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21/06/2015

Lenovo IdeaPad Y560D Battery

The T7300 in the 6024W needed 59 seconds to complete the calculation to 2 million digits. This is 3 seconds faster than the T7200 in my X60plus and typical for this CPU. The speed boost over the T7200 is probably attributable to the Intel Dynamic Acceleration allowing one core to run at 2.2GHz, although the faster FSB may also be a factor.It is also worth checking up the memory performance of the 965GM chipset using Sandra’s memory bandwidth benchmark. The measured speed is over just over 4000MB/s. This is about 700MB/s faster than I have personally measured for the 945PM chipset so it appears that the new chipset offers better memory bandwidth without increasing the bus speed. However, this bandwidth is about 300MB/s than I measured for the 965PM chipset (dedicated GPU) which may be the result of the integrated GPU sharing the memory bandwidth.The 6024W managed a score of 910 3DMarks for 3DMark05. The test was run at 1024*768 resolution with no anti-aliasing.

This result is typical for the Intel X3100 GPU and is about double the score for the previous generation of Intel GPUs (945GM) although it is behind the 1151 3DMarks which I measured for the Samsung R20 with the ATI 1250M integrated GPU. It is possible that a future driver will unlock additional hardware features and improve performance.The 3Dmark06 score for the 6024W was 561 3DMarks. This test was run at 1280*768 with no anti-aliasing. This is slightly faster than the ATI1250M GPU in the Samsung R20 and much faster than the previous generation of Intel GPUs. However, it is only about half the performance of the Nvidia 8400M G.The power supply is a large 90W (19V, 4.74A) unit made by Liteon. It is larger than the equivalent PSUs provided with Samsung notebooks and is less efficient. There is a power drain of 5W from the mains socket when the PSU is plugged in but not connected to the notebook. The Samsung PSUs drain no more than 2W under the same conditions. I suspect that the same inefficiency applies under use – I see a power drain from the wall socket of around 35W under light usage.

90W is an unnecessarily large PSU for a notebook with integrated graphics and it adds to the travel weight. The good news is that the power connector is a standard size. I have another PSU which worked with my Asus W3A and it also works with the Zepto.The 6-cell battery is rated at 10.8V, 4.8AH, 51.84WHr which is quite low by current standards. I purchased two batteries and the internal battery data of neither reflects the capacity on the label. What is worse, the nominal capacity (as reported by RMClock) is declining with use. I have asked Zepto about this but not received any explanation.

It appears that the battery is either not fully recharging or is getting erroneous calibration data.Zepto’s datasheet for the 6024W indicates a battery life of up to 3.5 hours, which should not be impossible for a notebook with an integrated GPU. However, I have been unable to get to 3 hours in real use. At the moment I can see three possible factors for the missing battery time: (a) I suspect that the bigger cache of the T7300 causes higher CPU power leakage (assuming Zepto tested with a CPU with 2MB cache); (b) Zepto tested with the backlight on the minimum setting which is designed for owls, not humans; and (c) 10% of my battery capacity has disappeared already. The charts below show power drain at a reasonable (3/8) brightness and at the minimum brightness.

Under light usage and adequate brightness the power drain is normally between 16 and 17W. On minimum backlight the drain can go below 15W. I am planning to install Turbo Memory which should add a few minutes by allowing the hard disk to power down.A further interesting feature is the battery has significant capacity remaining when it has 0% charge remaining. The screen shots below were taken five minutes apart and the computer ran for another minute or two before stopping. However, running a fuel tank on empty is never to be recommended and Zepto need to sort out the battery calibration.What about heat and fan noise? Heat is not a problem in this notebook. It has integrated graphics but a generous cooling system designed for a powerful GPU. However, the fan is noisier than on the Samsung notebooks I have been using although it is only noticeable in a quiet room. I think this is because the fan is just under the keyboard with no intermediate material to block the noise. An intermediate soundproofing layer would be desirable. At higher temperatures the fan speeds up and the noise gets obtrusive.

The downward-facing speakers on the beveled sides of the computer appear to benefit from the computer being on a table top so that the sound can be reflected upwards. Both audio quantity and quality are relatively good with a hint of bass.Keyboard and Touchpad13 E7440 keyboardThe keyboard has good travel compared to most Ultrabooks. The bold white lettering is backlit (an option) to improve legibility under all lighting conditions. The layout includes Page Up and Page Down keys above the cursor left and right keys. The Caps Lock key includes an indicator light, but there are no indicators for the Num Lock and Scroll Lock which are accessed using the Fn key.

The touchpad is noticeably smaller than the pad on the Samsung NP900X4C and is a consequence of using not just separate, rather than embedded, touchpad buttons but also having a second set of buttons for a pointing stick. Nonetheless, the touchpad has proved to be quite usable once I had found the registry hack to change the default reverse setting for the two finger scroll. My E7440 includes a fingerprint and smartcard reader on the right side of the palm rest.The G11 scored 2.0 on the Windows Experience Index. The weak link was the desktop graphics with 2.0, followed by gaming graphics at 2.8 and the CPU at 2.9 while the HDD scored 3.9. Installing 2GB RAM raised the score to 2.1. For comparison, the Samsung Q35 which also has the GMA 950 scored 2.3. I prefer Vista without the eye candy, bells and whistles and, with those features suppressed, visual performance is quite acceptable.SuperPiNo review is complete without a SuperPi result. SuperPi is often used as a test for raw CPU performance. The U1500 in the G11 needed 1 minute 46 seconds to complete the calculation to 2 million digits.

This is in proportion to the clock speed compared with other Core series CPUs but is significantly faster than a 1.6GHz Pentium M or 1.6GHz mobile Pentium 4.The VAIO G11 managed a score of 357 3DMarks for 3DMark05. The test was run at 1024*768 resolution with no anti-aliasing. This result is significantly worse than for the Samsung Q35 which also has the Intel 945GM GPU and may reflect power-saving changes in the GMS chipset (the single channel memory access being one) which affect performance. The G11 is compared below with other results for notebooks with integrated graphics.Cinebench is a good rendering benchmark tool based on the powerful 3D software, CINEMA 4D. Its rendering tasks can stress up to sixteen multiprocessors on the same computer. It is a free benchmarking tool, and can be found at http://www.cinebench.com.

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