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ASUS - ROG Astral RTX 5080 OC vs AMD - Radeon RX 7900 XT

Last updated · How Mars Score works
ROG Astral RTX 5080 OCASUSRENDER
Probe A
ASUS
ROG Astral RTX 5080 OC
78.7/ 100A
Benchmarks91· 40%
Core71· 30%
Memory64· 20%
Power & Form· 10%
Radeon RX 7900 XTAMDRENDER
Probe B
AMD
Radeon RX 7900 XT
66.7/ 100C
Benchmarks68· 40%
Core61· 30%
Memory72· 20%
Power & Form· 10%
Quick verdict

Between the ROG Astral RTX 5080 OC and Radeon RX 7900 XT, the ROG Astral RTX 5080 OC comes out ahead in cuda / stream cores and 3dmark time spy, while the Radeon RX 7900 XT wins on tdp and vram. Overall, the ROG Astral RTX 5080 OC scores 78.7 and the Radeon RX 7900 XT scores 66.7 on our Mars Score.

Buying advice

Which should you buy?

The ROG Astral RTX 5080 OC is the clear pick on raw spec strength, leading by 12.0 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the ROG Astral RTX 5080 OC if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are cuda / stream cores, 3dmark time spy, boost clock, among others.

Pick the Radeon RX 7900 XT if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are tdp, vram, memory bus.

Both ship with comparable ray tracing cores, so those specs don't separate the two — focus on the differences below.

Bottom line: the ROG Astral RTX 5080 OC is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why ASUS - ROG Astral RTX 5080 OC wins

  • CUDA / Stream cores — 100.00% more. 10752 vs 5376.
  • 3DMark Time Spy — 72.87% more. 32500 vs 18800.
  • Boost clock — 10.63% more. 2655 MHz vs 2400 MHz.
  • Has DLSS.

Why AMD - Radeon RX 7900 XT wins

  • TDP — 45.00 W less. 315 vs 360.
  • VRAM — 25.00% more. 20 GB vs 16 GB.
  • Memory bus — 25.00% more. 320 bit vs 256 bit.
Full readout

Spec comparison

Core

SpecASUS - ROG Astral RTX 5080 OCAMD - Radeon RX 7900 XT
ChipsetGB203Navi 31
Base clock2295 MHzlead1500 MHz
Boost clock2655 MHzlead2400 MHz
CUDA / Stream cores10752lead5376
Ray tracing cores8484

Memory

SpecASUS - ROG Astral RTX 5080 OCAMD - Radeon RX 7900 XT
VRAM16 GB20 GBlead
VRAM typeGDDR7leadGDDR6
Memory bus256 bit320 bitlead

Power & Form

SpecASUS - ROG Astral RTX 5080 OCAMD - Radeon RX 7900 XT
TDP360 W315 Wlead
Recommended PSU850 W750 Wlead
Length357 mm276 mmlead
Slot size3.5-slot2.5-slot

Benchmarks

SpecASUS - ROG Astral RTX 5080 OCAMD - Radeon RX 7900 XT
3DMark Time Spy32500lead18800
DLSStrueleadfalse
FSRfalsetruelead
Reader questions

Frequently asked

Which has more VRAM, ROG Astral RTX 5080 OC or Radeon RX 7900 XT?+

Radeon RX 7900 XT ships with 20GB GDDR6 vs 16GB.

Which scores higher in 3DMark Time Spy, ROG Astral RTX 5080 OC or Radeon RX 7900 XT?+

ROG Astral RTX 5080 OC scores 32500 vs 18800.

Which draws less power, ROG Astral RTX 5080 OC or Radeon RX 7900 XT?+

Radeon RX 7900 XT draws 315W TDP vs 360W.

Drill down

Spec-level deep dives

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