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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTS 250 XFX Core 1GB Edition GeForce GT 640
Cyberpunk 2077 495% 653%
Hitman 3 674% 880%
Resident Evil 8 495% 653%
Assassins Creed: Valhalla 444% 589%
FIFA 21 200% 280%
Grand Theft Auto VI 737% 960%
Call of Duty: Black Ops Cold War 426% 567%
Genshin Impact 495% 653%
Far Cry 6 761% 990%
The Medium 642% 840%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTS 250 XFX Core 1GB Edition are noticeably better than the Nvidia GeForce GT 640.

The GeForce GT 640 has a 164 MHz higher core clock speed than the GTS 250, but the GTS 250 has 32 more Texture Mapping Units than the GeForce GT 640. As a result, the GTS 250 exhibits a 18.3 GTexel/s better Texture Fill Rate than the GeForce GT 640. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GT 640 has a 164 MHz higher core clock speed than the GTS 250 and the same number of Render Output Units. This results in the GeForce GT 640 providing 2.6 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 GeForce GT 640 was released over three years more recently than the GTS 250, and so the GeForce GT 640 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GTS 250 when running the latest games.

The GeForce GT 640 has 1024 MB more video memory than the GTS 250, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GTS 250 has superior memory performance.

The GTS 250 has 35.5 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the GTS 250 is noticeably better than the GeForce GT 640.

The GeForce GTS 250 XFX Core 1GB Edition has 128 Shader Processing Units and the GeForce GT 640 has 384. However, the actual shader performance of the GTS 250 is 236 and the actual shader performance of the GeForce GT 640 is 346. The GeForce GT 640 having 110 better shader performance is not particularly notable, as altogether the GTS 250 performs better when taking into account other relevant data.

The GeForce GT 640 transistor size technology is 27 nm (nanometers) smaller than the GTS 250. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the GTS 250.

The GeForce GTS 250 XFX Core 1GB Edition requires 150 Watts to run and the GeForce GT 640 requires 65 Watts. We would recommend a PSU with at least 450 Watts for the GTS 250 and a PSU with at least 350 Watts for the GeForce GT 640. The GTS 250 requires 85 Watts more than the GeForce GT 640 to run. The difference is significant enough that the GTS 250 may have an adverse affect on your yearly electricity bills in comparison to the GeForce GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed738 MHzvs902 MHz
Boost Clock-vs-
ArchitectureTesla G92-428-B1Kepler GK107-300-A2
OC Potential Fair vs Fair
Driver Support Poor vs Good
Release Date04 Mar 2009vs05 Jun 2012
GPU LinkGD LinkGD Link

Resolution Performance

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GPU Memory

Memory1024 MBvs2048 MB
Memory Speed1000 MHzvs891 MHz
Memory Bus256 Bitvs128 Bit
Memory TypeGDDR3vsDDR3
Memory Bandwidth64GB/secvs28.5GB/sec
L2 Cache 0 KB vs green tick 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units128vs384
Actual Shader Performance11%vs17%
Texture Mapping Units64vs32
Texture Rate47.2 GTexel/svs28.9 GTexel/s
Render Output Units16vs16
Pixel Rate11.8 GPixel/svs14.4 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs1
DVI Connections2vs1
HDMI Connections1vs1
DisplayPort Connections0vs-

GPU Power Requirements

Max Power150 Wattsvs65 Watts
Recommended PSU450 Watts & 30 Ampsvs350 Watts & 26 Amps

GPU Features

Shader Model4.0vs5.0
Open GL3.3vs4.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core 2 Duo E7500 2.93GHzvsIntel Core i3-3220 3.3GHz
Recommended RAM6 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTS 250 XFX Core 1GB Edition is a Special Edition of NVIDIA's Fast-Middle-Class GeForce GTS 250, created by XFX.

Overclock: Central Unit

Overclock: Memory Clock
The Operating Memory Clock was decreased from 1100MHz to 1000MHz.

Frame Buffer

Cooling Solution

Performance is worse than the Reference GeForce GTS 250.
GeForce GT 640 is a 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 GK107-300-A2 which has 2 Stream Multiprocessor activated and thus offers 384 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is clocked at 902MHz.

The GPU accesses a 2GB frame buffer of DDR3, through a 128-bit memory interface. The size of the frame buffer is exaggerated and in no way benefits the GPU. The Memory Clock Operates at 891MHz.

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 350W 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 Radeon HD 6670.

System Suggestions
We recommend a Modest Processor (Intel Core i3) and 8GB of RAM for a system with GeForce GT 640.
Recommended CPU
Possible GPU Upgrades
GPU Variants