GeForce 8400 GS vs GeForce 8600M GT

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.

GeForce 8400 GS vs GeForce 8600M GT 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.

GeForce 8400 GS vs GeForce 8600M GT: Pros, Cons & Final Verdict

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

GeForce 8400 GS

2014

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 5.4 vs 0 G3D/$ ($30 MSRP vs Unknown MSRP).
✅100% more VRAM for high-resolution textures and newer games (512 MB vs 256 MB).
✅Draws 33W instead of 150W, a 117W reduction.

Trade-offs

❌Lower average FPS than GeForce 8600M GT across 50 tracked games in our benchmark data.
❌2014 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

GeForce 8600M GT

2008

Why buy it

✅4.8% more average FPS across 50 tracked games in our benchmark data.

Trade-offs

❌Less VRAM, with 256 MB vs 512 MB for high-resolution textures and newer games.
❌2008 hardware with 256 MB 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 5.4 G3D/$ (Unknown MSRP vs $30 MSRP).
❌354.5% higher power demand at 150W vs 33W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce 8600M GT is the faster gaming card right now. In our data, it leads by 4.8% in average FPS across 50 tracked games in our benchmark data and by 0.6% in PassMark G3D (164 vs 163), so the answer here is pretty clean.

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

GeForce 8400 GS is the safer long-term pick for 2026 and beyond. The case is simple: 512 MB vs 256 MB of VRAM, a 28nm process instead of 65nm, and a newer 2014 generation instead of 2008. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

GeForce 8400 GS makes the most sense today based on the pricing and value data we have for this matchup. GeForce 8600M GT still makes more sense if max raw gaming performance matters more than value.

GeForce 8400 GS vs GeForce 8600M GT Technical Specifications

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

GeForce 8400 GS

The GeForce 8400 GS is manufactured by NVIDIA. It was released in March 17 2014. It features the Maxwell architecture. The core clock ranges from 1029 MHz to 1124 MHz. It has 384 shading units. The thermal design power (TDP) is 33W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 163 points.

GeForce 8600M GT

The GeForce 8600M GT is manufactured by NVIDIA. It was released in July 15 2008. It features the G9x architecture. The core clock speed is 500 MHz. It has 224 shading units. The thermal design power (TDP) is 150W. Manufactured using 65 nm process technology. G3D Mark benchmark score: 164 points.

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Graphics Performance

The GeForce 8400 GS scores 163 and the GeForce 8600M GT reaches 164 in the G3D Mark benchmark — just a 0.6% difference, making them near-identical in rasterization performance. The GeForce 8400 GS is built on Maxwell while the GeForce 8600M GT uses G9x, both on 28 nm vs 65 nm. Shader units: 384 (GeForce 8400 GS) vs 224 (GeForce 8600M GT).

Feature	GeForce 8400 GS	GeForce 8600M GT
G3D Mark Score	163	164
Architecture	Maxwell	G9x
Process Node	28 nm	65 nm
Shading Units	384+71%	224

✨

Advanced Features (DLSS/FSR)

Feature	GeForce 8400 GS	GeForce 8600M GT
Upscaling Tech	Upscaling support	Upscaling support
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	NVIDIA Reflex

💾

Video Memory (VRAM)

The GeForce 8400 GS has 512 MB of VRAM, while the GeForce 8600M GT carries 256 MB. GeForce 8400 GS gives you 100% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 128-bit on the GeForce 8400 GS and 64-bit on the GeForce 8600M GT.

Feature	GeForce 8400 GS	GeForce 8600M GT
VRAM Capacity	0.5 GB+100%	0.25 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit+100%	64-bit

🖥️

Display & API Support

DirectX support: 10.0 (GeForce 8400 GS) vs 11.1 (10_0) (GeForce 8600M GT). OpenGL: 3.3 vs 3.3. Maximum simultaneous displays: 2 vs 2.

Feature	GeForce 8400 GS	GeForce 8600M GT
DirectX	10.0	11.1 (10_0)+11%
OpenGL	3.3	3.3
Max Displays	2	2

🎬

Media & Encoding

Decoder: PureVideo HD VP2 vs PureVideo HD (VP2). Supported codecs: MPEG-2,H.264 (GeForce 8400 GS) vs H.264,VC-1,MPEG-2 (GeForce 8600M GT).

Feature	GeForce 8400 GS	GeForce 8600M GT
Encoder	No	—
Decoder	PureVideo HD VP2	PureVideo HD (VP2)
Codecs	MPEG-2,H.264	H.264,VC-1,MPEG-2

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Power & Dimensions

The GeForce 8400 GS draws 33W versus the GeForce 8600M GT's 150W — a 127.9% difference. The GeForce 8400 GS is more power-efficient. Recommended PSU: 350W (GeForce 8400 GS) vs 350W (GeForce 8600M GT). Power connectors: Legacy vs Legacy. Typical load temperature: 65°C vs 85°C.

Feature	GeForce 8400 GS	GeForce 8600M GT
TDP	33W-78%	150W
Recommended PSU	350W	350W
Power Connector	Legacy	Legacy
Length	170mm	—
Height	106mm	—
Slots	1	0-100%
Temp (Load)	65°C-24%	85°C
Perf/Watt	4.9+345%	1.1

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Value Analysis

At launch, the GeForce 8400 GS came in at $30, while the GeForce 8600M GT launched at $0. On MSRP, GeForce 8600M GT was 100+% cheaper ($30 less). Performance per dollar on MSRP (G3D Mark / MSRP): 5.4 (GeForce 8400 GS) vs Infinity (GeForce 8600M GT) — the GeForce 8600M GT offers Infinity% better value. The newer card here is GeForce 8400 GS (2014 vs 2008).

Feature	GeForce 8400 GS	GeForce 8600M GT
MSRP	$30	$0-100%
Performance per Dollar	5.4	Infinity
Codename	GM108	NB9E-GTX
Release	March 17 2014	July 15 2008
Ranking	#850	#825

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