Feeds
90%
ATI X1900 XTX graphics card

ATI Radeon X1900 XT and XTX

The world's fastest graphics cards?

Secure remote control for conventional and virtual desktops

Multi-texture fillrate

Multitexturing is bandwidth-limited as texture layers increase, hence the large lead for the GTX 512. It makes good use of 850MHz memory in this test. Even with the same ROP count, texture units and memory bandwidth as X1800 XT, X1900 XT still exhibits less performance loss, although only to the tune of 3.5 per cent.

ATI X1900 XTX graphics card

Floating-point texture bandwidth

We measure available texture bandwidth by asking the hardware to read from sequential locations in an FP16 texture, the second texel sample relying on the first, creating a dependant texture read.

ATI X1900 XTX graphics card

For some reason the hardware can't execute the texture read as fast as the R520 and the X1800 XT can, despite there being no theoretical reason other than a driver problem or issue scheduling the texture fetch. Software defeats the hardware, likely. We'll come back to that theme later.

Texture-fetch latency

In our texture-fetch test the R580 is again slightly slower than the R520 when fetching texels from a small texture. The entire texture fits nicely inside the GPU's texture cache on all three tested chips, indicating G70 has a larger texel cache bandwidth than either ATI chip.

ATI X1900 XTX graphics card

When using a texture that - even with compression - wouldn't fit inside the texture cache, ATI's high-end GPUs do better than the G70, although the R580 is still ever so slightly slower than the R520 at the same clocks.

ATI X1900 XTX graphics card

PCI Express bandwidth

As a nod to the modern GPU's ability to act prefectly well as a generally programmable parallel stream processor, and with R5-series GPUs supporting scatter writes into card memory from shader programs via an OpenGL extension, testing the PCI Express bandwidth of these high-end graphics boards when pushing data back to the GPU is prudent.

ATI X1900 XTX graphics card

The R580 and R520 have over 1000MBps of writeback bandwidth to use, given a suitable host platform. Indeed, the R580 is the first GPU, backed by nearly 50GBps of local memory bandwidth, we've tested that breaks the 1GBps barrier when squirting data back to the host.

Top 5 reasons to deploy VMware with Tegile

Next page: Verdict

More from The Register

next story
Nexus 7 fandroids tell of salty taste after sucking on Google's Lollipop
Web giant looking into why version 5.0 of Android is crippling older slabs
All aboard the Poo Bus! Ding ding, route Number Two departing
Only another three days of pooing and I can have a ride!
Heyyy! NICE e-bracelet you've got there ... SHAME if someone were to SUBPOENA it
Court pops open cans of worms and whup-ass in Fitbit case
Official: European members prefer to fondle Apple iPads
Only 7 of 50 parliamentarians plump for Samsung Galaxy S
Fujitsu CTO: We'll be 3D-printing tech execs in 15 years
Fleshy techie disses network neutrality, helmet-less motorcyclists
Space Commanders rebel as Elite:Dangerous kills offline mode
Frontier cops an epic kicking in its own forums ahead of December revival
The IT Crowd's internet in a box gets $240k of crowdcash for a cause
'Outernet' project proposes satellite-fuelled 'Lantern' WiFi library for remote areas
prev story

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
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.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Choosing a cloud hosting partner with confidence
Download Choosing a Cloud Hosting Provider with Confidence to learn more about cloud computing - the new opportunities and new security challenges.
New hybrid storage solutions
Tackling data challenges through emerging hybrid storage solutions that enable optimum database performance whilst managing costs and increasingly large data stores.