Feeds
80%
Asus EAH4890

AMD ATI Radeon HD 4890

Get ready for gigahertz graphics

  • alert
  • submit to reddit

Intelligent flash storage arrays

Review The new AMD ATI Radeon HD 4890 is heavily based on the HD 4870 but it has some changes in its architecture that allow it to run substantially higher clock speeds.

How much higher? Glad you asked. The 4870 has reference clock speeds of 750MHz for the core and GDDR 5 memory that runs at 900MHz. GDDR 5 is a completely different animal to GDDR 3 so the 900MHz speed equates to an effective speed of 3600MHz. This business of true speed/effective speed could get wearisome so we’re going to stick to effective speeds for this review.

Asus EAH4890

Asus' EAH4890: AMD's Radeon HD 4890 - aka 'RV790' - on board

A reference 4870 runs at 750MHz/3600MHz and a factory overclocked specimen runs a tad faster at 800MHz/4000MHz. You’ll generally find that you can overclock a decent 4870 to 850MHz/4300MHz.

By contrast, the new 4890 comes out of the blocks at 850MHz/3900MHz and is also available in factory overclocked versions with a 900MHz core and memory clocked at 4000MHz. Two weeks after the launch of 4890, we can expect to see a super overclocked variant that will run much faster. We estimate that a 1GHz core speed is quite plausible, with memory running at 4400MHz.

That’s a lot of numbers so let’s recap: a basic 4870 has speeds of 750MHz/3600MHz, and the Asus board we used for testing overclocked to 870MHz/4360MHz. The new 4890 starts at 850MHz/3900MHz, and our Asus sample overclocks to 980MHz/4480MHz.

That’s a useful speed bump and as the 4890 has the same 800 unified-shader stream processors and 256-bit memory controller as the 4870 does, we can expect the extra speed will give a proportional increase in performance.

AMD Radeon 48xx speeds and feeds

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
Don't wait for that big iPad, order a NEXUS 9 instead, industry little bird says
Google said to debut next big slab, Android L ahead of Apple event
Netscape Navigator - the browser that started it all - turns 20
It was 20 years ago today, Marc Andreeesen taught the band to play
A drone of one's own: Reg buyers' guide for UAV fanciers
Hardware: Check. Software: Huh? Licence: Licence...?
The Apple launch AS IT HAPPENED: Totally SERIOUS coverage, not for haters
Fandroids, Windows Phone fringe-oids – you wouldn't understand
Apple SILENCES Bose, YANKS headphones from stores
The, er, Beats go on after noise-cancelling spat
Here's your chance to buy an ancient, working APPLE ONE
Warning: Likely to cost a lot even for a Mac
Xiaomi boss snaps back at Jony Ive's iPhone rival 'theft' swipe
I'll have a handset delivered. Judge us after you try us...
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Win a year’s supply of chocolate
There is no techie angle to this competition so we're not going to pretend there is, but everyone loves chocolate so who cares.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.