Sony VAIO VGN-Z31VN/X
Specifications

Price comparison
Average of 2 scores (from 2 reviews)
Reviews for the Sony VAIO VGN-Z31VN/X
Source: Techradar

Sony VAIO Z31 is powerful, portable and usable – this may be the best ultraportable you can buy. Sony's VAIO Z-series offers some of the most complete ultraportable laptops currently available. Its latest model, the VAIO VGN-Z31VN/X, is a powerful machine that also boasts a wealth of impressive features. The Sony VAIO VGN-Z31VN/X is one of the best laptops we've seen for a while. Combining power, portability and usability completely and effortlessly, we have no qualms in recommending it as the best ultraportable currently available.
90
Single Review, online available, Short, Date: 07/03/2009
Rating: Total score: 90%
Source: PC Pro

The Sony VAIO Z-series is one of the smallest laptops we've ever seen, but it still tries to cram in everything you'd expect on a full-size notebook. Its 1.47kg weight is far less than most notebooks, and it's light enough to barely be noticeable when slung in a bag. The 33mm thickness is another reason why the Z-series is ideal for frequent travellers, as long as you've got a well-padded bag for added protection. An ultraportable without compromise: plenty of power, great battery life and superb design.
Single Review, online available, Medium, Date: 05/25/2009
Rating: Total score: 83%
Comment
NVIDIA GeForce 9300M GS: Compared to the 9300M G, the GS has only 8 unified shaders but a higher clock rate. Therefore, the performance should be similar according to Nvidia. Supports
Hybrid-SLI (GeForceBoost and HybridPower) with Nvidia 9100M G and PureVideo HD (VP3).
Only some 3D games with very low demands are playable with these cards.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
Intel Core 2 Duo: This is the Core Duo and Core Solo successor with a longer pipeline and 5-20% more speed without more power consumption. As an addition to the Core Duo design there exists a fourth decoder, an amplified SSE-unit and an additional arithmetical logical unit (ALU).
The Core 2 Duo for laptops is identical to the desktop Core 2 Duo processors but the notebook-processors work with lower voltages (0.95 to 1188 Volt) and a lower Frontside bus clock (1066 vs 667 MHz). The performance of equally clocked notebooks is 20-25% lower than Desktop PCs because of the lower Frontside bus clock and the slower hard disks.
P9600:
The P9600 is a middle class dual-core CPU of the Core 2 Duo line and similar to the T9550 (except for the lower TDP of 25 vs 35W). The performance of the P9600 should be sufficient for most applications and games of 2009.
» Further information can be found in our Comparison of Mobile Processsors.