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Diamond Multimedia Radeon 9550 256MB DDR (Model: S120AGP256) is an AGP 4x/8x
ATI

Diamond Multimedia Radeon 9550 256MB DDR (Model: S120AGP256) is an AGP 4x/8x

Bottom line: The ATI Diamond Multimedia Radeon 9550 256MB DDR is an AGP 4x/8x is a specs-and-price decision rather than a crowd-consensus one in the expansion cards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Before you buy

  • Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

AGP Video Card Tested to be fully functional. AGP 8X/4X (1.5V). ATI Radeon 9550 (RV350 LX). Designed for Windows XP/2000, compatible with AGP 1.5V slots (AGP 4x/8x). 1x DVI-I, 1x VGA (D-Sub), 1x S-Video.

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SpecPicks Verdict

SpecPicks scored ATI Diamond Multimedia Radeon 9550 256MB DDR is an AGP 4x/8x using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. ATI's expansion cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Full Specifications

vram_mb256
memory_typeDDR
core_codenameRV350

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Diamond Multimedia Radeon 9550 256MB DDR (Model: S120AGP256) is an AGP 4x/8x is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Diamond Multimedia Radeon 9550 256MB DDR (Model: S120AGP256) is an AGP 4x/8x
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