The body is the bomb. For some time, a computer based on an ATX motherboard lived in it. And he took her in. HDDs are of course a bit hot (I saw a maximum of 42 °), SSDs feel better (about 35-38 °). I have 2 HDDs behind the side wall in their native places (this is behind the wall from the motherboard), I put 2 more SSDs horizontally on the front wall. Now I assembled a new system on a MicroATX motherboard and there was more than enough space for assembly.
Computer case Deepcool Matrexx 55 black
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Creative Labs Sound Blaster Play! 3 External USB Sound Adapter - Compatible with Windows and Mac - Plug and Play (No Drivers Needed) - Enhanced 24-Bit 96Khz Playback Upgrade
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Enhance Your Gaming Experience with Sound BlasterX G6 Hi-Res DAC and USB Sound Card!
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External sound card BEHRINGER U-CONTROL UCA222
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Enhance Your Audio Experience with the Creative 70SB181000000 Sound Blaster X3 Digital Audio Converter - Black
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