Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 645 (OEM) Radeon HD 7750 VTX3D 1GB DDR3 Edition
Red Dead Redemption 2 365% 386%
Halo: Reach 48% 55%
Cyberpunk 2077 539% 568%
Call of Duty: Modern Warfare 365% 386%
Doom Eternal 300% 318%
Microsoft Flight Simulator 539% 568%
Grand Theft Auto VI 611% 643%
Dragon Ball Z Kakarot 187% 200%
Star Wars: Jedi - Fallen Order 539% 568%
Need For Speed Heat 365% 386%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 645 (OEM) are marginally better than the AMD Radeon HD 7750 VTX3D 1GB DDR3 Edition.

The GTX 645 has a 23 MHz higher core clock speed and 16 more Texture Mapping Units than the HD 7750. This results in the GTX 645 providing 13.9 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 645 has a 23 MHz higher core clock speed than the HD 7750 and the same number of Render Output Units. This results in the GTX 645 providing 0.4 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 645 was released less than a year after the HD 7750, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GeForce GTX 645 (OEM) and the Radeon HD 7750 VTX3D 1GB DDR3 Edition have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The GTX 645 has 38.4 GB/sec greater memory bandwidth than the HD 7750, which means that the memory performance of the GTX 645 is noticeably better than the HD 7750.

The GeForce GTX 645 (OEM) has 576 Shader Processing Units and the Radeon HD 7750 VTX3D 1GB DDR3 Edition has 512. However, the actual shader performance of the GTX 645 is 511 and the actual shader performance of the HD 7750 is 348. The GTX 645 having 163 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 645 delivers a noticeably smoother and more efficient experience when processing graphical data than the HD 7750.

The GeForce GTX 645 (OEM) requires 65 Watts to run but there is no entry for the Radeon HD 7750 VTX3D 1GB DDR3 Edition. We would recommend a PSU with at least 450 Watts for the GTX 645 and a PSU with at least 400 Watts for the HD 7750. The GTX 645 has been recommended a PSU with 50 Watts more than the HD 7750. The difference is significant enough that the GTX 645 may have a slight adverse affect on your yearly electricity bills in comparison to the HD 7750.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed823 MHzvs800 MHz
Boost Clock888 MHzvs-
ArchitectureKepler GK106GCN 1.0 Cape Verde PRO
OC Potential Fair vs Good
Driver Support Good vs Good
Release Date22 Apr 2013vs01 Oct 2012
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs
green tick vs
green tick vs
green tick vs green tick
vs green tick

GPU Memory

Memory1024 MBvs1024 MB
Memory Speed1000 MHzvs800 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeGDDR5vsDDR3
Memory Bandwidth64GB/secvs25.6GB/sec
L2 Cache 384 KB vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units576vs512
Actual Shader Performance25%vs17%
Texture Mapping Units48vs32
Texture Rate39.5 GTexel/svs25.6 GTexel/s
Render Output Units16vs16
Pixel Rate13.2 GPixel/svs12.8 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs1
DVI Connections2vs1
HDMI Connections1vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power65 Watts-
Recommended PSU450 Watts & 33 Ampsvs400 Watts

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs4.4
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3250 3.5GHz-
Recommended RAM8 GB-
Maximum Recommended Gaming Resolution1600x900-

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTX 645 is an OEM only, Fast-Middle-Class Graphics Card based on the First Revision of the Kepler Architecture.

The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU.

It equips a GPU codenamed Kepler GK106 which has 3 Stream Multiprocessors activated and thus offers 576 Shader Processing Units, 48 TMUs and 16 ROPs. The Central Unit is Initially Clocked at 823 and goes up to 888MHz, in Turbo Mode.

The GPU accesses a 1GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1000MHz.

DirectX 11.0 Support (11.0 Hardware Default) and support for Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies.

Power Consumption
With a rated board TDP of 65W, it requires at least a 450W PSU and it relies entirely on the PCI Slot for power, meaning no extra connectors are required.

Gaming Benchmarks put its Performance on average with GeForce GTX 650.

System Suggestions
We recommend a Modest Processor (Intel Core i3) and 8GB of RAM for a system with GeForce GTX 645.
Radeon HD 7750 VTX3D 1GB DDR3 Edition is a special edition of the fast-middle-class Radeon HD 7750 1GB DDR3.
This version has no new features (when compared to the DDR3 version) and so it performs exactly like it.
Recommended CPU
Possible GPU Upgrades
GPU Variants