NVS 570 (128MB)

[RonRonRon232]

Hi All
On Lenovo's, backordered from hell, website the only avaible Worstation class T series is the t61P 14" equiped with a 128MB NVS 570,
Previously all models that were listed came with the 256MB version...
how do they compare?
Also which is better a t60p with a V5200 (256mb) or a t61p with a NVS 570 (128MB)?

[pheos]

First of: Its not an NVS 570 its an FX 570m!

The difference is that the 14" version only has half of the video ram, and half of the memory Bandwidth (about 11 Gb/s).

How much that impacts the performance depends on the game or the application.

3Dmark 2006 scores drop from 3300 to 2300.
But I play Half Live with all high details on 1280 x 1024 on a 14" super smooth!

[Pascal_TTH]

First of: Its not an NVS 570 its an FX 570m!

The difference is that the 14" version only has half of the video ram, and half of the memory Bandwidth (about 11 Gb/s).

How much that impacts the performance depends on the game or the application.

3Dmark 2006 scores drop from 3300 to 2300.
But I play Half Live with all high details on 1280 x 1024 on a 14" super smooth!

Only 128 MB is not too bad and even enough foir gaming but if it's only an half memory bus, it will directly affect performances.

[pheos]

Only 128 MB is not too bad and even enough foir gaming but if it's only an half memory bus, it will directly affect performances.

No it won't... for modern games the latency of the memory is way more impotent than the bandwith!!

I mean you can transfer 11 GB/s or 22 Gb/s but from where ??
Neither your HDD or the RAM can support that speed...

[Pascal_TTH]

DDR2-667 running Dual Channel brings 10,6 GB/s.

No it won't... for modern games the latency of the memory is way more impotent than the bandwith!!

So why NVIDIA and AMD bore themself to have about 100 GB/s memory bandwith with GeForce 8800 Ultra and Radeon HD 2900 XT ?

[Troels]

So why NVIDIA and AMD bore themself to have about 100 GB/s memory bandwith with GeForce 8800 Ultra and Radeon HD 2900 XT ?

Exactly, latency is of course a problem, but the bandwidth is also important because of higher detail textures along with the huge amount of shader programming that has been introduced during the last 3-4 years.

[Pascal_TTH]

Best is not the good ! In desktop, we can have until 512 bits memory bus size and 900 MHz GDDR3 with very fast respond time. But it can fit a latpot... So mobile GPU are compromise between price, performances, thermal, consommation, space, cooling and so on.