GeForce GT 645M vs Radeon HD 4850

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 GT 645M vs Radeon HD 4850 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 GT 645M vs Radeon HD 4850: 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 GT 645M

2012

Why buy it

✅Draws 32W instead of 110W, a 78W reduction.
✅More future proof: Kepler (2012−2018) on 28nm with a newer platform for upcoming games.

Trade-offs

❌Lower average FPS than Radeon HD 4850 across 50 tracked games in our benchmark data.
❌2012 hardware with 2 GB 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 4.8 G3D/$ (Unknown MSRP vs $199 MSRP).

Radeon HD 4850

2008

Why buy it

✅28.3% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 4.8 vs 0 G3D/$ ($199 MSRP vs Unknown MSRP).

Trade-offs

❌2008 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌243.8% higher power demand at 110W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon HD 4850 is the faster gaming card right now. In our data, it leads by 28.3% in average FPS across 50 tracked games in our benchmark data and by 0.1% in PassMark G3D (946 vs 945), so the answer here is pretty clean.

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

GeForce GT 645M is the safer long-term pick for 2026 and beyond. The case is simple: a 28nm process instead of 55nm and a newer 2012 generation instead of 2008. That makes it the less risky pick as game demands keep moving.

Which GPU is the better buy today?

Radeon HD 4850 makes the most sense today based on the pricing and value data we have for this matchup. If you are mainly targeting 1080p and some 1440p, Radeon HD 4850 is the easier value choice. If you care more about 1080p and some 1440p headroom, GeForce GT 645M has the stronger long-term case.

GeForce GT 645M vs Radeon HD 4850 Technical Specifications

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

GeForce GT 645M

The GeForce GT 645M is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 945 points.

Radeon HD 4850

The Radeon HD 4850 is manufactured by AMD. It was released in June 25 2008. It features the TeraScale architecture. The core clock speed is 625 MHz. It has 800 shading units. The thermal design power (TDP) is 110W. Manufactured using 55 nm process technology. G3D Mark benchmark score: 946 points. Launch price was $199.

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Graphics Performance

The GeForce GT 645M scores 945 and the Radeon HD 4850 reaches 946 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GT 645M is built on Kepler while the Radeon HD 4850 uses TeraScale, both on 28 nm vs 55 nm. Shader units: 384 (GeForce GT 645M) vs 800 (Radeon HD 4850). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 1 TFLOPS (Radeon HD 4850).

Feature	GeForce GT 645M	Radeon HD 4850
G3D Mark Score	945	946
Architecture	Kepler	TeraScale
Process Node	28 nm	55 nm
Shading Units	384	800+108%
Compute (TFLOPS)	0.5445 TFLOPS	1 TFLOPS+84%
ROPs	16	16
TMUs	32	40+25%
L1 Cache	32 KB	160 KB+400%
L2 Cache	256 KB	256 KB

✨

Advanced Features (DLSS/FSR)

The GeForce GT 645M gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon HD 4850 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GT 645M	Radeon HD 4850
Upscaling Tech	Upscaling support	FSR Upscaling / FSR 4
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	AMD Anti-Lag

💾

Video Memory (VRAM)

Both cards ship with 2 GB of GDDR5. Memory bus width is 128-bit on the GeForce GT 645M and 64-bit on the Radeon HD 4850.

Feature	GeForce GT 645M	Radeon HD 4850
VRAM Capacity	2 GB	2 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit+100%	64-bit
L2 Cache	256 KB	256 KB

🖥️

Display & API Support

DirectX support: 11.0 (GeForce GT 645M) vs 10.1 (Radeon HD 4850). Vulkan: 1.1 vs N/A. OpenGL: 4.5 vs 3.3. Maximum simultaneous displays: 1 vs 2.

Feature	GeForce GT 645M	Radeon HD 4850
DirectX	11.0+9%	10.1
Vulkan	1.1	N/A
OpenGL	4.5+36%	3.3
Max Displays	1	2+100%

🎬

Media & Encoding

Hardware encoder: NVENC 1.0 (GeForce GT 645M) vs None (Radeon HD 4850). Decoder: PureVideo HD VP5 vs UVD 2.2. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M) vs MPEG-2,VC-1,H.264 (Radeon HD 4850).

Feature	GeForce GT 645M	Radeon HD 4850
Encoder	NVENC 1.0	None
Decoder	PureVideo HD VP5	UVD 2.2
Codecs	MPEG-2,H.264,VC-1,MPEG-4 ASP	MPEG-2,VC-1,H.264

🔌

Power & Dimensions

The GeForce GT 645M draws 32W versus the Radeon HD 4850's 110W — a 109.9% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 450W (Radeon HD 4850). Power connectors: PCIe-powered vs 1x 6-pin. Card length: 0mm vs 246mm, occupying 0 vs 1 slots. Typical load temperature: 70°C vs 95.

Feature	GeForce GT 645M	Radeon HD 4850
TDP	32W-71%	110W
Recommended PSU	350W-22%	450W
Power Connector	PCIe-powered	1x 6-pin
Length	0mm	246mm
Height	0mm	111mm
Slots	0-100%	1
Temp (Load)	70°C-26%	95
Perf/Watt	29.5+243%	8.6

💰

Value Analysis

The newer card here is GeForce GT 645M (2012 vs 2008).

Feature	GeForce GT 645M	Radeon HD 4850
MSRP	—	$199
Codename	GK107	RV770
Release	October 1 2012	June 25 2008
Ranking	#903	#876

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