 points.

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Graphics Performance

The Iris Plus Graphics 645 scores 1,450 and the Radeon R9 M365X reaches 1,482 in the G3D Mark benchmark — just a 2.2% difference, making them near-identical in rasterization performance. The Iris Plus Graphics 645 is built on Generation 9.5 while the Radeon R9 M365X uses GCN 1.0, both on 14 nm+++ vs 28 nm. Shader units: 384 (Iris Plus Graphics 645) vs 640 (Radeon R9 M365X). Raw compute: 0.8064 TFLOPS (Iris Plus Graphics 645) vs 1.184 TFLOPS (Radeon R9 M365X). Boost clocks: 1050 MHz vs 925 MHz.

Feature	Iris Plus Graphics 645	Radeon R9 M365X
G3D Mark Score	1,450	1,482+2%
Architecture	Generation 9.5	GCN 1.0
Process Node	14 nm+++	28 nm
Shading Units	384	640+67%
Compute (TFLOPS)	0.8064 TFLOPS	1.184 TFLOPS+47%
Boost Clock	1050 MHz+14%	925 MHz
ROPs	6	16+167%
TMUs	48+20%	40

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Advanced Features (DLSS/FSR)

Feature	Iris Plus Graphics 645	Radeon R9 M365X
Upscaling Tech	Upscaling support	FSR Upscaling / FSR 4
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	Standard	AMD Anti-Lag

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Video Memory (VRAM)

The Iris Plus Graphics 645 has 0 MB of VRAM, while the Radeon R9 M365X carries 4 GB. Radeon R9 M365X gives you 100+% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is System on the Iris Plus Graphics 645 and 128-bit on the Radeon R9 M365X.

Feature	Iris Plus Graphics 645	Radeon R9 M365X
VRAM Capacity	Shared System RAM	4 GB
Memory Type	Shared	GDDR5
Memory Bandwidth	System	Unknown
Bus Width	System	128-bit

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Power & Dimensions

The Iris Plus Graphics 645 draws 15W versus the Radeon R9 M365X's 75W — a 133.3% difference. The Iris Plus Graphics 645 is more power-efficient. Recommended PSU: 1W (Iris Plus Graphics 645) vs 350W (Radeon R9 M365X). Power connectors: Integrated vs Mobile.

Feature	Iris Plus Graphics 645	Radeon R9 M365X
TDP	15W-80%	75W
Recommended PSU	1W-100%	350W
Power Connector	Integrated	Mobile
Perf/Watt	96.7+388%	19.8

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Value Analysis

At launch, the Iris Plus Graphics 645 came in at $0, while the Radeon R9 M365X launched at $250. On MSRP, Iris Plus Graphics 645 was 100+% cheaper ($250 less). Performance per dollar on MSRP (G3D Mark / MSRP): Infinity (Iris Plus Graphics 645) vs 5.9 (Radeon R9 M365X) — the Iris Plus Graphics 645 offers Infinity% better value. The newer card here is Iris Plus Graphics 645 (2019 vs 2015).

Feature	Iris Plus Graphics 645	Radeon R9 M365X
MSRP	$0-100%	$250
Performance per Dollar	Infinity	5.9
Codename	Coffee Lake GT3e	Tropo
Release	October 7 2019	May 5 2015
Ranking	#720	#769

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