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Testing Participants

Nvidia GeForce GTX 650 Ti Boost 2GB

First we’ll take a look at Nvidia's reference sample and then, in alphabetic order, at its versions from other companies.

The Nvidia GeForce GTX 650 Ti Boost looks very simple with its black plastic casing and radial fan, Nvidia logo and imitation rivets.

 

The short PCB is extended with a piece of plastic that supports the cooler's fan. We can also see memory chips on the reverse side of the PCB.

The GeForce GTX 650 Ti Boost has a standard selection of outputs: dual-link DVI-I and DVI-D ports, one HDMI 1.4a, and one DisplayPort 1.2.

One MIO connector for building SLI tandems and one 6-pin power connector can be found in their conventional locations:

 

The GeForce GTX 650 Ti Boost consumes up to 134 watts of power, so a 450-watt or higher PSU is recommended for a computer with one such graphics card inside.

The reference PCB is only 150 mm long. It carries a GPU, eight memory chips, and a 4+1+1-phase (GPU+memory+PLL) power system managed by an ON Semiconductor NCP5395G controller.

The revision A1 GPU is dated the 19th week of 2012. It is clocked at 980 MHz (boostable to 1033 MHz) in 3D applications.


 

 

The card’s 2 GB of GDDR5 memory are represented by Samsung’s K4G20325FD-FC03 chips. They work at their rated clock rate of 6000 MHz in 3D mode and at 648 MHz in 2D mode.

So, it is a perfectly standard GeForce GTX 650 Ti Boost with reference specs:

The cooling system is standard, too. It consists of a plastic casing with a radial fan and an aluminum heatsink with copper base:

The fan's speed is PWM-regulated in a range of 900 to 3300 RPM. The card’s power components have no heatsinks at all.

To check out the cards temperatures we used five runs of the Aliens vs. Predator (2010) benchmark at the highest visual quality settings, at a resolution of 2560x1440 pixels, and with 16x anisotropic filtering. We didn't turn on MSAA because it would have been too high a load for the cards’ memory subsystem and their GPUs wouldn’t have got as hot as possible.

We used MSI Afterburner 3.0.0 beta 10 and GPU-Z version 0.7.1 for monitoring of temperatures inside the closed system case, which configuration is discussed in detail in the corresponding chapter of the roundup. All tests were performed at 25°C room temperature.

When the radial fan was regulated automatically, the GPU of the reference card from Nvidia grew as hot as 79°C. The peak fan speed was 1860 RPM.


Auto fan mode

Maximum fan speed

At the maximum speed of the fan (3240 RPM) the GPU was up to 62°C hot. We’ll use these numbers for comparison with the off-the-shelf products.

The reference GeForce GTX 650 Ti Boost turned out to be good in terms of GPU overclocking, reaching 1140 MHz (and 1193 MHz in boost mode), but its memory could only be overclocked to 6648 MHz.

When overclocked, the GPU got 3°C hotter while the cooler’s fan accelerated by 200 RPM.

So, that’s what the reference GeForce GTX 650 Ti Boost is. Let’s now check out its versions available from graphics card makers.

 
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