Iris Plus Graphics 655 vs Radeon R6 M340DX

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 655 vs Radeon R6 M340DX 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 655 vs Radeon R6 M340DX: 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 655

2018

Why buy it

✅Draws 15W instead of 30W, a 15W 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 512 MB for high-resolution textures and newer games.
❌2018 hardware with Unknown of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Radeon R6 M340DX

2015

Why buy it

✅100+% more VRAM for high-resolution textures and newer games (512 MB vs Unknown).
✅Iris Plus Graphics 655 is already obsolete for modern gaming, so Radeon R6 M340DX is the less risky modern option long term.

Trade-offs

❌2015 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌100% higher power demand at 30W vs 15W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon R6 M340DX is the faster gaming card right now based on the synthetic data we have. It leads by 4.1% in PassMark G3D (1,800 vs 1,729), which is the best performance signal available in this matchup.

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

Radeon R6 M340DX is the safer long-term pick for 2026 and beyond. The case is simple: 512 MB 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 R6 M340DX makes the most sense today based on the pricing and value data we have for this matchup.

Iris Plus Graphics 655 vs Radeon R6 M340DX Technical Specifications

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

Iris Plus Graphics 655

The Iris Plus Graphics 655 is manufactured by Intel. It was released in April 3 2018. 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: 1,729 points.

Radeon R6 M340DX

The Radeon R6 M340DX is manufactured by AMD. It was released in December 12 2015. It features the GCN 1.0 architecture. The core clock ranges from 955 MHz to 1030 MHz. It has 384 shading units. The thermal design power (TDP) is 30W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,800 points.

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Graphics Performance

The Iris Plus Graphics 655 scores 1,729 and the Radeon R6 M340DX reaches 1,800 in the G3D Mark benchmark — just a 4.1% difference, making them near-identical in rasterization performance. The Iris Plus Graphics 655 is built on Generation 9.5 while the Radeon R6 M340DX uses GCN 1.0, both on 14 nm+++ vs 28 nm. Shader units: 384 (Iris Plus Graphics 655) vs 384 (Radeon R6 M340DX). Raw compute: 0.8064 TFLOPS (Iris Plus Graphics 655) vs 0.791 TFLOPS (Radeon R6 M340DX). Boost clocks: 1050 MHz vs 1030 MHz.

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
G3D Mark Score	1,729	1,800+4%
Architecture	Generation 9.5	GCN 1.0
Process Node	14 nm+++	28 nm
Shading Units	384	384
Compute (TFLOPS)	0.8064 TFLOPS+2%	0.791 TFLOPS
Boost Clock	1050 MHz+2%	1030 MHz
ROPs	6	8+33%
TMUs	48+100%	24

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Advanced Features (DLSS/FSR)

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
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 655 has 0 MB of VRAM, while the Radeon R6 M340DX carries 512 MB. Radeon R6 M340DX 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 655 and 64-bit on the Radeon R6 M340DX.

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
VRAM Capacity	Shared System RAM	0.5 GB
Memory Type	Shared	GDDR5
Bus Width	System	64-bit

🖥️

Display & API Support

DirectX support: 12 (12_1) (Iris Plus Graphics 655) vs 12_0 (Radeon R6 M340DX). Maximum simultaneous displays: 3 vs 0.

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
DirectX	12 (12_1)	12_0
Max Displays	3	0

🎬

Media & Encoding

Hardware encoder: QuickSync (Iris Plus Graphics 655) vs VCE 2.0 (Radeon R6 M340DX). Decoder: QuickSync vs UVD 4.2.

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
Encoder	QuickSync	VCE 2.0
Decoder	QuickSync	UVD 4.2
Codecs	H.264,H.265,VP9	—

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Power & Dimensions

The Iris Plus Graphics 655 draws 15W versus the Radeon R6 M340DX's 30W — a 66.7% difference. The Iris Plus Graphics 655 is more power-efficient. Recommended PSU: 1W (Iris Plus Graphics 655) vs 350W (Radeon R6 M340DX). Power connectors: Integrated vs PCIe-powered. Card length: 0mm vs 1mm, occupying 0 vs 0 slots.

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
TDP	15W-50%	30W
Recommended PSU	1W-100%	350W
Power Connector	Integrated	PCIe-powered
Length	0mm	1mm
Height	0mm	—
Slots	0	0
Temp (Load)	85	—
Perf/Watt	115.3+92%	60.0

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Value Analysis

At launch, the Iris Plus Graphics 655 came in at $0, while the Radeon R6 M340DX launched at $0. Performance per dollar on MSRP (G3D Mark / MSRP): Infinity (Iris Plus Graphics 655) vs Infinity (Radeon R6 M340DX) — the Radeon R6 M340DX offers NaN% better value. The newer card here is Iris Plus Graphics 655 (2018 vs 2015).

Feature	Iris Plus Graphics 655	Radeon R6 M340DX
MSRP	$0	$0
Performance per Dollar	Infinity	Infinity
Codename	Coffee Lake GT3e	Jet
Release	April 3 2018	December 12 2015
Ranking	#723	#852

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