ZOTAC GeForce GT 640 2 GB

ZOTAC GeForce GT 640 2 GB

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Introduction



About one month ago, NVIDIA released their GeForce GT 640 Series without much fanfare. The new GT 640 is based on the company's award-winning Kepler architecture, but uses a smaller, less powerful graphics processor than the GK104 GPU, we've come to love on GTX 670, 680 and 690. GT 640 also does not feature NVIDIA's boost clock algorithm which dynamically adjust clocks to increase performance if the card is running below its TDP limit.

The GeForce GT 640 is based on a 28 nm GK107 GPU, with a CUDA core count of 384. Unlike its high-end brethren, the card uses cheaper, but slower DDR3 memory, which you would also find on your mobo's memory modules, for example.



ZOTAC's GT 640, is one of the few single-slot GTX 640 cards on the market, which means it might be interesting for HTPC users. Clocks have remained at the NVIDIA default of 891 MHz GPU and 900 MHz memory. While there are variants with 1 GB memory, ZOTAC has put 2 GB on the card, whether this makes much sense is something we will know at the end of the review. Price-wise GT 640 is definitely not cheap, with a current retail price of $110 there are many options to consider, cheaper and more expensive.

GeForce GT 640 Market Segment Analysis
 GeForce
GT 520
Radeon
HD 5550
GeForce
GT 440
Radeon
HD 5670
GeForce
GT 640
Radeon
HD 6670
GeForce
GTS 450
Radeon
HD 5750
Radeon
HD 5770
Radeon
HD 7750
GeForce
GTX 550 Ti
Radeon
HD 6790
Radeon
HD 6850
Shader Units4832096400384480192720800512192800960
ROPs484816816161616241632
Graphics ProcessorGF119RedwoodGF108RedwoodGK107TurksGF106JuniperJuniperCape VerdeGF116BartsBarts
Transistors???M627M585M627M???M716M1170M1040M1040M1500M1170M1700M1700M
Memory Size1024 MB1024 MB1024 MB1024 MB2048 MB1024 MB1024 MB1024 MB1024 MB1024 MB1024 MB1024 MB1024 MB
Memory Bus Width64 bit128 bit128 bit128 bit128 bit128 bit128 bit128 bit128 bit128 bit192 bit256 bit256 bit
Core Clock810 MHz550 MHz823 MHz775 MHz902 MHz800 MHz783 MHz700 MHz850 MHz800 MHz900 MHz840 MHz775 MHz
Memory Clock800 MHz1000 MHz800 MHz1000 MHz891 MHz1000 MHz900 MHz1150 MHz1200 MHz1125 MHz1026 MHz1050 MHz1000 MHz
Price$45$50$60$70$110$65$105$90$110$110$120$120$140
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