Intel is winning back share in the desktop CPU market. According to Mercury Research estimates, Intel's share of x86 desktop CPU shipments in the third quarter of 2026 rose 5 points from the previous quarter to 70.1%, while AMD fell to 29.9%. Yet the companies' quarterly filings show that year-over-year shipments of client CPUs, including those for laptops, fell for Intel and rose for AMD. The two results look contradictory, but they make sense once you recognize that desktop market share and overall client shipment volume are different metrics.
Intel recovers from 65.1% to 70.1%
Mercury Research estimates that in the second quarter of 2026, Intel held 65.1% of x86 desktop CPU shipments and AMD held 34.9%. In the third quarter, Intel rose to 70.1% and AMD fell to 29.9%, a 5-point swing for each company from the prior quarter. Intel has regained ground in desktops, but this figure alone does not reveal how many more units the company shipped.
According to Mercury Research's product information, its "PC Processor Report" estimates shipments, prices, and revenue by product segment, including desktop, laptop, and server. Desktop CPU shipment share represents each manufacturer's portion of all CPUs shipped to the market in a given quarter. Shipped CPUs are built into finished systems by PC makers or become retailer inventory, so a change in shipment share does not directly reflect consumer purchasing trends.
In fact, in the second quarter AMD's share rose even though its desktop CPU shipments declined. In Mercury Research's tally, total desktop CPU market shipments fell more than 20% year over year and also shrank from the previous quarter. During that period Intel's shipments fell by more than AMD's, so AMD gained relative share despite shipping fewer units. In other words, when the overall market is shrinking, a manufacturer's share can rise even as its shipments decline, as long as its rival's decline is steeper.
For AMD's shipments to stay flat, the whole market would need to grow about 17%
In the third quarter the situation reversed, and AMD's desktop CPU shipment share fell from 34.9% to 29.9%. A lower share does not necessarily mean lower shipments, however. Calculating how much the overall market would have had to grow for AMD to hold its second-quarter volume makes the difference clear.
A manufacturer's CPU shipments equal total market shipments multiplied by its share. If AMD's shipments were the same in the second and third quarters, the following relationship holds:
\[ Q_2 \times 0.349 = Q_3 \times 0.299 \]
Here, and represent total desktop CPU market shipments in the second and third quarters, respectively. From this equation, the required market growth rate can be calculated as follows:
\[ \frac{Q_3}{Q_2}-1 =\frac{0.349}{0.299}-1 \approx 0.1672 \]
In other words, for AMD to ship the same number of desktop CPUs as in the previous quarter, total market shipments would need to have grown by about 16.7%. If market growth exceeded that level, AMD shipped more units even as its share fell. Conversely, if growth was below 16.7%, AMD's shipments also declined. This figure is calculated from shares rounded to one decimal place, and confirming the actual change would require total shipment figures for both quarters.
Intel's shipments down 14%, AMD's up 6%
While Intel regained share in desktop CPUs, the broader client CPU market, including laptops, tells a different story. According to the Form 10-Q quarterly reports both companies filed with the U.S. Securities and Exchange Commission (SEC) for the third quarter of 2026, Intel's client shipments fell 14% year over year, while AMD's rose 6%. AMD said the growth in shipments was driven mainly by higher sales of Ryzen processors for laptops.
| Source | Scope | Comparison period | Metric and figure |
|---|---|---|---|
| Mercury Research estimates | x86 desktop CPU market | Q2 2026 → Q3 2026 | Intel: 65.1% → 70.1%, AMD: 34.9% → 29.9% |
| Intel 10-Q | Desktop and laptop client products | Q3 2025 → Q3 2026 | Shipments down 14% |
| AMD 10-Q | Client processors | Q3 2025 → Q3 2026 | Shipments up 6% |
Average selling prices also changed at both companies. Intel's average selling price for client products rose 9% year over year, and AMD's rose 1%. AMD's client segment revenue came to $2.949 billion, up about 7% from a year earlier. However, according to AMD's earnings release, that is a decline of about 3.7% from $3.062 billion in the previous quarter.
Thus, the same revenue figure moves in different directions depending on whether it is compared year over year or quarter over quarter. Moreover, Mercury Research's desktop CPU shipment share is a quarter-over-quarter comparison, while the changes in client shipments in the two 10-Qs are year-over-year, so the comparison periods do not match. Because laptop products are driving AMD's shipment growth, it is entirely possible for AMD to increase shipments across the client market while losing share in desktops.
Intel's improved supply and AMD's gaming PC demand
In its quarterly report, Intel cited weaker demand and competition as reasons for the decline in client shipments. It also explained that demand softened in the third quarter, which reduced the impact of supply constraints on its client business. Mercury Research suggests that lower demand for laptop CPUs may have given Intel spare supply capacity, allowing it to ship more to the desktop market, where shortages had been seen earlier in the year. Determining which products saw how much of a supply increase, however, would require detailed shipment data.
AMD, meanwhile, may not have seen the seasonal demand increase typical of the third quarter. Mercury Research points to gaming GPU supply constraints as one factor. Buying or building a gaming PC requires pairing a CPU with a GPU, so if GPUs are hard to obtain, entire PC purchases may be postponed. The view is that this situation, to which AMD is particularly exposed because of its reliance on the gaming PC market, may have suppressed desktop CPU demand.
Still, the effect of GPU shortages on AMD's CPU sales remains a hypothesis at this point. AMD's 10-Q treats its client and gaming businesses as a single reportable segment, but its earnings release discloses revenue for each. Gaming segment revenue in the third quarter of 2026 was $773 million, down 40% year over year. The main cause, however, was lower revenue from semi-custom products such as those for game consoles, which does not directly indicate weaker demand for desktop Ryzen. Revenue from gaming-oriented Ryzen is booked in the client segment, so judging the impact of GPU supply constraints would require a breakdown of shipments of gaming PCs and retail CPUs.
Looking at AMD's business as a whole, its data center segment continues to grow rapidly. Segment revenue in the third quarter of 2026 was $8.546 billion, up 97% from a year earlier. In its earnings release, the company also said it expects to expand production of Helios and Venice in the fourth quarter. Whether increased production of data center products will affect desktop CPU supply depends on how manufacturing capacity is allocated and on product-specific production plans, so it cannot be determined at this point.
What to watch: total shipments and channel inventory
Mercury Research's detailed quarterly reports are available to subscribers, and the public information reviewed here did not reveal total third-quarter 2026 desktop CPU market shipments or a breakdown by sales channel. As a result, while Intel's 5-point share gain is confirmed, it is not possible to determine how many additional CPUs Intel actually shipped or by how much AMD's shipments rose or fell. Accurately evaluating both companies' shipment trends requires comparing total shipments for the second and third quarters on the same scope.
Going forward, in addition to total market shipments, changes in inventory and pricing for both finished PCs and retail CPUs will be important indicators. Even if manufacturers ship more CPUs, that does not necessarily translate quickly into a better buying environment for consumers. Improved supply to PC makers could shorten delivery times for finished systems, while retail CPU inventory and prices may change on a different timeline. Whether Intel's share recovery reflects a temporary supply adjustment or a lasting recovery in its competitiveness in the desktop market will need to be judged by looking at shipment volumes and distribution-market trends together.