salut,
pour le clavier, faut pas non mettre trop dedans vu ton budget, quelques exemples entre 25 et 50 euros:
https://www.amazon.fr/Rii-M%C3%A9canique-Couleurs-r%C3%A9tro-%C3%A9clair%C3%A9-Filaire/dp/B01LQALV5K/ref=sr_1_20?s=computers&ie=UTF8&qid=1479756210&sr=1-20&keywords=clavier+m%C3%A9canique
https://www.amazon.fr/SteelSeries-Clavier-Gaming-M%C3%A9canique-AZERTY/dp/B004ZRFISS/ref=sr_1_6?s=computers&ie=UTF8&qid=1479756210&sr=1-6&keywords=clavier+m%C3%A9canique
https://www.amazon.fr/MantisTek-Clavier-Backlit-M%C3%A9canique-d%C3%A9clairage/dp/B01I9V6JQU/ref=sr_1_5?s=computers&ie=UTF8&qid=1479756667&sr=1-5&keywords=clavier+mecanique
https://www.amazon.fr/VTIN-Clavier-M%C3%A9canique-Touches-Dactylo/dp/B01D8F45NQ/ref=sr_1_7?s=computers&ie=UTF8&qid=1479756210&sr=1-7&keywords=clavier+m%C3%A9canique
https://www.amazon.fr/Clavier-VTIN-Filaire-R%C3%A9tro%C3%A9clair%C3%A9-M%C3%A9canique-Similaire/dp/B01I5ATPCU/ref=sr_1_10?s=computers&ie=UTF8&qid=1479756210&sr=1-10&keywords=clavier+m%C3%A9canique
l'écran:
https://www.amazon.fr/gp/offer-listing/B0157V5TS4/ref=sr_1_2_olp?s=computers&ie=UTF8&qid=1479756706&sr=1-2&keywords=gw2270&condition=new
(ou http://www.rueducommerce.fr/Peripheriques-Reseaux-wifi/Ecran/Moniteur-PC/BENQ/4950417-GW2270.htm%23xtor=SEC-802-GOO-%5BP%C3%A9riph%C3%A9riques%2C+r%C3%A9seaux+et+wifi%5D-%5B%7Bifdyn%3Adyn%7D%7Bifpe%3Ape%7D%7Bifpla%3Apla%7D%5D-%5BRSYS%3A1%3A4950417%5D-%7Badwords_producttargetid%7D?gclid=Cj0KEQiA08rBBRDUn4qproqwzYMBEiQAqpzns6o43BzDf5_l_Y2Ky4xzH8nlnP0wqkIFjdcLBkwdJcsaArHh8P8HAQ sur RDC)
la tour:
commun
http://www.rueducommerce.fr/Composants/Carte-Graphique/Carte-Graphique-ATI/SAPPHIRE-TECHNOLOGY/4957488-Radeon-NITRO-R9-FURY-4G-HBM.htm
https://www.amazon.fr/gp/offer-listing/B005T3GRNW/ref=sr_1_1_olp?s=computers&ie=UTF8&qid=1479756884&sr=1-1&keywords=1+to&condition=new
https://www.amazon.fr/Cooler-Master-MCX-B5S1-KWNN-11-Bo%C3%AEtier-PC/dp/B01F9S55Z2/ref=sr_1_1?s=computers&ie=UTF8&qid=1479756850&sr=1-1&keywords=masterbox
https://www.amazon.fr/EVGA-100-B1-0600-K2-Alimentation-PC-600/dp/B018WJMXKA/ref=sr_1_1?s=computers&ie=UTF8&qid=1479756866&sr=1-1&keywords=evga+600b
proc carte mère ram (ventirad)
https://www.amazon.es/Intel-BX80662I76700-Procesador-1151-i7-6700/dp/B0136JONG8/ref=sr_1_1?ie=UTF8&qid=1479757145&sr=8-1&keywords=i7+6700
https://www.amazon.fr/MSI-H110M-Carte-Intel-Socket/dp/B018XP3AI2/ref=sr_1_1?s=computers&ie=UTF8&qid=1479757161&sr=1-1&keywords=h110m
https://www.amazon.fr/Crucial-CT8G4DFS8213-M%C3%A9moire-DDR4-DIMM/dp/B01BIWLFGQ/ref=sr_1_1?s=computers&ie=UTF8&qid=1479757293&sr=1-1&keywords=8+go+ddr4+2133
ou
https://www.amazon.es/Intel-I5-6400-Procesador-i5-6400/dp/B010T6CG7E/ref=sr_1_1?ie=UTF8&qid=1479757316&sr=8-1&keywords=i5+6400
http://www.magicpc.fr/cartes-meres-intel/62713-asrock-z170-pro4-ddr4-carte-mere-4717677327014.html
https://www.amazon.fr/Kingston-HyperX-FURY-M%C3%A9moire-DDR4/dp/B013H7QBTG/ref=sr_1_2?s=computers&ie=UTF8&qid=1479757547&sr=1-2&keywords=8+go+ddr4+2666
https://www.amazon.fr/gp/offer-listing/B00PKJ21LW/ref=sr_1_1_olp?s=computers&ie=UTF8&qid=1479757666&sr=1-1&keywords=thermalright+macho&condition=new (ou http://www.cdiscount.com/informatique/ventilation-refroidissement/thermalright-macho-120-rev-a/f-10789-fctrma120ra.html?gclid=Cj0KEQiA08rBBRDUn4qproqwzYMBEiQAqpzns0Kc8Fxakfa4x9E6e_gu4JowLsfzD4R9HwXP3vFG3GkaAkSf8P8HAQ&s_kwcid=AL!639!3!95135149402!!!g!!&cid=search&cm_mmc=SE_mckv!_Shopping_ShoppingCD&ef_id=WAVAVAAAAL9TTEVu:20161121194831:s si ça dépasse)