GeForce GT 645 vs Radeon R9 M385X

CPU

GPU

GeForce GT 645

2012Core: Up to 710 MHz

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Radeon R9 M385X

2015Core: 1000 MHzBoost: 1100 MHz

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GeForce GT 645 vs Radeon R9 M385X Performance Spectrum

GeForce GT 645

2 GB 32

2,006

+0.6%

GeForce GTX 1650 Ti with Max-Q Design

1,994

0.0%

Radeon RX 9060 XT 16GB

About G3D Mark

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 645 vs Radeon R9 M385X 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 645 vs Radeon R9 M385X: 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 645

2012

Why buy it

✅Costs $201 less on MSRP ($99 MSRP vs $300 MSRP).
✅Delivers 204.9% more G3D Mark for each dollar spent, at 20.3 vs 6.6 G3D/$ ($99 MSRP vs $300 MSRP).
✅300% more VRAM for high-resolution textures and newer games (2 GB vs 512 MB).
✅Draws 32W instead of 75W, a 43W reduction.

Trade-offs

❌Lower average FPS than Radeon R9 M385X 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.

Radeon R9 M385X

2015

Why buy it

✅95.2% more average FPS across 50 tracked games in our benchmark data.

Trade-offs

❌Less VRAM, with 512 MB vs 2 GB for high-resolution textures and newer games.
❌2015 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌
203% HIGHER MSRP
$300 MSRPvs$99 MSRP
❌Lower G3D Mark per dollar, at 6.6 vs 20.3 G3D/$ ($300 MSRP vs $99 MSRP).
❌134.4% higher power demand at 75W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon R9 M385X is the faster gaming card right now. In our data, it leads by 95.2% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward GeForce GT 645 instead at 2,006 vs 1,994, so for this question the real-game FPS result matters more than the synthetic split.

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

GeForce GT 645 is the safer long-term pick for 2026 and beyond. The case is simple: 2 GB vs 512 MB of VRAM. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

GeForce GT 645 makes the most sense to buy today. It is $201 cheaper on MSRP at $99 vs $300, and it leads G3D-per-dollar by 204.9% (20.3 vs 6.6), which is enough to swing the recommendation its way. Radeon R9 M385X still makes more sense if max raw gaming performance matters more than value.

GeForce GT 645 vs Radeon R9 M385X Technical Specifications

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

GeForce GT 645

The GeForce GT 645 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: 2,006 points.

Radeon R9 M385X

The Radeon R9 M385X is manufactured by AMD. It was released in May 5 2015. It features the GCN 2.0 architecture. The core clock ranges from 1000 MHz to 1100 MHz. It has 896 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,994 points.

⚡

Graphics Performance

The GeForce GT 645 scores 2,006 and the Radeon R9 M385X reaches 1,994 in the G3D Mark benchmark — just a 0.6% difference, making them near-identical in rasterization performance. The GeForce GT 645 is built on Kepler while the Radeon R9 M385X uses GCN 2.0, both on a 28 nm process. Shader units: 384 (GeForce GT 645) vs 896 (Radeon R9 M385X). Raw compute: 0.5445 TFLOPS (GeForce GT 645) vs 1.971 TFLOPS (Radeon R9 M385X).

Feature	GeForce GT 645	Radeon R9 M385X
G3D Mark Score	2,006	1,994
Architecture	Kepler	GCN 2.0
Process Node	28 nm	28 nm
Shading Units	384	896+133%
Compute (TFLOPS)	0.5445 TFLOPS	1.971 TFLOPS+262%
ROPs	16	16
TMUs	32	56+75%
L1 Cache	32 KB	224 KB+600%
L2 Cache	256 KB	256 KB

✨

Advanced Features (DLSS/FSR)

The GeForce GT 645 gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon R9 M385X leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GT 645	Radeon R9 M385X
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)

The GeForce GT 645 has 2 GB of VRAM, while the Radeon R9 M385X carries 512 MB. GeForce GT 645 gives you 300% 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 GT 645 and 128-bit on the Radeon R9 M385X.

Feature	GeForce GT 645	Radeon R9 M385X
VRAM Capacity	2 GB+300%	0.5 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit	128-bit
L2 Cache	256 KB	256 KB

🖥️

Display & API Support

DirectX support: 12 (11_0) (GeForce GT 645) vs 12 (12_0) (Radeon R9 M385X). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 4.

Feature	GeForce GT 645	Radeon R9 M385X
DirectX	12 (11_0)	12 (12_0)
Vulkan	1.2	1.2
OpenGL	4.6	4.6
Max Displays	3	4+33%

🎬

Media & Encoding

Hardware encoder: NVENC (1st Gen) (GeForce GT 645) vs VCE 2.0 (Radeon R9 M385X). Decoder: NVDEC (1st Gen) vs UVD 4.2. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 645) vs H.264,MPEG-4,VC-1,MPEG-2 (Radeon R9 M385X).

Feature	GeForce GT 645	Radeon R9 M385X
Encoder	NVENC (1st Gen)	VCE 2.0
Decoder	NVDEC (1st Gen)	UVD 4.2
Codecs	H.264,MPEG-2,VC-1	H.264,MPEG-4,VC-1,MPEG-2

🔌

Power & Dimensions

The GeForce GT 645 draws 32W versus the Radeon R9 M385X's 75W — a 80.4% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (GeForce GT 645) vs 350W (Radeon R9 M385X). Power connectors: PCIe-powered vs Mobile. Card length: 145mm vs 0mm, occupying 1 vs 0 slots. Typical load temperature: 80 vs 85.

Feature	GeForce GT 645	Radeon R9 M385X
TDP	32W-57%	75W
Recommended PSU	350W	350W
Power Connector	PCIe-powered	Mobile
Length	145mm	0mm
Height	111mm	0mm
Slots	1	0-100%
Temp (Load)	80-6%	85
Perf/Watt	62.7+136%	26.6

💰

Value Analysis

At launch, the GeForce GT 645 came in at $99, while the Radeon R9 M385X launched at $300. On MSRP, GeForce GT 645 was 67% cheaper ($201 less). Performance per dollar on MSRP (G3D Mark / MSRP): 20.3 (GeForce GT 645) vs 6.6 (Radeon R9 M385X) — the GeForce GT 645 offers 207.6% better value. The newer card here is Radeon R9 M385X (2015 vs 2012).

Feature	GeForce GT 645	Radeon R9 M385X
MSRP	$99-67%	$300
Performance per Dollar	20.3+208%	6.6
Codename	GK107	Strato
Release	October 1 2012	May 5 2015
Ranking	#903	#681

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