(It *seems to* have an X58 northbridge and an ICH10 southbridge: http://www.findlaptopdriver.com/dx58m01/ )
The GPU is aftermarket, http://www.sapphiretech.com/productdetial.asp?pid=58D84CE3-3BB0-46E0-981A-B86ED31CA295 (The machine has no integrated GPU, and I am unsure what the original add-in GPU was)
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Qubes-HCL-Dell_Inc_-Studio_XPS_435MT-20170711-090912.cpio.gz
Description: GNU Zip compressed data
--- layout: 'hcl' type: 'desktop' hvm: 'yes' iommu: 'no' slat: 'yes' tpm: 'no' remap: 'no' brand: | Dell Inc. model: | Studio XPS 435MT bios: | 1.1.4 cpu: | Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz cpu-short: | Intel i7-920 chipset: | Intel Corporation 5520/5500/X58 I/O Hub to ESI Port [8086:3400] (rev 12) chipset-short: | Intel X58 gpu: | Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn XT [Radeon HD 7870 GHz Edition] [1002:6818] (prog-if 00 [VGA controller]) gpu-short: | Radeon HD 7870 GHz Edition network: | Intel Corporation 82567LF-2 Gigabit Network Connection memory: | 8183 scsi: | WDC WD10EZEX-22B Rev: 1A01 Hitachi HUA72303 Rev: A580 usb: | 8 versions: - works: 'yes' qubes: | R3.2 xen: | 4.6.5 kernel: | 4.4.67-13 remark: | No problems, except that I had to disable /dev/snd/{hwC1D0,controlC1} until PulseAudio was updated credit: | squeegily link: | FIXLINK ---