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Zotac GeForce GTX 460 768Mb review

In this review, we will get acquainted with Zotac SYNERGY GeForce GTX 460 768Mb [ZT-40401-10P] graphic card

Design features

To take off cards’ housing and heatsink you have to remove four screws which tighten the cooling system and the card using backplate:

Zotac GTX 460 stock cooling system

Copper base of the cooling system is connected to heatsink via two heat pipes:

Zotac GTX 460 heatsink, bottom view

Zotac GTX 465 heatsink, top view

There is no additional cooling solutions for memory chips and power transistors.
The distance between mounting holes of cooling system is 2.4″x 2″ (6.1mm x 5.1mm) which makes GTX 460 incompatible with majority of modern alternative video card coolers.

The card has GTX 460 reference design board:

GTX 460 board

GPU is fed through tree-phased power subsystem:

Zotac GTX 460 768Mb power system

Power transistor specification allows it to operate at temperaturesup-to 125°С. According to documentation, each phase is limited to 30 A.

NCP5388 chip controls GPU voltage:


The same controlleris used in GTX 465 and GTX 470 cards of reference deign — the chip can’t be controlled through I2C bus. As we already know, NVIDIA engineers created VID method to control voltage in Fermi cards.

Memory chips are fed through separate single-phased power subsystem:

GTX 460 memory chip power subsystem

Zotac GTX 460 uses same power transistors as reference design GTX 460 board do.
The cards uses Samsung memory chips with the following marking K4G10325FE-HC05:

GTX 460 memory chips

Chip specification allows it to operate at 4000 MHz (effective) clocks:

Samsung K4G10325FE-HC05 chip specification
Small ClassificationGDDR5 SDRAM
Density, Refresh1G, 8K/32ms
Interface, VDD, VDDQPOD_15, 1.5V, 1.5V
Package170FBGA (Halogen Free & Lead Free)
Temp, PowerCommercial Normal
Speed ( Wafer/Chip Biz/BGD : 00 )0.5ns (4.0Gbps)

1 Comment

# Avatar Yarrak Dayı,

very good review.Thank you very much.

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