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.

Overview

The GeForce GTX 645 is manufactured by NVIDIA. It was released in May 31 2010. It features the Fermi architecture. The core clock speed is 607 MHz. It has 352 shading units. The thermal design power (TDP) is 200W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 1,880 points. Launch price was $279.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar

Based on actual market prices and performance benchmarks.

FPS Benchmarks

Predicted performance for GeForce GTX 645 across popular games. Tested paired with Ryzen 7 7800X3D to isolate GPU performance.

Technical Analysis

Detailed breakdown of GeForce GTX 645 specifications and capabilities.

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Graphics Performance

The GeForce GTX 645 scores 1,880 in the G3D Mark benchmark (the standard measure of rasterization GPU performance), placing it in the Entry Level tier as a Legacy generation graphics card. It is built on the Fermi (2010−2014) architecture (codename: GF100), manufactured on a 40 nm process— smaller process nodes improve power efficiency and transistor density. It packs 352 shader units (the primary compute units for rendering pixels), 44 TMUs (texture mapping units), and 32 ROPs (render output units that handle final pixel output). Raw FP32 compute power: 0.8554 TFLOPS — this measures the theoretical peak floating-point performance.

Specification	GeForce GTX 645
G3D MarkPassMark 3D graphics benchmark score	1,880
ArchitectureGPU microarchitecture generation	Fermi (2010−2014)
CodenameInternal GPU die codename	GF100
Manufacturing ProcessFabrication node — smaller = more efficient	40 nm
Shader UnitsCore compute units for rendering/compute	352
TMUsTexture Mapping Units — handle texture sampling	44
ROPsRender Output Units — final pixel/color blending	32
Base ClockGuaranteed minimum GPU frequency	607 MHz
Compute (FP32)Peak single-precision floating-point performance	0.8554 TFLOPS
Texture Fill RateTextures processed per second	26.75 GTexel/s
PCIe InterfaceCPU↔GPU data link generation	PCIe 2.1 x16
Transistor Count	3,100 million
Performance RankPosition in global GPU performance ranking	#618

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Video Memory (VRAM)

The GeForce GTX 645 is equipped with 1 GB of GDDR5 video memory connected via a 128-bit memory bus, delivering Unknown of bandwidth. Memory operates at 8 Gbps effective speed.

Specification	GeForce GTX 645
VRAM SizeVideo memory capacity — more = better for high-res textures	1 GB
VRAM TypeMemory technology generation	GDDR5
Memory BusWidth of data path — wider = more bandwidth	128-bit
Memory SpeedEffective memory data rate	8 Gbps
BandwidthMaximum data throughput between GPU and VRAM	Unknown
L1 Cache	704 kB
L2 Cache	512 kB

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Advanced Features & APIs

Graphics API support: DirectX 11.0, Vulkan 1.2, OpenGL 4.6— latest API versions enable the most advanced rendering features like ray tracing and mesh shaders.

Specification	GeForce GTX 645
NVIDIA Reflex	❌ Not Supported
DLSS Frame Generation	❌ Not Supported
DLSS Super Resolution	❌ Not Supported
DirectXMicrosoft graphics API version	11.0
VulkanCross-platform graphics API	1.2
OpenGLLegacy graphics API	4.6
Compute APIGPGPU framework (CUDA/ROCm/OpenCL)	CUDA 3.0
Multi-GPUSLI/CrossFire/NVLink support	None

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Display & Media

Display outputs: DVI-Ix 0, HDMI 1.4ax 1, DisplayPort 1.2x 2 — supports up to 3 simultaneous displays. Hardware encoder: NVENC (1st Gen), decoder: PureVideo VP5— dedicated hardware for video encoding/decoding accelerates streaming, recording, and video playback. Supported codecs: MPEG-2,VC-1,H.264,MPEG-4.

Specification	GeForce GTX 645
0 PortsNumber of 0 display connectors	DVI-Ix
1 PortsNumber of 1 display connectors	HDMI 1.4ax
2 PortsNumber of 2 display connectors	DisplayPort 1.2x
Max DisplaysMaximum simultaneously connected monitors	3
Hardware EncoderVideo encoding engine version	NVENC (1st Gen)
Hardware DecoderVideo decoding engine version	PureVideo VP5
CodecsSupported video compression formats	MPEG-2,VC-1,H.264,MPEG-4

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Power & Dimensions

The GeForce GTX 645 draws 200 Watt under load (TDP) — a 300W PSU minimum is recommended. Power connector: None. Physical size: 147mm long, 111mm tall, occupying 1 expansion slots, weighing 400g— verify your case has clearance before purchasing. Typical temperatures: 35 at idle, 80 under load.

Specification	GeForce GTX 645
TDPPower consumption under load	200 Watt
Recommended PSUMinimum power supply wattage	300W
Power ConnectorRequired PCIe power cable type	None
Card LengthGPU card length — check case clearance	147mm
Card Height	111mm
Slot WidthExpansion slots occupied	1-slot
Weight	400g
Idle TemperatureTypical temperature at desktop idle	35
Load TemperatureTypical temperature under gaming load	80

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Value Analysis

At an average price of $20 (MSRP: $150), the GeForce GTX 645 delivers 94 G3D Mark points per dollar. Overall performance ranking position: #618 among all indexed GPUs.

Specification	GeForce GTX 645
MSRPManufacturer's Suggested Retail Price	$150
Avg Price (30d)Average market price over the last 30 days	$20
Performance RankPosition in global GPU performance ranking	#618
Release Date	May 31 2010
Release Year	2010