Continuação: Qual máquina eu compro? - Placa de Vídeo
Autor: Felipo | Publicado: 2009-11-26T09:21:00-02:00

&nbsp;Vamos continuar com nosso papo sobre qual máquina comprar.

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<!--[if !supportLists]-->Placa de Vídeo – eu já perdi a conta de quantos modelos lançam todo o mês, não necessariamente melhores que as anteriores, mas possuem pelo menos um custo mais barato e ainda existe o aperfeiçoamento de uma mesma tecnologia. Todo computador tem uma placa de vídeo, que pode ser “onboard”, ou seja, vem junto com a placa mãe; ou “offboard”, é uma plaquinha a mais conectada no seu PC.
<!--[if !supportLists]-->o&nbsp;&nbsp; <!--[endif]-->Onboard – Em quase 100% dos casos, a placa de vídeo onboard é da marca do CHIPTSET da placa mãe (SiS, ViA, Intel, etc.). Se você utiliza apenas o básico ou até mesmo um avançado sem partes gráficas, a onboard da conta do recado. Além de economizar energia do PC, você economiza dinheiro.
<!--[if !supportLists]-->o&nbsp;&nbsp; <!--[endif]-->Offboard – a lista de placas é enorme, e poderíamos criar um texto tão grande quanto esse somente para explicar sobre placas de vídeo. As vezes, o modelo muda apenas um numero e muda tudo sobre o produto. A placa de vídeo é separada em duas “marcas”: a do criador do chip gráfico e a da fabricante da placa. Do chip fica fácil: nVidia ou ATI, basicamente.
<!--[if !supportLists]-->§&nbsp; <!--[endif]-->ATI x nVidia: no início dos tempos, ATI dominava o mercado. No meio dos tempos, a nVidia acelerou e ultrapassou. Hoje, o páreo é acirrado. Se a nVidia lança um modelo melhor, a ATI lança uma igual ou melhor logo em seguida, e vice-versa. É claro que no final das contas ambas tem prós e contras, mas você no fundo terá uma boa placa de vídeo. Agora, se você quer a melhor, se apegue aos detalhes, como capacidade de processamento (bits), capacidade de armazenamento (em megabytes) e capacidade de transferência (clock).
<!--[if !supportLists]-->·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <!--[endif]-->BITS: o item mais importante da placa de vídeo, até mesmo mais que memória. Prefira uma placa de 128 bits e 128mb do que uma com 64 bits e 512 mb. Esses “bits” é a quantidade de informação que será processada ao mesmo tempo (a grosso modo).
<!--[if !supportLists]-->·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <!--[endif]-->Memória: importante, ainda mais se você tem um monitor grande. Se você quer jogar/trabalhar com uma resolução de tela boa, sua placa de vídeo deve ter memória para armazenar o tamanho da tela. Quanto maior a quantidade de informações necessárias na tela, mais memória de vídeo será utilizada.
<!--[if !supportLists]-->·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <!--[endif]-->Clock: é a velocidade, igual ao que existe nos processadores. Hoje já temos placas de vídeo com a mesma velocidade de um processador topo de linha. Placas de vídeo desse tipo chegam a custar R$ 3000
<!--[if !supportLists]-->§&nbsp; <!--[endif]-->Fabricantes – elas usam a patente ou da AMD ou da nVidia e criam uma placa de vídeo com suas próprias características, sejam elas quais forem. Temos XFX, MSI, ASUS, Sapphire, PixelView, eVGA, ECS, INNO3D, e por ai vai. Umas viabilizam custo, outras performance. Algumas fabricantes chegam até a melhorar o desempenho dos chips. Todas possuem linhas baratas e linhas caras, vai do gosto e do bolso.
<!--[if !supportLists]-->o&nbsp;&nbsp; <!--[endif]-->OBS.: a placa de vídeo é um item delicado. Se você quer processamento de vídeo para algum tipo de aplicativo mas ainda está confuso, não exite de conversar com alguém que entenda. Infelizmente, nem todo vendedor é gente boa, as vezes nem entende do que está vendendo.