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ASUS - ROG Astral RTX 5090 OC vs AMD - Radeon RX 7800 XT

Last updated · How Mars Score works
ROG Astral RTX 5090 OCASUSRENDER
Probe A
ASUS
ROG Astral RTX 5090 OC
91.4/ 100S
Benchmarks95· 40%
Core84· 30%
Memory95· 20%
Power & Form—· 10%
Radeon RX 7800 XTAMDRENDER
Probe B
AMD
Radeon RX 7800 XT
62.5/ 100C
Benchmarks64· 40%
Core60· 30%
Memory64· 20%
Power & Form—· 10%
Quick verdict

Between the ROG Astral RTX 5090 OC and Radeon RX 7800 XT, the ROG Astral RTX 5090 OC comes out ahead in cuda / stream cores / ray tracing cores, while the Radeon RX 7800 XT wins on tdp. Overall, the ROG Astral RTX 5090 OC scores 91.4 and the Radeon RX 7800 XT scores 62.5 on our Mars Score.

Buying advice

Which should you buy?

The ROG Astral RTX 5090 OC is the clear pick on raw spec strength, leading by 28.9 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 5090 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, ray tracing cores, 3dmark time spy, among others.

Pick the Radeon RX 7800 XT if you care most about tdp. Its strongest claims are tdp.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

Bottom line: the ROG Astral RTX 5090 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 5090 OC wins

  • ▲CUDA / Stream cores — 466.67% more. 21760 vs 3840.
  • ▲Ray tracing cores — 183.33% more. 170 vs 60.
  • ▲3DMark Time Spy — 166.67% more. 44000 vs 16500.
  • ▲VRAM — 100.00% more. 32 GB vs 16 GB.
  • ▲Memory bus — 100.00% more. 512 bit vs 256 bit.
  • ▲Boost clock — 9.26% more. 2655 MHz vs 2430 MHz.
  • ▲Has DLSS.

Why AMD - Radeon RX 7800 XT wins

  • ▲TDP — 337.00 W less. 263 vs 600.
Full readout

Spec comparison

Core

SpecASUS - ROG Astral RTX 5090 OCAMD - Radeon RX 7800 XT
ChipsetGB202Navi 32
Base clockⓘ2017 MHzlead1295 MHz
Boost clockⓘ2655 MHzlead2430 MHz
CUDA / Stream coresⓘ21760lead3840
Ray tracing coresⓘ170lead60

Memory

SpecASUS - ROG Astral RTX 5090 OCAMD - Radeon RX 7800 XT
VRAMⓘ32 GBlead16 GB
VRAM typeⓘGDDR7leadGDDR6
Memory busⓘ512 bitlead256 bit

Power & Form

SpecASUS - ROG Astral RTX 5090 OCAMD - Radeon RX 7800 XT
TDPⓘ600 W263 Wlead
Recommended PSUⓘ1200 W700 Wlead
Length357 mm267 mmlead
Slot size4-slot2.5-slot

Benchmarks

SpecASUS - ROG Astral RTX 5090 OCAMD - Radeon RX 7800 XT
3DMark Time Spyⓘ44000lead16500
DLSSⓘtrueleadfalse
FSRⓘfalsetruelead
Reader questions

Frequently asked

Which has more VRAM, ROG Astral RTX 5090 OC or Radeon RX 7800 XT?+

ROG Astral RTX 5090 OC ships with 32GB GDDR7 vs 16GB.

Which scores higher in 3DMark Time Spy, ROG Astral RTX 5090 OC or Radeon RX 7800 XT?+

ROG Astral RTX 5090 OC scores 44000 vs 16500.

Which draws less power, ROG Astral RTX 5090 OC or Radeon RX 7800 XT?+

Radeon RX 7800 XT draws 263W TDP vs 600W.

Drill down

Spec-level deep dives

Chipset→Base clock→Boost clock→CUDA / Stream cores→Ray tracing cores→VRAM→VRAM type→Memory bus→TDP→Recommended PSU→Length→Slot size→
By manufacturer

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AMD →4

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